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                            <property name="tooltip-text" translatable="yes">Nominal passband wavelength in nm
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                        </child>
                        <child>
                          <object class="GtkLabel">
                            <property name="visible">True</property>
                            <property name="can-focus">False</property>
                            <property name="tooltip-text" translatable="yes">Filter bandwidth in nm</property>
                            <property name="label" translatable="yes">Bandwidth</property>
                          </object>
                          <packing>
                            <property name="left-attach">2</property>
                            <property name="top-attach">0</property>
                          </packing>
                        </child>
                        <child>
                          <object class="GtkSpinButton" id="spcc_nb_r_wl">
                            <property name="visible">True</property>
                            <property name="can-focus">True</property>
                            <property name="tooltip-text" translatable="yes">Enter the nominal wavelength of the red channel narrowband filter</property>
                            <property name="text">656,28</property>
                            <property name="adjustment">nb_r_wl</property>
                            <property name="digits">2</property>
                            <property name="value">656.27999999999997</property>
                            <signal name="value-changed" handler="on_nb_spin_changed" swapped="no"/>
                          </object>
                          <packing>
                            <property name="left-attach">1</property>
                            <property name="top-attach">1</property>
                          </packing>
                        </child>
                        <child>
                          <object class="GtkSpinButton" id="spcc_nb_b_wl">
                            <property name="visible">True</property>
                            <property name="can-focus">True</property>
                            <property name="tooltip-text" translatable="yes">Enter the nominal wavelength of the blue channel narrowband filter</property>
                            <property name="text">500,70</property>
                            <property name="adjustment">nb_b_wl</property>
                            <property name="digits">2</property>
                            <property name="value">500.69999999999999</property>
                            <signal name="value-changed" handler="on_nb_spin_changed" swapped="no"/>
                          </object>
                          <packing>
                            <property name="left-attach">1</property>
                            <property name="top-attach">3</property>
                          </packing>
                        </child>
                        <child>
                          <object class="GtkSpinButton" id="spcc_nb_g_wl">
                            <property name="visible">True</property>
                            <property name="can-focus">True</property>
                            <property name="tooltip-text" translatable="yes">Enter the nominal wavelength of the green channel narrowband filter</property>
                            <property name="text">500,70</property>
                            <property name="adjustment">nb_g_wl</property>
                            <property name="digits">2</property>
                            <property name="value">500.69999999999999</property>
                            <signal name="value-changed" handler="on_nb_spin_changed" swapped="no"/>
                          </object>
                          <packing>
                            <property name="left-attach">1</property>
                            <property name="top-attach">2</property>
                          </packing>
                        </child>
                        <child>
                          <object class="GtkSpinButton" id="spcc_nb_r_bw">
                            <property name="visible">True</property>
                            <property name="can-focus">True</property>
                            <property name="tooltip-text" translatable="yes">Enter the nominal bandwidth of the red channel narrowband filter</property>
                            <property name="text">6.0</property>
                            <property name="adjustment">nb_r_bw</property>
                            <property name="digits">1</property>
                            <property name="value">6</property>
                            <signal name="value-changed" handler="on_nb_spin_changed" swapped="no"/>
                          </object>
                          <packing>
                            <property name="left-attach">2</property>
                            <property name="top-attach">1</property>
                          </packing>
                        </child>
                        <child>
                          <object class="GtkSpinButton" id="spcc_nb_g_bw">
                            <property name="visible">True</property>
                            <property name="can-focus">True</property>
                            <property name="tooltip-text" translatable="yes">Enter the nominal bandwidth of the green channel narrowband filter</property>
                            <property name="text">6.0</property>
                            <property name="adjustment">nb_g_bw</property>
                            <property name="digits">1</property>
                            <property name="value">6</property>
                            <signal name="value-changed" handler="on_nb_spin_changed" swapped="no"/>
                          </object>
                          <packing>
                            <property name="left-attach">2</property>
                            <property name="top-attach">2</property>
                          </packing>
                        </child>
                        <child>
                          <object class="GtkSpinButton" id="spcc_nb_b_bw">
                            <property name="visible">True</property>
                            <property name="can-focus">True</property>
                            <property name="tooltip-text" translatable="yes">Enter the nominal bandwidth of the blue channel narrowband filter</property>
                            <property name="text">6.0</property>
                            <property name="adjustment">nb_b_bw</property>
                            <property name="digits">1</property>
                            <property name="value">6</property>
                            <signal name="value-changed" handler="on_nb_spin_changed" swapped="no"/>
                          </object>
                          <packing>
                            <property name="left-attach">2</property>
                            <property name="top-attach">3</property>
                          </packing>
                        </child>
                        <child>
                          <placeholder/>
                        </child>
                      </object>
                      <packing>
                        <property name="left-attach">0</property>
                        <property name="top-attach">9</property>
                        <property name="width">4</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkCheckButton" id="spcc_plot_fits">
                        <property name="label" translatable="yes">Plot fits</property>
                        <property name="visible">True</property>
                        <property name="can-focus">True</property>
                        <property name="receives-default">False</property>
                        <property name="tooltip-text" translatable="yes">Plot SPCC linear fits for catalog to image R/G and B/G ratios. In narrowband mode, plots of degenerate ratios will not be shown.</property>
                        <property name="active">True</property>
                        <property name="draw-indicator">True</property>
                      </object>
                      <packing>
                        <property name="left-attach">0</property>
                        <property name="top-attach">12</property>
                        <property name="width">4</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkLabel" id="label_spcc_sensor_type">
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="halign">start</property>
                        <property name="label" translatable="yes">Sensor Type:</property>
                      </object>
                      <packing>
                        <property name="left-attach">0</property>
                        <property name="top-attach">1</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkBox">
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="spacing">5</property>
                        <child>
                          <object class="GtkSwitch" id="spcc_sensor_switch">
                            <property name="visible">True</property>
                            <property name="can-focus">True</property>
                            <property name="halign">start</property>
                            <property name="valign">start</property>
                            <signal name="state-set" handler="on_spcc_sensor_switch_state_set" object="spcc_label_switch" swapped="no"/>
                          </object>
                          <packing>
                            <property name="expand">False</property>
                            <property name="fill">True</property>
                            <property name="position">0</property>
                          </packing>
                        </child>
                        <child>
                          <object class="GtkLabel" id="spcc_label_switch">
                            <property name="visible">True</property>
                            <property name="can-focus">False</property>
                            <property name="label" translatable="yes">mono</property>
                          </object>
                          <packing>
                            <property name="expand">False</property>
                            <property name="fill">True</property>
                            <property name="position">1</property>
                          </packing>
                        </child>
                      </object>
                      <packing>
                        <property name="left-attach">1</property>
                        <property name="top-attach">1</property>
                        <property name="width">2</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkCheckButton" id="spcc_toggle_nb">
                        <property name="label" translatable="yes">Narrowband mode</property>
                        <property name="visible">True</property>
                        <property name="can-focus">True</property>
                        <property name="receives-default">False</property>
                        <property name="tooltip-text" translatable="yes">Set narrowband mode. This is suitable for composited narrowband images such as HOO as well as for OSC images taken with dual narrowband filters etc.</property>
                        <property name="draw-indicator">True</property>
                        <signal name="toggled" handler="on_spcc_toggle_nb_toggled" swapped="no"/>
                      </object>
                      <packing>
                        <property name="left-attach">3</property>
                        <property name="top-attach">1</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkCheckButton" id="spcc_atmos_corr">
                        <property name="label" translatable="yes">Atmospheric corrections</property>
                        <property name="visible">True</property>
                        <property name="can-focus">True</property>
                        <property name="receives-default">False</property>
                        <property name="tooltip-text" translatable="yes">Apply an atmosphere model to account for wavelength-dependent atmospheric extinction.</property>
                        <property name="draw-indicator">True</property>
                        <signal name="toggled" handler="on_spcc_atmos_corr_toggled" swapped="no"/>
                      </object>
                      <packing>
                        <property name="left-attach">0</property>
                        <property name="top-attach">10</property>
                        <property name="width">4</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkExpander" id="spcc_atmos_widgets">
                        <property name="visible">True</property>
                        <property name="can-focus">True</property>
                        <child>
                          <!-- n-columns=3 n-rows=3 -->
                          <object class="GtkGrid">
                            <property name="visible">True</property>
                            <property name="can-focus">False</property>
                            <property name="row-spacing">6</property>
                            <property name="column-spacing">6</property>
                            <child>
                              <object class="GtkLabel">
                                <property name="visible">True</property>
                                <property name="can-focus">False</property>
                                <property name="halign">start</property>
                                <property name="label" translatable="yes">Observer height / m:</property>
                              </object>
                              <packing>
                                <property name="left-attach">0</property>
                                <property name="top-attach">0</property>
                              </packing>
                            </child>
                            <child>
                              <object class="GtkSpinButton" id="spcc_height">
                                <property name="visible">True</property>
                                <property name="can-focus">True</property>
                                <property name="tooltip-text" translatable="yes">Observer's height (altitude) above sea level.</property>
                                <property name="text">10.0</property>
                                <property name="adjustment">adjustment_spcc_height</property>
                                <property name="digits">1</property>
                                <property name="value">10</property>
                              </object>
                              <packing>
                                <property name="left-attach">1</property>
                                <property name="top-attach">0</property>
                              </packing>
                            </child>
                            <child>
                              <object class="GtkLabel">
                                <property name="visible">True</property>
                                <property name="can-focus">False</property>
                                <property name="halign">start</property>
                                <property name="label" translatable="yes">Atmospheric pressure / hPa:</property>
                              </object>
                              <packing>
                                <property name="left-attach">0</property>
                                <property name="top-attach">1</property>
                              </packing>
                            </child>
                            <child>
                              <object class="GtkSpinButton" id="spcc_pressure">
                                <property name="visible">True</property>
                                <property name="can-focus">True</property>
                                <property name="tooltip-text" translatable="yes">Atmospheric pressure in hPa. If the "sea level" check box is checked this is taken to be sea level pressure, otherwise it is taken to be local pressure at the observer's height.</property>
                                <property name="text">1013.00</property>
                                <property name="adjustment">adjustment_spcc_pressure</property>
                                <property name="digits">2</property>
                                <property name="value">1013</property>
                              </object>
                              <packing>
                                <property name="left-attach">1</property>
                                <property name="top-attach">1</property>
                              </packing>
                            </child>
                            <child>
                              <object class="GtkCheckButton" id="spcc_pressure_is_slp">
                                <property name="label" translatable="yes">sea level</property>
                                <property name="visible">True</property>
                                <property name="can-focus">True</property>
                                <property name="receives-default">False</property>
                                <property name="halign">start</property>
                                <property name="active">True</property>
                                <property name="draw-indicator">True</property>
                              </object>
                              <packing>
                                <property name="left-attach">2</property>
                                <property name="top-attach">1</property>
                              </packing>
                            </child>
                            <child>
                              <object class="GtkLabel">
                                <property name="visible">True</property>
                                <property name="can-focus">False</property>
                                <property name="halign">start</property>
                                <property name="label" translatable="yes">Airmass:</property>
                              </object>
                              <packing>
                                <property name="left-attach">0</property>
                                <property name="top-attach">2</property>
                              </packing>
                            </child>
                            <child>
                              <object class="GtkButton" id="spcc_plot_atmos">
                                <property name="label" translatable="yes">Plot</property>
                                <property name="visible">True</property>
                                <property name="can-focus">True</property>
                                <property name="receives-default">True</property>
                                <property name="tooltip-text" translatable="yes">Plot atmosphere model</property>
                                <signal name="clicked" handler="on_spcc_plot_atmos_clicked" swapped="no"/>
                              </object>
                              <packing>
                                <property name="left-attach">2</property>
                                <property name="top-attach">2</property>
                              </packing>
                            </child>
                            <child>
                              <object class="GtkEntry" id="spcc_airmass_entry">
                                <property name="visible">True</property>
                                <property name="sensitive">False</property>
                                <property name="can-focus">True</property>
                                <property name="editable">False</property>
                              </object>
                              <packing>
                                <property name="left-attach">1</property>
                                <property name="top-attach">2</property>
                              </packing>
                            </child>
                            <child>
                              <placeholder/>
                            </child>
                          </object>
                        </child>
                        <child type="label">
                          <object class="GtkLabel">
                            <property name="visible">True</property>
                            <property name="can-focus">False</property>
                            <property name="margin-bottom">5</property>
                            <property name="label" translatable="yes">Atmospheric Parameters</property>
                            <attributes>
                              <attribute name="weight" value="bold"/>
                            </attributes>
                          </object>
                        </child>
                      </object>
                      <packing>
                        <property name="left-attach">0</property>
                        <property name="top-attach">11</property>
                        <property name="width">4</property>
                      </packing>
                    </child>
                  </object>
                </child>
                <child type="label">
                  <object class="GtkLabel">
                    <property name="visible">True</property>
                    <property name="can-focus">False</property>
                    <property name="margin-bottom">5</property>
                    <property name="label" translatable="yes">SPCC Parameters</property>
                    <attributes>
                      <attribute name="weight" value="bold"/>
                    </attributes>
                  </object>
                </child>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="fill">True</property>
                <property name="position">0</property>
              </packing>
            </child>
            <child>
              <object class="GtkExpander" id="labelPCCCatalogParameters">
                <property name="visible">True</property>
                <property name="can-focus">True</property>
                <property name="margin-start">5</property>
                <property name="margin-top">5</property>
                <property name="margin-bottom">5</property>
                <property name="expanded">True</property>
                <child>
                  <!-- n-columns=4 n-rows=2 -->
                  <object class="GtkGrid" id="GtkGridIPS2">
                    <property name="visible">True</property>
                    <property name="can-focus">False</property>
                    <property name="row-spacing">5</property>
                    <property name="column-spacing">5</property>
                    <child>
                      <object class="GtkComboBoxText" id="ComboBoxPCCCatalog">
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="tooltip-text" translatable="yes">Choose the online catalogue against one want to compare the image and compute photometry.
* NOMAD is a simple merge of data from the Hipparcos, Tycho-2, UCAC2, Yellow-Blue 6, and USNO-B catalogs for astrometry and optical photometry, supplemented by 2MASS near-infrared. The almost 100 GB dataset contains astrometric and photometric data for about 1.1 billion stars.
* APASS, the AAVSO Photometric All Sky Survey, is performing an all-sky photometric survey. This survey is conducted in eight filters: Johnson B and V, plus Sloan u', g′, r′, i′, z_s and Z. It is valid from about 7th magnitude to about 17th magnitude for over 37 million stars.
* Gaia Data Release 3 was released on 13 June 2022. Photometry is given for around 1.46 billion sources, with a limiting magnitude of G = 21. It uses different filters from Johnson B and V, however it provides measures of source effective temperature based on the source's spectrum, and Siril uses this Teff for PCC.</property>
                        <property name="active">0</property>
                        <items>
                          <item>NOMAD</item>
                          <item translatable="yes">APASS</item>
                          <item translatable="yes">GAIA DR3</item>
                        </items>
                        <signal name="changed" handler="on_combophoto_catalog_changed" swapped="no"/>
                      </object>
                      <packing>
                        <property name="left-attach">1</property>
                        <property name="top-attach">0</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkLabel" id="GtkLabelCatalogPCC">
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="halign">start</property>
                        <property name="label" translatable="yes">Photometric Star Catalogue: </property>
                      </object>
                      <packing>
                        <property name="left-attach">0</property>
                        <property name="top-attach">0</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkLabel">
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="halign">start</property>
                        <property name="label" translatable="yes">Catalogue Limit Mag: </property>
                      </object>
                      <packing>
                        <property name="left-attach">0</property>
                        <property name="top-attach">1</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkSpinButton" id="GtkSpinPCC_Mag_Limit">
                        <property name="visible">True</property>
                        <property name="sensitive">False</property>
                        <property name="can-focus">True</property>
                        <property name="tooltip-text" translatable="yes">Maximum star magnitude used in the catalog queries. Wider is the field, lower is the value.</property>
                        <property name="text">12</property>
                        <property name="input-hints">GTK_INPUT_HINT_NO_EMOJI | GTK_INPUT_HINT_NONE</property>
                        <property name="adjustment">Adj_pcc_Mag_Limit</property>
                        <property name="value">12</property>
                      </object>
                      <packing>
                        <property name="left-attach">1</property>
                        <property name="top-attach">1</property>
                        <property name="width">2</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkComboBoxText" id="ComboBoxSPCCCatalog">
                        <property name="can-focus">False</property>
                        <property name="tooltip-text" translatable="yes">Choose the catalogue to use for spectrophotometric colour calibration.
* Gaia DR3 archive is an online service providing direct access to the Gaia DR3 catalogue.
* Local Gaia DR3 xp_sampled catalogue is an optimized local catalogue designed for SPCC.
Gaia DR3 contains sampled spectra for c. 30 million stars down to magnitude 17.6.</property>
                        <property name="active">0</property>
                        <items>
                          <item>Gaia DR3 (remote catalogue)</item>
                          <item translatable="yes">Gaia DR3 (local catalogue)</item>
                        </items>
                        <signal name="changed" handler="on_ComboBoxSPCCCatalog_changed" swapped="no"/>
                      </object>
                      <packing>
                        <property name="left-attach">2</property>
                        <property name="top-attach">0</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkCheckButton" id="S_PCC_Mag_Limit">
                        <property name="label" translatable="yes">Auto</property>
                        <property name="visible">True</property>
                        <property name="can-focus">True</property>
                        <property name="receives-default">False</property>
                        <property name="tooltip-text" translatable="yes">The limit magnitude is automatically determined using the approximation of the Field Of View.</property>
                        <property name="halign">start</property>
                        <property name="active">True</property>
                        <property name="draw-indicator">True</property>
                        <signal name="toggled" handler="on_S_PCC_Mag_Limit_toggled" swapped="no"/>
                      </object>
                      <packing>
                        <property name="left-attach">3</property>
                        <property name="top-attach">1</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkLabel" id="photometric_catalog_label">
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="tooltip-text" translatable="yes">The NOMAD catalogue can be installed locally to not rely on an Internet connection for this operation.</property>
                        <property name="margin-left">4</property>
                        <property name="margin-start">4</property>
                      </object>
                      <packing>
                        <property name="left-attach">3</property>
                        <property name="top-attach">0</property>
                      </packing>
                    </child>
                  </object>
                </child>
                <child type="label">
                  <object class="GtkLabel">
                    <property name="visible">True</property>
                    <property name="can-focus">False</property>
                    <property name="margin-bottom">5</property>
                    <property name="label" translatable="yes">Catalogue Parameters</property>
                    <attributes>
                      <attribute name="weight" value="bold"/>
                    </attributes>
                  </object>
                </child>
              </object>
              <packing>
                <property name="expand">True</property>
                <property name="fill">True</property>
                <property name="position">1</property>
              </packing>
            </child>
            <child>
              <object class="GtkExpander" id="frame_cc_background">
                <property name="visible">True</property>
                <property name="can-focus">True</property>
                <property name="margin-start">5</property>
                <property name="margin-top">5</property>
                <property name="margin-bottom">5</property>
                <child>
                  <object class="GtkBox" id="box_cc_background">
                    <property name="visible">True</property>
                    <property name="can-focus">False</property>
                    <property name="orientation">vertical</property>
                    <property name="spacing">6</property>
                    <child>
                      <object class="GtkBox">
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="orientation">vertical</property>
                        <property name="spacing">6</property>
                        <child>
                          <object class="GtkLabel" id="label1">
                            <property name="visible">True</property>
                            <property name="can-focus">False</property>
                            <property name="halign">start</property>
                            <property name="label" translatable="yes">Tolerance / σ</property>
                          </object>
                          <packing>
                            <property name="expand">False</property>
                            <property name="fill">True</property>
                            <property name="position">0</property>
                          </packing>
                        </child>
                        <child>
                          <object class="GtkSpinButton" id="bg_tol_upper">
                            <property name="visible">True</property>
                            <property name="can-focus">True</property>
                            <property name="tooltip-text" translatable="yes">Include background samples this many σ above the median. Default is 2.00</property>
                            <property name="halign">start</property>
                            <property name="width-chars">5</property>
                            <property name="text">2.00</property>
                            <property name="adjustment">adj_bg_sigma_lower</property>
                            <property name="digits">2</property>
                            <property name="value">2</property>
                          </object>
                          <packing>
                            <property name="expand">False</property>
                            <property name="fill">True</property>
                            <property name="position">1</property>
                          </packing>
                        </child>
                        <child>
                          <object class="GtkSpinButton" id="bg_tol_lower">
                            <property name="visible">True</property>
                            <property name="can-focus">True</property>
                            <property name="tooltip-text" translatable="yes">Include background samples this many σ below the median. Default is 2.8</property>
                            <property name="halign">start</property>
                            <property name="width-chars">5</property>
                            <property name="text">2.80</property>
                            <property name="adjustment">adj_bg_sigma_upper</property>
                            <property name="digits">2</property>
                            <property name="value">2.7999999999999998</property>
                          </object>
                          <packing>
                            <property name="expand">False</property>
                            <property name="fill">True</property>
                            <property name="position">2</property>
                          </packing>
                        </child>
                      </object>
                      <packing>
                        <property name="expand">False</property>
                        <property name="fill">True</property>
                        <property name="position">0</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkCheckButton" id="button_cc_bkg_auto">
                        <property name="label" translatable="yes">Automatic detection</property>
                        <property name="visible">True</property>
                        <property name="can-focus">True</property>
                        <property name="receives-default">False</property>
                        <property name="tooltip-text" translatable="yes">Uncheck this button if you want to select the background reference by yourself. It can be useful when nebulae cover a large portion of the image.</property>
                        <property name="halign">start</property>
                        <property name="active">True</property>
                        <property name="draw-indicator">True</property>
                        <signal name="toggled" handler="on_button_cc_bkg_auto_toggled" swapped="no"/>
                      </object>
                      <packing>
                        <property name="expand">False</property>
                        <property name="fill">True</property>
                        <property name="position">1</property>
                      </packing>
                    </child>
                    <child>
                      <object class="GtkBox">
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="spacing">6</property>
                        <child>
                          <object class="GtkBox" id="box_cc_manual_bkg">
                            <property name="visible">True</property>
                            <property name="sensitive">False</property>
                            <property name="can-focus">False</property>
                            <property name="spacing">5</property>
                            <child>
                              <!-- n-columns=2 n-rows=3 -->
                              <object class="GtkGrid" id="grid46">
                                <property name="visible">True</property>
                                <property name="can-focus">False</property>
                                <property name="row-spacing">5</property>
                                <property name="column-spacing">5</property>
                                <property name="column-homogeneous">True</property>
                                <child>
                                  <object class="GtkSpinButton" id="spin_cc_bkg_x">
                                    <property name="visible">True</property>
                                    <property name="can-focus">True</property>
                                    <property name="tooltip-text" translatable="yes">x coordinate of the start of the background selection</property>
                                    <property name="editable">False</property>
                                    <property name="width-chars">6</property>
                                    <property name="text" translatable="yes">0</property>
                                    <property name="input-purpose">number</property>
                                    <property name="input-hints">GTK_INPUT_HINT_NO_EMOJI | GTK_INPUT_HINT_NONE</property>
                                    <property name="adjustment">adjustment_cc_bkg_x</property>
                                    <property name="numeric">True</property>
                                  </object>
                                  <packing>
                                    <property name="left-attach">0</property>
                                    <property name="top-attach">1</property>
                                  </packing>
                                </child>
                                <child>
                                  <object class="GtkSpinButton" id="spin_cc_bkg_y">
                                    <property name="visible">True</property>
                                    <property name="can-focus">True</property>
                                    <property name="tooltip-text" translatable="yes">y coordinate of the start of the background selection</property>
                                    <property name="editable">False</property>
                                    <property name="width-chars">6</property>
                                    <property name="text" translatable="yes">0</property>
                                    <property name="input-purpose">number</property>
                                    <property name="input-hints">GTK_INPUT_HINT_NO_EMOJI | GTK_INPUT_HINT_NONE</property>
                                    <property name="adjustment">adjustment_cc_bkg_y</property>
                                    <property name="numeric">True</property>
                                  </object>
                                  <packing>
                                    <property name="left-attach">1</property>
                                    <property name="top-attach">1</property>
                                  </packing>
                                </child>
                                <child>
                                  <object class="GtkSpinButton" id="spin_cc_bkg_w">
                                    <property name="visible">True</property>
                                    <property name="can-focus">True</property>
                                    <property name="tooltip-text" translatable="yes">Width of the background selection</property>
                                    <property name="editable">False</property>
                                    <property name="width-chars">6</property>
                                    <property name="text" translatable="yes">0</property>
                                    <property name="input-purpose">number</property>
                                    <property name="input-hints">GTK_INPUT_HINT_NO_EMOJI | GTK_INPUT_HINT_NONE</property>
                                    <property name="adjustment">adjustment_cc_bkg_w</property>
                                    <property name="numeric">True</property>
                                  </object>
                                  <packing>
                                    <property name="left-attach">0</property>
                                    <property name="top-attach">2</property>
                                  </packing>
                                </child>
                                <child>
                                  <object class="GtkSpinButton" id="spin_cc_bkg_h">
                                    <property name="visible">True</property>
                                    <property name="can-focus">True</property>
                                    <property name="tooltip-text" translatable="yes">Height of the background selection</property>
                                    <property name="editable">False</property>
                                    <property name="width-chars">6</property>
                                    <property name="text" translatable="yes">0</property>
                                    <property name="input-purpose">number</property>
                                    <property name="input-hints">GTK_INPUT_HINT_NO_EMOJI | GTK_INPUT_HINT_NONE</property>
                                    <property name="adjustment">adjustment_cc_bkg_h</property>
                                    <property name="numeric">True</property>
                                  </object>
                                  <packing>
                                    <property name="left-attach">1</property>
                                    <property name="top-attach">2</property>
                                  </packing>
                                </child>
                                <child>
                                  <object class="GtkLabel" id="label180">
                                    <property name="visible">True</property>
                                    <property name="can-focus">False</property>
                                    <property name="label" translatable="yes">Selected area</property>
                                  </object>
                                  <packing>
                                    <property name="left-attach">0</property>
                                    <property name="top-attach">0</property>
                                    <property name="width">2</property>
                                  </packing>
                                </child>
                              </object>
                              <packing>
                                <property name="expand">False</property>
                                <property name="fill">True</property>
                                <property name="position">0</property>
                              </packing>
                            </child>
                            <child>
                              <object class="GtkButton" id="button_cc_bkg_selection">
                                <property name="label" translatable="yes">Use current selection</property>
                                <property name="visible">True</property>
                                <property name="can-focus">True</property>
                                <property name="receives-default">True</property>
                                <property name="tooltip-text" translatable="yes">You must specify a selection that represents the true background of the image, trying to exclude all stars or other stellar objects.</property>
                                <property name="halign">center</property>
                                <property name="valign">center</property>
                                <signal name="clicked" handler="on_button_cc_bkg_selection_clicked" swapped="no"/>
                              </object>
                              <packing>
                                <property name="expand">False</property>
                                <property name="fill">True</property>
                                <property name="position">1</property>
                              </packing>
                            </child>
                          </object>
                          <packing>
                            <property name="expand">False</property>
                            <property name="fill">True</property>
                            <property name="position">0</property>
                          </packing>
                        </child>
                      </object>
                      <packing>
                        <property name="expand">False</property>
                        <property name="fill">True</property>
                        <property name="position">2</property>
                      </packing>
                    </child>
                  </object>
                </child>
                <child type="label">
                  <object class="GtkLabel">
                    <property name="visible">True</property>
                    <property name="can-focus">False</property>
                    <property name="margin-bottom">5</property>
                    <property name="label" translatable="yes">Background Reference</property>
                    <attributes>
                      <attribute name="weight" value="bold"/>
                    </attributes>
                  </object>
                </child>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="fill">True</property>
                <property name="position">3</property>
              </packing>
            </child>
          </object>
          <packing>
            <property name="expand">True</property>
            <property name="fill">True</property>
            <property name="position">1</property>
          </packing>
        </child>
      </object>
    </child>
  </object>
</interface>
