Column descriptions of the 1CGH catalogue. The table lists the column names, units where applicable, and detailed explanations of their contents.
| Column name . | Description . |
|---|---|
| 1CGH_name | Source identifier, formatted as 1CGHJ0123+0123, based on J2000 coordinates. It includes four digits each for RA and Dec. For associated sources, the coordinates are from the counterpart; for unassociated sources, we follow 4FGL-DR4 astrometry. |
| RA_1CGH | RA (J2000) in degrees. |
| DEC_1CGH | Dec. (J2000) in degrees. |
| Counterpart_name | Name of the source from catalogues such as 5BZcat, 3HSP, 4FGL-DR4, or others. |
| N0 (1E−16) | Normalization constant of the power-law fit in units of photons cm|$^{-2}$| s−1 MeV−1 at the pivot energy. |
| N0_err (1E−16) | Uncertainty in the normalization constant. |
| Index | Photon spectral index of the power-law model. |
| Index_err | Uncertainty in the photon spectral index. |
| Flux (1E−12) | Integrated photon flux (10–800 GeV) in units of photons cm|$^{-2}$| s−1, estimated with a power-law fit. |
| Flux_err (1E−12) | Uncertainty in the integrated photon flux. |
| TS | Test statistic value for the source detection. |
| sigma | The significance for the source detection. |
| z | Redshift of the source. |
| zflag | Redshift reliability flag: (1) spectroscopic, (2) photometric/uncertain, and (3) lower limit. |
| z_origin | Reference for the redshift, as described in the text. For cases with no corresponding redshift value, it tracks sources where spectroscopic observation has been attempted. |
| Nph_128 | Number of photons associated (Source_type events, evclass = 128). |
| Emax_128 (GeV) | Maximum photon energy detected (evclass = 128). |
| Nph_512 | Number of photons associated (UltraClean_type events, evclass = 512). |
| Emax_512 (GeV) | Maximum photon energy detected (evclass = 512). |
| Ebin_max (GeV) | Mean energy of the four highest energy photons (evclass = 128). |
| TransmissionEbin | Flux transmission factor at |$E^{\rm{bin}}_{\rm{max}}$|. |
| AbsEbin | Flux absorption factor at |$E^{\rm{bin}}_{\rm{max}}$|, calculated as (|$1 -$| Transmission). |
| tauEbin | EBL optical depth at |$E^{\rm{bin}}_{\rm{max}}$|. |
| Abs_flag | Absorption flag: (1) |$\tau > 0.1$| (moderate to severe absorption) and (0) |$\tau \le 0.1$|. |
| GAL_LAT | Galactic latitude in degrees. |
| BZcat | Identifier in the 5BZcat catalogue, if available. |
| z_3HSP | Redshift from the 3HSP catalogue, if available. |
| zflag_3HSP | Redshift flag from the 3HSP catalogue: (1) spectroscopic, (2) uncertain, (3) lower limit redshift, (4) photometric – with featureless optical spectrum, and (5) photometric – without optical spectrum. |
| 4FGL_counter_name | Counterpart name in 4FGL-DR4. |
| TEVCAT_FLAG_4FGLdr4 | Flag for TeVCat association, as per 4FGL-DR4. |
| ASSOC_TEV_4FGLdr4 | TeV association in 4FGL-DR4. |
| CLASS1_4FGLdr4 | Classification in 4FGL-DR4. |
| ASSOC1_4FGLdr4 | Counterpart name in 4FGL-DR4. |
| Name_4LACdr3 | Counterpart name in 4LAC-DR3. |
| z_4LACdr3_1 | Redshift as reported in 4LAC-DR3. |
| Name_3FHL | Counterpart name in 3FHL. |
| z_3FHL | Redshift as reported in 3FHL. |
| Curvature_3FHL | Detectable spectral curvature in 3FHL: (1) yes, (2) no, and (–) unknown. Sources marked as ‘unknown’ are out of the 3FHL catalogue. |
| Column name . | Description . |
|---|---|
| 1CGH_name | Source identifier, formatted as 1CGHJ0123+0123, based on J2000 coordinates. It includes four digits each for RA and Dec. For associated sources, the coordinates are from the counterpart; for unassociated sources, we follow 4FGL-DR4 astrometry. |
| RA_1CGH | RA (J2000) in degrees. |
| DEC_1CGH | Dec. (J2000) in degrees. |
| Counterpart_name | Name of the source from catalogues such as 5BZcat, 3HSP, 4FGL-DR4, or others. |
| N0 (1E−16) | Normalization constant of the power-law fit in units of photons cm|$^{-2}$| s−1 MeV−1 at the pivot energy. |
| N0_err (1E−16) | Uncertainty in the normalization constant. |
| Index | Photon spectral index of the power-law model. |
| Index_err | Uncertainty in the photon spectral index. |
| Flux (1E−12) | Integrated photon flux (10–800 GeV) in units of photons cm|$^{-2}$| s−1, estimated with a power-law fit. |
| Flux_err (1E−12) | Uncertainty in the integrated photon flux. |
| TS | Test statistic value for the source detection. |
| sigma | The significance for the source detection. |
| z | Redshift of the source. |
| zflag | Redshift reliability flag: (1) spectroscopic, (2) photometric/uncertain, and (3) lower limit. |
| z_origin | Reference for the redshift, as described in the text. For cases with no corresponding redshift value, it tracks sources where spectroscopic observation has been attempted. |
| Nph_128 | Number of photons associated (Source_type events, evclass = 128). |
| Emax_128 (GeV) | Maximum photon energy detected (evclass = 128). |
| Nph_512 | Number of photons associated (UltraClean_type events, evclass = 512). |
| Emax_512 (GeV) | Maximum photon energy detected (evclass = 512). |
| Ebin_max (GeV) | Mean energy of the four highest energy photons (evclass = 128). |
| TransmissionEbin | Flux transmission factor at |$E^{\rm{bin}}_{\rm{max}}$|. |
| AbsEbin | Flux absorption factor at |$E^{\rm{bin}}_{\rm{max}}$|, calculated as (|$1 -$| Transmission). |
| tauEbin | EBL optical depth at |$E^{\rm{bin}}_{\rm{max}}$|. |
| Abs_flag | Absorption flag: (1) |$\tau > 0.1$| (moderate to severe absorption) and (0) |$\tau \le 0.1$|. |
| GAL_LAT | Galactic latitude in degrees. |
| BZcat | Identifier in the 5BZcat catalogue, if available. |
| z_3HSP | Redshift from the 3HSP catalogue, if available. |
| zflag_3HSP | Redshift flag from the 3HSP catalogue: (1) spectroscopic, (2) uncertain, (3) lower limit redshift, (4) photometric – with featureless optical spectrum, and (5) photometric – without optical spectrum. |
| 4FGL_counter_name | Counterpart name in 4FGL-DR4. |
| TEVCAT_FLAG_4FGLdr4 | Flag for TeVCat association, as per 4FGL-DR4. |
| ASSOC_TEV_4FGLdr4 | TeV association in 4FGL-DR4. |
| CLASS1_4FGLdr4 | Classification in 4FGL-DR4. |
| ASSOC1_4FGLdr4 | Counterpart name in 4FGL-DR4. |
| Name_4LACdr3 | Counterpart name in 4LAC-DR3. |
| z_4LACdr3_1 | Redshift as reported in 4LAC-DR3. |
| Name_3FHL | Counterpart name in 3FHL. |
| z_3FHL | Redshift as reported in 3FHL. |
| Curvature_3FHL | Detectable spectral curvature in 3FHL: (1) yes, (2) no, and (–) unknown. Sources marked as ‘unknown’ are out of the 3FHL catalogue. |
Column descriptions of the 1CGH catalogue. The table lists the column names, units where applicable, and detailed explanations of their contents.
| Column name . | Description . |
|---|---|
| 1CGH_name | Source identifier, formatted as 1CGHJ0123+0123, based on J2000 coordinates. It includes four digits each for RA and Dec. For associated sources, the coordinates are from the counterpart; for unassociated sources, we follow 4FGL-DR4 astrometry. |
| RA_1CGH | RA (J2000) in degrees. |
| DEC_1CGH | Dec. (J2000) in degrees. |
| Counterpart_name | Name of the source from catalogues such as 5BZcat, 3HSP, 4FGL-DR4, or others. |
| N0 (1E−16) | Normalization constant of the power-law fit in units of photons cm|$^{-2}$| s−1 MeV−1 at the pivot energy. |
| N0_err (1E−16) | Uncertainty in the normalization constant. |
| Index | Photon spectral index of the power-law model. |
| Index_err | Uncertainty in the photon spectral index. |
| Flux (1E−12) | Integrated photon flux (10–800 GeV) in units of photons cm|$^{-2}$| s−1, estimated with a power-law fit. |
| Flux_err (1E−12) | Uncertainty in the integrated photon flux. |
| TS | Test statistic value for the source detection. |
| sigma | The significance for the source detection. |
| z | Redshift of the source. |
| zflag | Redshift reliability flag: (1) spectroscopic, (2) photometric/uncertain, and (3) lower limit. |
| z_origin | Reference for the redshift, as described in the text. For cases with no corresponding redshift value, it tracks sources where spectroscopic observation has been attempted. |
| Nph_128 | Number of photons associated (Source_type events, evclass = 128). |
| Emax_128 (GeV) | Maximum photon energy detected (evclass = 128). |
| Nph_512 | Number of photons associated (UltraClean_type events, evclass = 512). |
| Emax_512 (GeV) | Maximum photon energy detected (evclass = 512). |
| Ebin_max (GeV) | Mean energy of the four highest energy photons (evclass = 128). |
| TransmissionEbin | Flux transmission factor at |$E^{\rm{bin}}_{\rm{max}}$|. |
| AbsEbin | Flux absorption factor at |$E^{\rm{bin}}_{\rm{max}}$|, calculated as (|$1 -$| Transmission). |
| tauEbin | EBL optical depth at |$E^{\rm{bin}}_{\rm{max}}$|. |
| Abs_flag | Absorption flag: (1) |$\tau > 0.1$| (moderate to severe absorption) and (0) |$\tau \le 0.1$|. |
| GAL_LAT | Galactic latitude in degrees. |
| BZcat | Identifier in the 5BZcat catalogue, if available. |
| z_3HSP | Redshift from the 3HSP catalogue, if available. |
| zflag_3HSP | Redshift flag from the 3HSP catalogue: (1) spectroscopic, (2) uncertain, (3) lower limit redshift, (4) photometric – with featureless optical spectrum, and (5) photometric – without optical spectrum. |
| 4FGL_counter_name | Counterpart name in 4FGL-DR4. |
| TEVCAT_FLAG_4FGLdr4 | Flag for TeVCat association, as per 4FGL-DR4. |
| ASSOC_TEV_4FGLdr4 | TeV association in 4FGL-DR4. |
| CLASS1_4FGLdr4 | Classification in 4FGL-DR4. |
| ASSOC1_4FGLdr4 | Counterpart name in 4FGL-DR4. |
| Name_4LACdr3 | Counterpart name in 4LAC-DR3. |
| z_4LACdr3_1 | Redshift as reported in 4LAC-DR3. |
| Name_3FHL | Counterpart name in 3FHL. |
| z_3FHL | Redshift as reported in 3FHL. |
| Curvature_3FHL | Detectable spectral curvature in 3FHL: (1) yes, (2) no, and (–) unknown. Sources marked as ‘unknown’ are out of the 3FHL catalogue. |
| Column name . | Description . |
|---|---|
| 1CGH_name | Source identifier, formatted as 1CGHJ0123+0123, based on J2000 coordinates. It includes four digits each for RA and Dec. For associated sources, the coordinates are from the counterpart; for unassociated sources, we follow 4FGL-DR4 astrometry. |
| RA_1CGH | RA (J2000) in degrees. |
| DEC_1CGH | Dec. (J2000) in degrees. |
| Counterpart_name | Name of the source from catalogues such as 5BZcat, 3HSP, 4FGL-DR4, or others. |
| N0 (1E−16) | Normalization constant of the power-law fit in units of photons cm|$^{-2}$| s−1 MeV−1 at the pivot energy. |
| N0_err (1E−16) | Uncertainty in the normalization constant. |
| Index | Photon spectral index of the power-law model. |
| Index_err | Uncertainty in the photon spectral index. |
| Flux (1E−12) | Integrated photon flux (10–800 GeV) in units of photons cm|$^{-2}$| s−1, estimated with a power-law fit. |
| Flux_err (1E−12) | Uncertainty in the integrated photon flux. |
| TS | Test statistic value for the source detection. |
| sigma | The significance for the source detection. |
| z | Redshift of the source. |
| zflag | Redshift reliability flag: (1) spectroscopic, (2) photometric/uncertain, and (3) lower limit. |
| z_origin | Reference for the redshift, as described in the text. For cases with no corresponding redshift value, it tracks sources where spectroscopic observation has been attempted. |
| Nph_128 | Number of photons associated (Source_type events, evclass = 128). |
| Emax_128 (GeV) | Maximum photon energy detected (evclass = 128). |
| Nph_512 | Number of photons associated (UltraClean_type events, evclass = 512). |
| Emax_512 (GeV) | Maximum photon energy detected (evclass = 512). |
| Ebin_max (GeV) | Mean energy of the four highest energy photons (evclass = 128). |
| TransmissionEbin | Flux transmission factor at |$E^{\rm{bin}}_{\rm{max}}$|. |
| AbsEbin | Flux absorption factor at |$E^{\rm{bin}}_{\rm{max}}$|, calculated as (|$1 -$| Transmission). |
| tauEbin | EBL optical depth at |$E^{\rm{bin}}_{\rm{max}}$|. |
| Abs_flag | Absorption flag: (1) |$\tau > 0.1$| (moderate to severe absorption) and (0) |$\tau \le 0.1$|. |
| GAL_LAT | Galactic latitude in degrees. |
| BZcat | Identifier in the 5BZcat catalogue, if available. |
| z_3HSP | Redshift from the 3HSP catalogue, if available. |
| zflag_3HSP | Redshift flag from the 3HSP catalogue: (1) spectroscopic, (2) uncertain, (3) lower limit redshift, (4) photometric – with featureless optical spectrum, and (5) photometric – without optical spectrum. |
| 4FGL_counter_name | Counterpart name in 4FGL-DR4. |
| TEVCAT_FLAG_4FGLdr4 | Flag for TeVCat association, as per 4FGL-DR4. |
| ASSOC_TEV_4FGLdr4 | TeV association in 4FGL-DR4. |
| CLASS1_4FGLdr4 | Classification in 4FGL-DR4. |
| ASSOC1_4FGLdr4 | Counterpart name in 4FGL-DR4. |
| Name_4LACdr3 | Counterpart name in 4LAC-DR3. |
| z_4LACdr3_1 | Redshift as reported in 4LAC-DR3. |
| Name_3FHL | Counterpart name in 3FHL. |
| z_3FHL | Redshift as reported in 3FHL. |
| Curvature_3FHL | Detectable spectral curvature in 3FHL: (1) yes, (2) no, and (–) unknown. Sources marked as ‘unknown’ are out of the 3FHL catalogue. |
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