Open Access
Table B.1.
Format of the catalogue of spectroscopically identified bright quasars from Euclid Q1.
| Column | Name | Unit | Type | Description |
|---|---|---|---|---|
| 1 | object_id | ... | long | Euclid Q1 unique source identifier |
| 2 | name | ... | string | IAU-formatted source name (EUCL JHHMMSS.ss+DDMMSS.s) |
| 3 | ra | deg | double | Source barycentre right ascension coordinate in decimal degrees |
| 4 | dec | deg | double | Source barycentre declination coordinate in decimal degrees |
| 5 | class_vi | ... | string | Visual classification of the source |
| 6 | z_vi | ... | double | Visual redshift of the source |
| 7 | sum_mask | ... | int | Sum of the mask values of the spectrum within [12047, 18734] Å |
| 8 | n_invalid | ... | int | Number of invalid pixels in the spectrum within [12047, 18734] Å |
| 9 | med_snr | ... | double | Median signal-to-noise ratio of the spectrum within [12047, 18734] Å |
| 10 | mumax_minus_mag | mag arcsec−2 | double | The difference between mu_max and mag_stargal_sep, valid even for NIR-only |
| sources | ||||
| 11 | kron_radius | pix | double | Major semi-axis (in pixels) of the elliptical aperture used for total (Kron) aperture |
| photometry on the detection image | ||||
| 12 | gaia_id | ... | long | The associated Gaia DR3 source id |
| 13 | f_psf | ... | double | PSF fraction of the source from VIS image |
| (Euclid Collaboration: Margalef-Bentabol et al. 2026) | ||||
| 14 | mag_vis_psf | mag | double | VIS IE band PSF-fitting AB magnitude (from flux_vis_psf) |
| 15 | magerr_vis_psf | mag | double | Error on VIS IE band PSF-fitting AB magnitude |
| 16 | mag_y_templfit | mag | double | YE band template-fit AB magnitude (from flux_y_templfit) |
| 17 | magerr_y_templfit | mag | double | Error on YE band template-fit AB magnitude |
| 18 | mag_j_templfit | mag | double | JE band template-fit AB magnitude (from flux_j_templfit) |
| 19 | magerr_j_templfit | mag | double | Error on JE band template-fit AB magnitude |
| 20 | mag_h_templfit | mag | double | HE band template-fit AB magnitude (from flux_h_templfit) |
| 21 | magerr_h_templfit | mag | double | Error on HE band template-fit AB magnitude |
Notes. The catalogue described by Table B.1 is available in its entirety at the CDS.
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