The Sloan Digital Sky Survey Quasar Catalog: Fourteenth data release

Open Access

Table A.1

Format of the binary FITS table containing DR14Q.

Column	Name	Format	Description
1	SDSS_NAME	STRING	SDSS-DR14 designation – hhmmss.ss+ddmmss.s (J2000)
2	RA	DOUBLE	Right Ascension in decimal degrees (J2000)
3	DEC	DOUBLE	Declination in decimal degrees (J2000)
4	THING_ID	INT32	Unique SDSS source identifier
5	PLATE	INT32	Spectroscopic plate number
6	MJD	INT32	Modified Julian Day of the spectroscopic
			observation
7	FIBERID	INT32	Spectroscopic fiber number
8	SPECTRO	STRING	SDSS or BOSS

9	Z	DOUBLE	Redshift (most robust estimate for each quasar)
10	Z_ERR	DOUBLE	Error on redshift given in Col. #9
11	SOURCE_Z	STRING	Origin of the redshift measurement in Col. #9
			(VI, PIPE, AUTO, OTHER)
12	Z_VI	DOUBLE	Redshift based on visual inspection (when
			available)
13	Z_PIPE	DOUBLE	SDSS pipeline redshift estimate
14	Z_PIPE_ERR	DOUBLE	Error on SDSS pipeline redshift estimate
15	ZWARNING	INT32	Quality flag on SDSS pipeline redshift estimate
16	Z_PCA	DOUBLE	PCA redshift (homogeneous over the full sample)
17	Z_PCA_ERR	DOUBLE	Error on PCA redshift
18	Z_MGII	DOUBLE	Redshift of the Mg II emission line

19	BOSS_TARGET1	INT64	BOSS target selection flag for main survey
20	ANCILLARY_TARGET1	INT64	BOSS target selection flag for ancillary programs
21	ANCILLARY_TARGET2	INT64	BOSS target selection flag for ancillary programs
22	EBOSS_TARGET0	INT64	Target selection flag for the eBOSS pilot survey
23	EBOSS_TARGET1	INT64	eBOSS target selection flag
24	EBOSS_TARGET2	INT64	eBOSS target selection flag

25	N_SPEC_SDSS	INT32	Number of additional SDSS spectra
26	N_SPEC_BOSS	INT32	Number of additional BOSS spectra
27	N_SPEC	INT32	Number of additional spectra (SDSS and BOSS)
28	PLATE_DUPLICATE	INT32[51]	Spectroscopic plate number for each duplicate
			spectrum
29	MJD_DUPLICATE	INT32[51]	Spectroscopic MJD for each duplicate spectrum
30	FIBERID_DUPLICATE	INT32[51]	Fiber number for each duplicate spectrum
31	SPECTRO_DUPLICATE	STRING[51]	SDSS or BOSS for each duplicate spectrum

32	BI_CIV	FLOAT	BALnicity Index of C IV absorption trough (in km s⁻¹)
33	ERR_BI_CIV	FLOAT	Error on the BALnicity Index of C IV trough (in km s⁻¹)

34	RUN_NUMBER	INT32	SDSS Imaging Run Number of photometric measurements
35	RERUN_NUMBER	STRING	SDSS Photometric Processing Rerun Number
36	COL_NUMBER	INT32	SDSS Camera Column Number (1–6)
37	FIELD_NUMBER	INT32	SDSS Field Number
38	OBJ_ID	STRING	SDSS Object Identification Number
39	PSFFLUX	FLOAT[5]	Flux in the u, g, r, i and z bands
40	IVAR_IVAR	FLOAT[5]	Inverse variance of the u, g, r, i and z fluxes
41	PSFMAG	FLOAT[5]	PSF magnitudes in u, g, r, i and z bands
42	ERR_PSFMAG	FLOAT[5]	Error on PSF magnitudes
43	MI	FLOAT	Absolute magnitude in i band with
			H₀ = 70 km s⁻¹ Mpc⁻¹, Ω_M = 0.3, Ω_Λ = 0.7,
			α_ν = −0.5
44	GAL_EXT	FLOAT[5]	Galactic extinction in the five SDSS bands
			(Schlafly & Finkbeiner 2011)

45	RASS_COUNTS	DOUBLE	log RASS full band count rate (counts s⁻¹)
46	RASS_COUNTS_SNR	FLOAT	S/N of the RASS count rate
47	SDSS2ROSAT_SEP	DOUBLE	SDSS-RASS separation in arcsec

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