The Sloan Digital Sky Survey Quasar Catalog: Twelfth data release

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Volume 597 (January 2017)

A&A, 597 (2017) A79

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Table C.1

DR12Q catalog format.

Column	Name	Format	Description^a

1	SDSS_NAME	STRING	SDSS-DR12 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	Thing_ID (unique identifier of SDSS sources)
5	PLATE	INT32	Spectroscopic Plate number
6	MJD	INT32	Spectroscopic MJD
7	FIBERID	INT32	Spectroscopic Fiber number

8	Z_VI	DOUBLE	Redshift from visual inspection
9	Z_PIPE	DOUBLE	Redshift from BOSS pipeline
10	ERR_ZPIPE	DOUBLE	Error on BOSS pipeline redshift
11	ZWARNING	INT32	ZWARNING flag
12	Z_PCA	DOUBLE	Refined PCA redshift
13	ERR_ZPCA	DOUBLE	Error on refined PCA redshift
14	PCA_QUAL	DOUBLE	Estimator of the PCA continuum quality
15	Z_CIV	DOUBLE	Redshift of C iv emission line
16	Z_CIII	DOUBLE	Redshift of C iii] emission complex
17	Z_MGII	DOUBLE	Redshift of Mg ii emission line

18	SDSS_MORPHO	INT32	SDSS morphology flag 0 = point source 1 = extended
19	BOSS_TARGET1	INT64	BOSS target flag for main survey
20	ANCILLARY_TARGET1	INT64	BOSS target flag for ancillary programs
21	ANCILLARY_TARGET2	INT64	BOSS target flag for ancillary programs
22	EBOSS_TARGET0	INT64	Target selection flag for the SDSS-IV/eBOSS pilot survey
23	NSPEC_BOSS	INT32	Number of additional spectra available in SDSS-III/BOSS
24	PLATE_DUPLICATE	INT32[32]	Spectroscopic plate number for each duplicate spectrum
25	MJD_DUPLICATE	INT32[32]	Spectroscopic MJD for each duplicate spectrum
26	FIBERID_DUPLICATE	INT32[32]	Spectroscopic fiber number for each duplicate spectrum
27	SDSS_DR7	INT32	1 if the quasar is known from DR7
28	PLATE_DR7	INT32	SDSS-DR7 spectroscopic Plate number if the quasar is known from DR7
29	MJD_DR7	INT32	SDSS-DR7 spectroscopic MJD if the quasar is known from DR7
30	FIBERID_DR7	INT32	SDSS-DR7 spectroscopic Fiber number if the quasar is known from DR7
31	UNIFORM	INT32	Uniform sample flag
32	ALPHA_NU	FLOAT	Spectral index measurement α_ν

33	SNR_SPEC	FLOAT	Median signal-to-noise ratio over the whole spectrum
34	SNR_DUPLICATE	FLOAT[32]	Median signal-to-noise ratio over the whole spectrum of duplicate
			SDSS-III/BOSS spectra when available
35	SNR_1700	FLOAT	Median signal-to-noise ratio in the window 1650–1750 Å (rest frame)
36	SNR_3000	FLOAT	Median signal-to-noise ratio in the window 2950–3050 Å (rest frame)
37	SNR_5150	FLOAT	Median signal-to-noise ratio in the window 5100–5250 Å (rest frame)
38	FWHM_CIV	DOUBLE	FWHM of C iv emission line in km s^-1
39	BHWHM_CIV	DOUBLE	Blue HWHM of C iv emission line in km s^-1
40	RHWHM_CIV	DOUBLE	Red HWHM of C iv emission line in km s^-1
41	AMP_CIV	DOUBLE	Amplitude of C iv emission line in units of median rms pixel noise
42	REWE_CIV	DOUBLE	Rest frame equivalent width of C iv emission line in Å
43	ERR_REWE_CIV	DOUBLE	Uncertainty on the rest frame equivalent width of C iv emission line in Å
44	FWHM_CIII	DOUBLE	FWHM of C iii] emission complex in km s^-1
45	BHWHM_CIII	DOUBLE	Blue HWHM of C iii] emission line in km s^-1
46	RHWHM_CIII	DOUBLE	Red HWHM of C iii] emission line in km s^-1
47	AMP_CIII	DOUBLE	Amplitude of C iii] emission complex in units of median rms pixel noise
48	REWE_CIII	DOUBLE	Rest frame equivalent width of C iii] emission line in Å
49	ERR_REWE_CIII	DOUBLE	Uncertainty on the rest frame equivalent width of C iii] emission
			complex in Å
50	FWHM_MGII	DOUBLE	FWHM of Mg ii emission line in km s^-1
51	BHWHM_MGII	DOUBLE	Blue HWHM of Mg ii emission line in km s^-1
52	RHWHM_MGII	DOUBLE	Red HWHM of Mg ii emission line in km s^-1
53	AMP_MGII	DOUBLE	Amplitude of Mg ii emission line in units of median rms pixel noise
54	REWE_MGII	DOUBLE	Rest frame equivalent width of Mg ii emission line in Å
55	ERR_REWE_MGII	DOUBLE	Uncertainty on the rest frame equivalent width of Mg ii emission in Å

56	BAL_FLAG_VI	INT32	BAL flag from visual inspection
57	BI_CIV	DOUBLE	Balnicity index of C iv trough (in km s^-1)
58	ERR_BI_CIV	DOUBLE	Error on the Balnicity index of C iv trough (in km s^-1)
59	AI_CIV	DOUBLE	Absorption index of C iv trough (in km s^-1)
60	ERR_AI_CIV	DOUBLE	Error on the absorption index of C iv trough (in km s^-1)
61	CHI2THROUGH	DOUBLE	χ² of the trough from Eq. (3) in Pâris et al. (2012)
62	NCIV_2000	INT32	Number of distinct C iv troughs of width larger than 2000 km s^-1
63	VMIN_CIV_2000	DOUBLE	Minimum velocity of the C iv troughs defined in row 57 (km s^-1)
64	VMAX_CIV_2000	DOUBLE	Maximum velocity of the C iv troughs defined in row 57 (in km s^-1)
65	NCIV_450	INT32	Number of distinct C iv troughs of width larger than 450 km s^-1
66	VMIN_CIV_450	DOUBLE	Minimum velocity of the C iv troughs defined in row 59 (in km s^-1)
67	VMAX_CIV_450	DOUBLE	Maximum velocity of the C iv troughs defined in row 59 (in km s^-1)
68	REW_SIIV	DOUBLE	rest frame equivalent width of the Si iv trough
69	REW_CIV	DOUBLE	rest frame equivalent width of the C iv trough
70	REW_ALIII	DOUBLE	rest frame equivalent width of the Al iii] trough

71	RUN_NUMBER	INT32	SDSS Imaging Run Number of photometric measurements
72	PHOTO_MJD	INT32	Modified Julian Date of imaging observation
73	RERUN_NUMBER	STRING	SDSS Photometric Processing Rerun Number
74	COL_NUMBER	INT32	SDSS Camera Column Number (1–6)
75	FIELD_NUMBER	INT32	SDSS Field Number
76	OBJ_ID	STRING	SDSS Object Identification Number
77	PSFFLUX	FLOAT[5]	flux in the u, g, r, i and z-bands (not corrected for Galactic extinction)
78	IVAR_PSFLUX	FLOAT[5]	inverse variance of u, g, r, i and z fluxes
79	PSFMAG	FLOAT[5]	PSF magnitudes in u, g, r, i and z-bands (not corrected for Galactic
			extinction)
80	ERR_PSFMAG	FLOAT[5]	error in u, g, r, i and z PSF magnitudes
81	TARGET_FLUX	FLOAT[5]	TARGET flux in the u, g, r, i and z-bands (not corrected for Galactic
			extinction)
82	MI	FLOAT
83	DGMI	FLOAT	Δ(g−i) = (g−i)− ⟨ (g−i) ⟩ _redshift (Galactic extinction corrected)
84	GAL_EXT	FLOAT[5]	Galactic extinction in the 5 SDSS bands from Schlegel et al. (1998)
85	GAL_EXT_RECAL	FLOAT[5]	Galactic extinction in the 5 SDSS bands from Schlafly & Finkbeiner (2011)
86	HI_GAL	FLOAT	log N_H (logarithm of Galactic H i column density in cm^-2)

87	VAR_MATCHED	SHORT	Flag for variability information (0 if not available)
88	VAR_CHI2	DOUBLE	Reduced χ² when the light curve is fit with a constant
89	VAR_A	DOUBLE	Structure function parameter A as defined
			in Palanque-Delabrouille et al. (2011)
90	VAR_GAMMA	DOUBLE	Structure function parameter γ as defined
			in Palanque-Delabrouille et al. (2011)

91	RASS_COUNTS	DOUBLE	log RASS full band count rate (counts s^-1)
92	RASS_COUNTS_SNR	FLOAT	S/N of the RASS count rate
93	SDSS2ROSAT_SEP	DOUBLE	SDSS-RASS separation in arcsec
94	N_DETECTION_XMM	INT32	Number of detections in XMM-Newton
95	FLUX02_12KEV_SGL	DOUBLE	Total flux (0.2–12 keV) from XMM-Newton computed from the longest
			observation (erg cm^-2 s^-1)
96	ERR_FLUX02_12KEV_SGL	DOUBLE	Error in total flux (0.2–12 keV) from XMM-Newton
97	FLUX02_2KEV	DOUBLE	Soft (0.2–2 keV) X-ray flux from XMM-Newton (erg cm^-2 s^-1)
98	ERR_FLUX02_2KEV	DOUBLE	Error in soft (0.2–2 keV) X-ray flux from XMM-Newton (erg cm^-2 s^-1)
99	FLUX45_12KEV	DOUBLE	Hard (4.5–12 keV) X-ray flux from XMM-Newton (erg cm^-2 s^-1)
100	ERR_FLUX45_12KEV	DOUBLE	Error in hard (4.5–12 keV) X-ray flux from XMM-Newton (erg cm^-2 s^-1)
101	FLUX02_12KEV	DOUBLE	Total weighted average flux (0.2–12 keV) from XMM-Newton (erg cm^-2 s^-1)
102	ERR_FLUX02_12KEV	DOUBLE	Error in total flux (0.2–12 keV) from XMM-Newton
103	LUM02_12KEV_SGL	DOUBLE	Total X-ray luminosity (0.2–12 keV) from XMM-Newton using the
			longest observation (erg s^-1) using Z_VI and H₀ = 70 km s^-1 Mpc^-1,
			Ω_M = 0.3, Ω_Λ = 0.7
104	LUM05_2KEV	DOUBLE	Soft (0.2–2 keV) X-ray luminosity from XMM-Newton (erg s^-1)
			using Z_VI and H₀ = 70 km s^-1 Mpc^-1, Ω_M = 0.3, Ω_Λ = 0.7
105	LUM45_12KEV	DOUBLE	Hard (4.5–12 keV) X-ray luminosity from XMM-Newton (erg s^-1)
			using Z_VI and H₀ = 70 km s^-1 Mpc^-1, Ω_M = 0.3, Ω_Λ = 0.7
106	LUM2_12KEV	DOUBLE	Total X-ray luminosity (0.2–12 keV) from XMM-Newton using weighted
			average flux (erg s^-1) using Z_VI and H₀ = 70 km s^-1 Mpc^-1, Ω_M = 0.3,
			Ω_Λ = 0.7
107	LUMX2_10_UPPER	DOUBLE	Flag for upper limit of hard X-ray flux (in col. #95)
108	SDSS2XMM_SEP	DOUBLE	SDSS-XMM-Newton separation in arcsec
109	GALEX_MATCHED	SHORT	GALEX match
110	FUV	DOUBLE	fuv flux (GALEX)
111	FUV_IVAR	DOUBLE	Inverse variance of fuv flux
112	NUV	DOUBLE	nuv flux (GALEX)
113	NUV_IVAR	DOUBLE	Inverse variance of nuv flux
114	JMAG	DOUBLE	J magnitude (Vega, 2MASS)
115	ERR_JMAG	DOUBLE	Error in J magnitude
116	JSNR	DOUBLE	J-band S/N
117	JRDFLAG	INT32	J-band photometry flag
118	HMAG	DOUBLE	H magnitude (Vega, 2MASS)
119	ERR_HMAG	DOUBLE	Error in H magnitude
120	HSNR	DOUBLE	H-band S/N
121	HRDFLAG	INT32	H-band photometry flag
122	KMAG	DOUBLE	K magnitude (Vega, 2MASS)
123	ERR_KMAG	DOUBLE	Error in K magnitude
124	KSNR	DOUBLE	K-band S/N
125	KRDFLAG	INT32	K-band photometry flag
126	SDSS2MASS_SEP	DOUBLE	SDSS-2MASS separation in arcsec
127	W1MAG	DOUBLE	w1 magnitude (Vega, WISE)
128	ERR_W1MAG	DOUBLE	Error in w1 magnitude
129	W1SNR	DOUBLE	S/N in w1 band
130	W1CHI2	DOUBLE	χ² in w1 band
131	W2MAG	DOUBLE	w2 magnitude (Vega, WISE)
132	ERR_W2MAG	DOUBLE	Error in w2 magnitude
133	W2SNR	DOUBLE	S/N in w2 band
134	W2CHI2	DOUBLE	χ² in w2 band
135	W3MAG	DOUBLE	w3 magnitude (Vega, WISE)
136	ERR_W3MAG	DOUBLE	Error in w3 magnitude
137	W3SNR	DOUBLE	S/N in w3 band
138	W3CHI2	DOUBLE	χ² in w3 band
139	W4MAG	DOUBLE	w4 magnitude (Vega, WISE)
140	ERR_W4MAG	DOUBLE	Error in w4 magnitude
141	W4SNR	DOUBLE	S/N in w4 band
142	W4CHI2	DOUBLE	χ² in w4 band
143	CC_FLAGS	STRING	WISE contamination and confusion flag
144	PH_FLAG	STRING	WISE photometric quality flag
145	SDSS2WISE_SEP	DOUBLE	SDSS-WISE separation in arcsec
146	UKIDSS_MATCHED	SHORT	UKIDSS Matched
147	YFLUX	DOUBLE	Y-band flux density from UKIDSS (in W m^-2 Hz^-1)
148	YFLUX_ERR	DOUBLE	Error in Y-band density flux from UKIDSS (in W m^-2 Hz^-1)
149	JFLUX	DOUBLE	J-band flux density from UKIDSS (in W m^-2 Hz^-1)
150	JFLUX_ERR	DOUBLE	Error in J-band flux density from UKIDSS (in W m^-2 Hz^-1)
151	HFLUX	DOUBLE	H-band flux density from UKIDSS (in W m^-2 Hz^-1)
152	HFLUX_ERR	DOUBLE	Error in H-band flux density from UKIDSS (in W m^-2 Hz^-1)
153	KFLUX	DOUBLE	K-band flux density from UKIDSS (in W m^-2 Hz^-1)
154	KFLUX_ERR	DOUBLE	Error in K-band flux density from UKIDSS (in W m^-2 Hz^-1)
155	FIRST_MATCHED	INT	FIRST matched
156	FIRST_FLUX	DOUBLE	FIRST peak flux density at 20 cm expressed in mJy
157	FIRST_SNR	DOUBLE	S/N of the FIRST flux density
158	SDSS2FIRST_SEP	DOUBLE	SDSS-FIRST separation in arcsec

Notes.

^(a)

All magnitudes are PSF magnitudes.

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