Southern Sample: Master File Format

Byte-by-byte Description of file:

Field (Column) Bytes Format Units Label Explanations

1 1- 18 A18 --- SDSS SDSS DR5 Object Designation (1)

2 20- 29 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)

3 31- 40 F10.6 deg DEdeg Declination in decimal degrees (J2000)

4 42- 47 F6.4 --- z Redshift

5 49- 54 F6.3 mag B-umag SDSS BEST u band PSF magnitude (2)

6 56- 60 F5.3 mag e_B-umag Error in B-umag

7 62- 67 F6.3 mag B-gmag SDSS BEST g band PSF magnitude (2)

8 69- 73 F5.3 mag e_B-gmag Error in B-gmag

9 75- 80 F6.3 mag B-rmag SDSS BEST r band PSF magnitude (2)

10 82- 86 F5.3 mag e_B-rmag Error in B-rmag

11 88- 93 F6.3 mag B-imag SDSS BEST i band PSF magnitude (2)

12 95- 99 F5.3 mag e_B-imag Error in B-imag

13 101-106 F6.3 mag B-zmag SDSS BEST z band PSF magnitude (2)

14 108-112 F5.3 mag e_B-zmag Error in B-zmag

15 114-119 F6.3 mag Au Galactic absorption in u band (3)

16 121-126 F6.3 [cm-2] logHI Log of Galactic HI column density

17 128-133 F6.3 mag 20mag FIRST Peak flux density (AB mag) at 20 cm (4)

18 135-141 F7.3 --- F-S/N The S/N ratio for FIRST flux

19 143-148 F6.3 arcsec S-FSep SDSS/FIRST separation

20 150-151 I2 --- F1Flag FIRST flux at optical position but no FIRST source flag (5)

21 153-154 I2 --- F2Flag FIRST source 2-30" from optical position flag (6)

22 156-162 F7.3 [ct/s] logX log of RASS BSC/FSC full band count rate (7)

23 164-169 F6.3 --- X-S/N The S/N ratio for RASS count rate

24 171-176 F6.3 arcsec S-XSep SDSS/RASS separation

25 178-183 F6.3 mag Jmag 2MASS J band magnitude (8)

26 185-189 F5.3 mag e_Jmag Error in Jmag

27 191-196 F6.3 mag Hmag 2MASS H band magnitude (8)

28 198-202 F5.3 mag e_Hmag Error in Hmag

29 204-209 F6.3 mag Kmag 2MASS K band magnitude (8)

30 211-215 F5.3 mag e_Kmag Error in Kmag

31 217-222 F6.3 arcsec S-2Sep SDSS/2MASS separation

32 224-230 F7.3 mag iMag Absolute i band magnitude (9)

33 232-237 F6.3 mag D(g-i) Offset of quasar (g-i) from distribution (g-i) mode (10)

34 239-240 I2 --- Morph Morphology flag (11)

35 242-243 I2 --- SPFlag SCIENCEPRIMARY flag (12)

36 245-246 I2 --- SMFlag SDSS MODE (blends, overlapping scans) flag (13)

37 248-249 I2 --- UTSFlag Uniform target selection flag (14)

38 251-261 I11 --- B-TSFlag BEST target selection flag

39 263-264 I2 --- B-lowz Low-z Quasar (color selection only) target flag (15)

40 266-267 I2 --- B-hiz High-z Quasar (color selection only) target flag (15)

41 269-270 I2 --- B-FFlag FIRST target flag (16)

42 272-273 I2 --- B-RFlag ROSAT target flag (16)

43 275-276 I2 --- B-SFlag Serendipity target flag (16)

44 278-279 I2 --- B-*Flag Star target flag (16)

45 281-282 I2 --- B-GFlag Galaxy target flag (16)

46 284-288 I5 --- RNum SDSS Imaging Run Number for photometric measurements

47 290-294 I5 d P-MJD Modified Julian Date of imaging observation

48 296-300 I5 d S-MJD Modified Julian Date of spectroscopic observatio

49 302-305 I4 --- SPNum Spectroscopic Plate Number

50 307-310 I4 --- SFNum Spectroscopic Fiber Number

51 312-314 I3 --- Rerun SDSS Photometric Processing Rerun Number

52 316-317 I2 --- CCol SDSS Camera Column Number

53 319-322 I4 --- Frame SDSS Frame Number

54 324-327 I4 --- ONum SDSS Object Number

55 329-339 I11 --- T-TSFlag TARGET target selection flag

56 341-342 I2 --- T-lowz Low-z Quasar (color selection only) target flag(15)

57 344-345 I2 --- T-hiz High-z Quasar (color selection only) target flag(15)

58 347-348 I2 --- T-FFlag FIRST target flag (16)

59 350-351 I2 --- T-RFlag ROSAT target flag (16)

60 353-354 I2 --- T-SFlag Serendipity target flag (16)

61 356-357 I2 --- T-*Flag Star target flag (16)

62 359-360 I2 --- T-GFlag Galaxy target flag (16)

63 362-367 F6.3 mag T-umag SDSS TARGET u band PSF magnitude (2)

64 369-373 F5.3 mag e_T-umag Error in T-umag

65 375-380 F6.3 mag T-gmag SDSS TARGET g band PSF magnitude (2)

66 382-386 F5.3 mag e_T-gmag Error in T-gmag

67 388-393 F6.3 mag T-rmag SDSS TARGET r band PSF magnitude (2)

68 395-399 F5.3 mag e_T-rmag Error in T-rmag

69 401-406 F6.3 mag T-imag SDSS TARGET i band PSF magnitude (2)

70 408-412 F5.3 mag e_T-imag Error in T-imag

71 414-419 F6.3 mag T-zmag SDSS TARGET z band PSF magnitude (2)

72 421-425 F5.3 mag e_T-zmag Error in T-zmag

73 427-446 I20 --- SpOID The 64-bit integer Spectroscopic Identification flag

74 448-472 A25 --- OName Object Name if previously published (17)

Note (1): In the hhmmss.ss+ddmmss.s (J2000; truncated coordinates) format.
Note (2): SDSS photometric measurements are asinh magnitudes (Lupton, Gunn,
and Szalay 1999, AJ, 118, 1406) and are normalized (to ~3% accuracy)
to the AB-magnitude system (Oke and Gunn 1983, ApJ, 266, 713). Note
that the ugriz magnitudes are not corrected for Galactic absorption.
A "0.000" indicates that the value couldn't be retrieved from
the SDSS database.
Note (3): Where A_g, A_r, A_i, A_z = 0.736, 0.534, 0.405, 0.287 x A_u.
Note (4): Where AB mag = -2.5 log₁₀ [f_&nu / 3631 Jy]. Values of "0.000"
or "-1.000" indicate no detection and not in FIRST survey
area, respectively.
Note (5):
0 = no detectable flux;
1 = detectable flux.
Note (6):
0 = no such source;
1 = source exists.
Note (7): From ROSAT All Sky Survey Bright and Faint source catalogs.
A "-9.000" indicates no detection.
Note (8): All 2MASS data are from the 2MASS All-Sky Data Release Point Source
Catalog (PSC) 2003 March 25. Note that 2MASS measurements are
Vega-based, not AB, magnitudes. A "0.000" value indicates
no detection.
Note (9): For H_o = 70.0, {Omega}_M = 0.300, {Omega}_L = 0.700,
{alpha}_Q = -0.50.
Note (10): Of quasars at this redshift. A value of -9.0 indicates too few
quasars at redshift to form mean relation. All colors corrected
for Galactic extinction.
Note (11):
0 = point source;
1 = extended.
Note (12):
0 = Object is not SCIENCEPRIMARY;
1 = Object is SCIENCEPRIMARY.
Note (13):
1 = Primary object;
2 = Secondary observation;
3 = Family observation.
Note (14):
0 = not selected with final algorithm;
1 = selected with final algorithm.
Note (15):
0 = not targeted as low/high-z quasar;
1 = targeted as low/high-z quasar.
Note (16):
0 = not targeted;
1 = targeted.
Note (17): An "SDSS" in this column indicates that the object is a previously
published SDSS discovery.

Field (Column)	Bytes	Format	Units	Label	Explanations
1	1- 18	A18	---	SDSS	SDSS DR5 Object Designation (1)
2	20- 29	F10.6	deg	RAdeg	Right Ascension in decimal degrees (J2000)
3	31- 40	F10.6	deg	DEdeg	Declination in decimal degrees (J2000)
4	42- 47	F6.4	---	z	Redshift
5	49- 54	F6.3	mag	B-umag	SDSS BEST u band PSF magnitude (2)
6	56- 60	F5.3	mag	e_B-umag	Error in B-umag
7	62- 67	F6.3	mag	B-gmag	SDSS BEST g band PSF magnitude (2)
8	69- 73	F5.3	mag	e_B-gmag	Error in B-gmag
9	75- 80	F6.3	mag	B-rmag	SDSS BEST r band PSF magnitude (2)
10	82- 86	F5.3	mag	e_B-rmag	Error in B-rmag
11	88- 93	F6.3	mag	B-imag	SDSS BEST i band PSF magnitude (2)
12	95- 99	F5.3	mag	e_B-imag	Error in B-imag
13	101-106	F6.3	mag	B-zmag	SDSS BEST z band PSF magnitude (2)
14	108-112	F5.3	mag	e_B-zmag	Error in B-zmag
15	114-119	F6.3	mag	Au	Galactic absorption in u band (3)
16	121-126	F6.3	[cm-2]	logHI	Log of Galactic HI column density
17	128-133	F6.3	mag	20mag	FIRST Peak flux density (AB mag) at 20 cm (4)
18	135-141	F7.3	---	F-S/N	The S/N ratio for FIRST flux
19	143-148	F6.3	arcsec	S-FSep	SDSS/FIRST separation
20	150-151	I2	---	F1Flag	FIRST flux at optical position but no FIRST source flag (5)
21	153-154	I2	---	F2Flag	FIRST source 2-30" from optical position flag (6)
22	156-162	F7.3	[ct/s]	logX	log of RASS BSC/FSC full band count rate (7)
23	164-169	F6.3	---	X-S/N	The S/N ratio for RASS count rate
24	171-176	F6.3	arcsec	S-XSep	SDSS/RASS separation
25	178-183	F6.3	mag	Jmag	2MASS J band magnitude (8)
26	185-189	F5.3	mag	e_Jmag	Error in Jmag
27	191-196	F6.3	mag	Hmag	2MASS H band magnitude (8)
28	198-202	F5.3	mag	e_Hmag	Error in Hmag
29	204-209	F6.3	mag	Kmag	2MASS K band magnitude (8)
30	211-215	F5.3	mag	e_Kmag	Error in Kmag
31	217-222	F6.3	arcsec	S-2Sep	SDSS/2MASS separation
32	224-230	F7.3	mag	iMag	Absolute i band magnitude (9)
33	232-237	F6.3	mag	D(g-i)	Offset of quasar (g-i) from distribution (g-i) mode (10)
34	239-240	I2	---	Morph	Morphology flag (11)
35	242-243	I2	---	SPFlag	SCIENCEPRIMARY flag (12)
36	245-246	I2	---	SMFlag	SDSS MODE (blends, overlapping scans) flag (13)
37	248-249	I2	---	UTSFlag	Uniform target selection flag (14)
38	251-261	I11	---	B-TSFlag	BEST target selection flag
39	263-264	I2	---	B-lowz	Low-z Quasar (color selection only) target flag (15)
40	266-267	I2	---	B-hiz	High-z Quasar (color selection only) target flag (15)
41	269-270	I2	---	B-FFlag	FIRST target flag (16)
42	272-273	I2	---	B-RFlag	ROSAT target flag (16)
43	275-276	I2	---	B-SFlag	Serendipity target flag (16)
44	278-279	I2	---	B-*Flag	Star target flag (16)
45	281-282	I2	---	B-GFlag	Galaxy target flag (16)
46	284-288	I5	---	RNum	SDSS Imaging Run Number for photometric measurements
47	290-294	I5	d	P-MJD	Modified Julian Date of imaging observation
48	296-300	I5	d	S-MJD	Modified Julian Date of spectroscopic observatio
49	302-305	I4	---	SPNum	Spectroscopic Plate Number
50	307-310	I4	---	SFNum	Spectroscopic Fiber Number
51	312-314	I3	---	Rerun	SDSS Photometric Processing Rerun Number
52	316-317	I2	---	CCol	SDSS Camera Column Number
53	319-322	I4	---	Frame	SDSS Frame Number
54	324-327	I4	---	ONum	SDSS Object Number
55	329-339	I11	---	T-TSFlag	TARGET target selection flag
56	341-342	I2	---	T-lowz	Low-z Quasar (color selection only) target flag(15)
57	344-345	I2	---	T-hiz	High-z Quasar (color selection only) target flag(15)
58	347-348	I2	---	T-FFlag	FIRST target flag (16)
59	350-351	I2	---	T-RFlag	ROSAT target flag (16)
60	353-354	I2	---	T-SFlag	Serendipity target flag (16)
61	356-357	I2	---	T-*Flag	Star target flag (16)
62	359-360	I2	---	T-GFlag	Galaxy target flag (16)
63	362-367	F6.3	mag	T-umag	SDSS TARGET u band PSF magnitude (2)
64	369-373	F5.3	mag	e_T-umag	Error in T-umag
65	375-380	F6.3	mag	T-gmag	SDSS TARGET g band PSF magnitude (2)
66	382-386	F5.3	mag	e_T-gmag	Error in T-gmag
67	388-393	F6.3	mag	T-rmag	SDSS TARGET r band PSF magnitude (2)
68	395-399	F5.3	mag	e_T-rmag	Error in T-rmag
69	401-406	F6.3	mag	T-imag	SDSS TARGET i band PSF magnitude (2)
70	408-412	F5.3	mag	e_T-imag	Error in T-imag
71	414-419	F6.3	mag	T-zmag	SDSS TARGET z band PSF magnitude (2)
72	421-425	F5.3	mag	e_T-zmag	Error in T-zmag
73	427-446	I20	---	SpOID	The 64-bit integer Spectroscopic Identification flag
74	448-472	A25	---	OName	Object Name if previously published (17)

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