Northern Sample: Mag File Format

Field (Column) Format Units Label Explanations
1 I6 --- SDR7ID Row of Schneider catalog (out of 105783) corresponding to that QSO
2 F7.3 mag M_i Absolute i band magnitude (same as "iMag" in master file) (8)
3 F6.4 --- redshift Redshift
4 F6.3 [Msun]logMBH Black hole mass ('0.000' means none could be found) (7)
5 F6.3 [ergs/s]logLbol Bolometric luminosity (7)
6 F6.3 mag Au Galactic extinction in u filter (3)
7 F7.3 mag F20 FIRST Peak 20 cm flux density (4)
8 F8.3 --- q_F20 Signal-to-noise ratio for F20
9 F8.3 [ct/s]logCR RASS BSC/FSC full band count rate (5)
10 F7.3 --- q_logCR Signal-to-noise ratio for logCR
11 F7.3 mag Jmag 2MASS J band magnitude (6)
12 F6.3 mag e_Jmag Error in Jmag
13 F7.3 mag Hmag 2MASS H band magnitude (6)
14 F6.3 mag e_Hmag Error in Hmag
15 F7.3 mag Kmag 2MASS K band magnitude (6)
16 F6.3 mag e_Kmag Error in Kmag
17 I3 --- Nobs Total number of observations
18 I1 --- S82flag Flag for Stripe 82 object (1)
19F9.3 days MJD_r Modified Julian Date of r-band imaging observation (9)
20 F6.3 mag u_PSF BEST SDSS u band PSF magnitude (2)
21 F6.3 mag u_err Error in u_PSF
22 F6.3 mag g_PSF BEST SDSS g band PSF magnitude (2)
23 F6.3 mag g_err Error in g_PSF
24 F6.3 mag r_PSF BEST SDSS r band PSF magnitude (2)
25 F6.3 mag r_err Error in r_PSF
26 F6.3 mag i_PSF BEST SDSS i band PSF magnitude (2)
27 F6.3 mag i_err Error in i_PSF
28 F6.3 mag z_PSF BEST SDSS z band PSF magnitude (2)
29 F6.3 mag z_err Error in z_PSF
... Fields 19 through 29 repeated for each additional observation ...

Note (1):
    0 = not in SDSS Stripe 82;
    1 = has Stripe 82 light curve.
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).
    Uncorrected for Galactic extinction. A 0.000 indicates that the
    value couldn't be retrieved from the SDSS database.
Note (3): Where Ag, Ar, Ai, Az = 0.736, 0.534, 0.405, 0.287 x Au.
Note (4): As AB magnitude where AB mag = -2.5 log10 [f&nu / 3631 Jy].
    0.000 = no detection;
    -1.000 = not in FIRST survey area.
Note (5): X-ray data from ROSAT All Sky Survey Bright and Faint source catalogs
    -9.000 = no detection.
Note (6): 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.
    0.000 = no detection.
Note (7): Taken from the Shen et al. (2011) catalog.
Note (8): For Ho = 70.0, ΩM = 0.300, ΩL = 0.700, αQ = -0.50.
Note (9): The MJD of the primary observation will be rounded to the nearest day
    for some Stripe 82 QSOs if the primary observation (as listed in the
    DR7 QSO Catalog) is at least a day earlier than the earliest Stripe 82 observation.
    Otherwise, the MJD should be accurate to 0.001 day precision.

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