#Sloan Digital Sky Survey Quasar Catalog V. Data Release 7 Creation Date: 30 Mar 2010 # #Column C1 C2 Format Description # 1 1 18 A18 DR7 Object Designation hhmmss.ss+ddmmss.s (J2000; truncated coordinates) # 2 19 29 F11.6 R.A.(J2000) in degrees # 3 30 40 F11.6 Dec.(J2000) in degrees # 4 41 47 F7.4 Redshift # 5 48 54 F7.3 u PSF magnitude 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) # 6 55 60 F6.3 error in u PSF magnitude Note that the ugriz magnitudes are not corrected for Galactic absorption. # 7 61 67 F7.3 g PSF magnitude All measurements in columns 5-14 are from BEST processing if available. 0.000 ==> cannot retrieve value from SDSS database # 8 68 73 F6.3 g PSF magnitude error # 9 74 80 F7.3 r PSF magnitude # 10 81 86 F6.3 r PSF magnitude error # 11 87 93 F7.3 i PSF magnitude # 12 94 99 F6.3 i PSF magnitude error # 13 100 106 F7.3 z PSF magnitude # 14 107 112 F6.3 z PSF magnitude error # 15 113 119 F7.3 Galactic absorption in u band (magnitudes) A_g, A_r, A_i, A_z = 0.736, 0.534, 0.405, 0.287 x A_u # 16 120 126 F7.3 log [Galactic HI column density] # 17 127 133 F7.3 FIRST Peak flux density (AB mag) at 20 cm (AB mag = -2.5 log_10 [f_nu / 3631 Jy]) 0.000 ==> no detection -1.000 ==> not in FIRST survey area # 18 134 141 F8.3 S/N ratio for FIRST flux # 19 142 148 F7.3 SDSS/FIRST separation (arc seconds) # 20 149 156 F8.3 log RASS BSC/FSC full band count rate (counts/second) -9.000 ==> no detection X-ray data from ROSAT All Sky Survey Bright and Faint source catalogs # 21 157 163 F7.3 S/N ratio for RASS count rate # 22 164 170 F7.3 SDSS/RASS separation (arc seconds) # 23 171 177 F7.3 2MASS J magnitude All 2MASS data are from the 2MASS All-Sky Data Release Point Source Catalog (PSC) 2003 March 25 0.000 ==> no detection # 24 178 183 F6.3 2MASS J magnitude error ** Note that 2MASS measurements are Vega-based, not AB, magnitudes ** # 25 184 190 F7.3 2MASS H magnitude # 26 191 196 F6.3 2MASS H magnitude error # 27 197 203 F7.3 2MASS K magnitude # 28 204 209 F6.3 2MASS K magnitude error # 29 210 216 F7.3 SDSS/2MASS separation (arc seconds) # 30 217 219 I3 2MASS Flag = 9*JFLAG+3*HFLAG+KFLAG Individual filter flags 0 = No Detection 1 = Catalog Match 2 = New Photometry on Images # 31 220 227 F8.3 M_i (Absolute i magnitude for Ho: 70.0 Omega_M: 0.300 Omega_L: 0.700 alpha_Q: -0.50) # 32 228 234 F7.3 Delta(g-i) Offset in magnitudes of the quasar (g-i) from the mode of the distribution of (g-i) 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) # 33 235 237 I3 Morphology flag 0 = point source 1 = extended # 34 238 240 I3 SCIENCEPRIMARY flag 0 = Object is not SCIENCEPRIMARY 1 = Object is SCIENCEPRIMARY # 35 241 243 I3 SDSS MODE flag (blends, overlapping scans) 1 = Primary object 2 = Secondary observation 3 = Family observation # 36 244 246 I3 Uniform target selection flag (0 = not selected with final algorithm 1 = selected with final algorithm # 37 247 258 I12 Target selection flag (BEST) # 38 259 261 I3 Low-z Quasar (color selection only) target flag 0 = not targeted as low-z quasar 1 = targeted as low-z quasar # 39 262 264 I3 High-z Quasar (color selection only) target flag 0 = not targeted as high-z quasar 1 = targeted as high-z quasar # 40 265 267 I3 FIRST target flag 0 = not targeted as FIRST 1 = targeted as FIRST # 41 268 270 I3 ROSAT target flag 0 = not targeted as ROSAT 1 = targeted as ROSAT # 42 271 273 I3 Serendipity target flag 0 = not targeted as serendipity 1 = targeted as serendipity # 43 274 276 I3 Star target flag 0 = not targeted as star 1 = targeted as star # 44 277 279 I3 Galaxy target flag 0 = not targeted as galaxy 1 = targeted as galaxy # 45 280 285 I6 SDSS Imaging Run Number for photometric measurements # 46 286 291 I6 Modified Julian Date of imaging observation # 47 292 297 I6 Modified Julian Date of spectroscopic observation # 48 298 302 I5 Spectroscopic Plate Number # 49 303 307 I5 Spectroscopic Fiber Number # 50 308 311 I4 SDSS Photometric Processing Rerun Number # 51 312 314 I3 SDSS Camera Column Number # 52 315 319 I5 SDSS Frame Number # 53 320 324 I5 SDSS Object Number # 54 325 336 I12 Target selection flag (TARGET) # 55 337 339 I3 Low-z Quasar (color selection only) target flag 0 = not targeted as low-z quasar 1 = targeted as low-z quasar # 56 340 342 I3 High-z Quasar (color selection only) target flag 0 = not targeted as high-z quasar 1 = targeted as high-z quasar # 57 343 345 I3 FIRST target flag 0 = not targeted as FIRST 1 = targeted as FIRST # 58 346 348 I3 ROSAT target flag 0 = not targeted as ROSAT 1 = targeted as ROSAT # 59 349 351 I3 Serendipity target flag 0 = not targeted as serendipity 1 = targeted as serendipity # 60 352 354 I3 Star target flag 0 = not targeted as star 1 = targeted as star # 61 355 357 I3 Galaxy target flag 0 = not targeted as galaxy 1 = targeted as galaxy # 62 358 364 F7.3 u PSF magnitude (TARGET) 0.000 ==> cannot retrieve value from SDSS database # 63 365 370 F6.3 error in u PSF magnitude (TARGET) # 64 371 377 F7.3 g PSF magnitude (TARGET) # 65 378 383 F6.3 error in g PSF magnitude (TARGET) # 66 384 390 F7.3 r PSF magnitude (TARGET) # 67 391 396 F6.3 error in r PSF magnitude (TARGET) # 68 397 403 F7.3 i PSF magnitude (TARGET) # 69 404 409 F6.3 error in i PSF magnitude (TARGET) # 70 410 416 F7.3 z PSF magnitude (TARGET) # 71 417 422 F6.3 error in z PSF magnitude (TARGET) # 72 423 443 I21 BestObjID (64-bit integer) # 73 444 464 I21 SpecObjID (64-bit integer) # 74 465 490 1X,A25 Object Name if previously published ("SDSS" in this column indicates that the object is a previously published SDSS discovery; # "BLANK" in this column indicates the column was originally blank) # 75 491 499 F9.6 Hewett & Wild redshift (Column 4 of HW_dr7qso_newz.tab 04-Nov-2010 version) # 76 500 508 F9.6 Hewett & Wild redshift error (Column 5 of HW_dr7qso_newz.tab 04-Nov-2010 version) # # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 # SDSS J R.A. (2000) Dec. z u g r i z A_u log NH FIRST S/N " ROSAT S/N " 2MASS J 2MASS H 2MASS K " Flg M_i D(g-i) Mp SP Bl Um BEST Flag Lz Hz FT RT Sr St Gx Run R_MJD S_MJD Plate Fib Prs Col Frm Obj TARGET Flag Lz Hz FT RT Sr St Gx u_TARGET g_TARGET r_TARGET i_TARGET z_TARGET BestObjID SpecObjID Other Name z_HW zerr_HW 000008.13+001634.6 0.033900 0.276301 1.8373 20.242 0.054 20.206 0.024 19.941 0.032 19.485 0.032 19.178 0.068 0.161 20.502 0.000 0.000 0.000 -9.000 0.000 0.000 17.351 0.291 0.000 0.000 0.000 0.000 0.000 18 -25.745 0.438 0 0 1 0 34603008 0 0 0 0 1 0 0 2662 52197 52203 685 470 40 4 283 150 1048576 0 0 0 0 1 0 0 20.094 0.044 19.980 0.017 19.852 0.020 19.405 0.021 19.100 0.079 587731186740822166 193034571195875328 SDSS_J000008.13+001634.6 1.836383 0.002156