MGCID 1 MGC object ID/serial number MGCMGCFN 2 MGC field number MGCX_IMAGE 3 Object x position [pixel] MGCY_IMAGE 4 Object y position [pixel] MGCMAG_ISO 5 Isophotal magnitude [mag] MGCMAG_ISO_DC 6 MAG_ISO corrected for extinction [mag] MGCMAG_ISOCOR 7 Gaussian corrected isophotal magnitude [mag] MGCMAG_ISOCOR_DC 8 MAG_ISOCOR corrected for extinction [mag] MGCMAG_AUTO 9 Kron-like elliptical aperture magnitude [mag] MGCMAG_AUTO_DC 10 MAG_AUTO corrected for extinction [mag] MGCB_MGC 11 Best of MAG_AUTO and MAG_ISOCOR [mag] MGCB_MGC_DC 12 B_MGC corrected for extinction [mag] MGCMAG_ERR 13 Error for B_MGC [mag] MGCBACKGRND 14 Background at object position [count] MGCTHRESH 15 Detection threshold above background [count] MGCISOAREA_IMAGE 16 Isophotal area above analysis threshold [pixel^2] MGCALPHA_J2000 17 Object right ascension (J2000) [deg] MGCDELTA_J2000 18 Object declination (J2000) [deg] MGCALPHA_B1950 19 Object right ascension (B1950) [deg] MGCDELTA_B1950 20 Object declination (B1950) [deg] MGCA_IMAGE 21 Flux rms along major axis [pixel] MGCB_IMAGE 22 Flux rms along minor axis [pixel] MGCTHETA_IMAGE 23 Position angle wrt x axis [deg] MGCERRA_IMAGE 24 Position error along major axis [pixel] MGCERRB_IMAGE 25 Position error along minor axis [pixel] MGCISOAREA_WORLD 26 Isophotal area above analysis threshold [deg^2] MGCFLAGS 27 Extraction flags MGCFWHM_IMAGE 28 FWHM assuming a gaussian core [pixel] MGCELLIPTICITY 29 1 - B_IMAGE/A_IMAGE MGCSTEL 30 Stellaricity MGCCCD 31 CCD number MGCCLASS 32 Classification parameter DISTANCE 33 ID 34 Serial number MGCFN 35 MGC field number CCD 36 CCD number X_IMAGE 37 Object x position of PhotObj RA,DEC Y_IMAGE 38 Object y position of PhotObj RA,DEC SPRA_J2000 39 SpecObj RA if present, else PhotObj RA SPDEC_J2000 40 SpecObj DEC if present, else PhotObj DEC OBJID 41 Unique SDSS identifier composed from [skyVersion rerun run camcol field obj] RUN 42 Run number RERUN 43 Rerun number CAMCOL 44 Camera column FIELD 45 Field number OBJ 46 The object id within a field. Usually changes between reruns of the same field TYPE 47 Morphological type classification FLAGS 48 Photo Object Attribute Flags SKY_U 49 Sky flux at the center of object (allowing for siblings if blended) SKY_G 50 SKY_R 51 SKY_I 52 SKY_Z 53 PSFMAG_U 54 PSF flux PSFMAG_G 55 PSFMAG_R 56 PSFMAG_I 57 PSFMAG_Z 58 PETROMAG_U 59 Petrosian flux PETROMAG_G 60 PETROMAG_R 61 PETROMAG_I 62 PETROMAG_Z 63 PETROR50_U 64 Radius containing 50% of Petrosian flux PETROR50_G 65 PETROR50_R 66 PETROR50_I 67 PETROR50_Z 68 ISOA_U 69 Isophotal major axis ISOA_G 70 A_WORLD 71 ISOA_I 72 ISOA_Z 73 ISOB_U 74 Isophotal minor axis ISOB_G 75 B_WORLD 76 ISOB_I 77 ISOB_Z 78 ISOPHI_U 79 Isophotal position angle (+N thru E) ISOPHI_G 80 THETA_WORLD 81 ISOPHI_I 82 ISOPHI_Z 83 DEVRAD_U 84 DeVaucouleurs fit scale radius DEVRAD_G 85 DEVRAD_R 86 DEVRAD_I 87 DEVRAD_Z 88 DEVAB_U 89 DeVaucouleurs fit a/b DEVAB_G 90 DEVAB_R 91 DEVAB_I 92 DEVAB_Z 93 DEVPHI_U 94 DeVaucouleurs fit position angle (+N thru E) DEVPHI_G 95 DEVPHI_R 96 DEVPHI_I 97 DEVPHI_Z 98 DEVMAG_U 99 DeVaucouleurs magnitude fit DEVMAG_G 100 DEVMAG_R 101 DEVMAG_I 102 DEVMAG_Z 103 EXPRAD_U 104 Exponetial fit scale radius EXPRAD_G 105 EXPRAD_R 106 EXPRAD_I 107 EXPRAD_Z 108 EXPAB_U 109 Exponential fit a/b EXPAB_G 110 EXPAB_R 111 EXPAB_I 112 EXPAB_Z 113 EXPPHI_U 114 Exponential fit position angle (+N thru E) EXPPHI_G 115 EXPPHI_R 116 EXPPHI_I 117 EXPPHI_Z 118 EXPMAG_U 119 Exponential magnitude fit EXPMAG_G 120 EXPMAG_R 121 EXPMAG_I 122 EXPMAG_Z 123 MODELMAG_U 124 Better of DeV/Exp magnitude fit (using r-band model) MODELMAG_G 125 MODELMAG_R 126 MODELMAG_I 127 MODELMAG_Z 128 FLAGS_U 129 Object detection flags per band FLAGS_G 130 FLAGS_R 131 FLAGS_I 132 FLAGS_Z 133 TYPE_U 134 Object type classification per band TYPE_G 135 TYPE_R 136 TYPE_I 137 TYPE_Z 138 STATUS 139 Status of the object in the survey ALPHA_J2000 140 J2000 right ascension (r') DELTA_J2000 141 J2000 declination (r') OFFSETRA_U 142 Filter position ra minus final ra (* cos(dec)) OFFSETRA_G 143 OFFSETRA_I 144 OFFSETRA_Z 145 OFFSETDEC_U 146 Filter position dec minus final dec OFFSETDEC_G 147 OFFSETDEC_I 148 OFFSETDEC_Z 149 PRIMTARGET 150 Bit mask of primary target categories the object was selected in SECTARGET 151 Bit mask of secondary target categories the object was selected in EXTINCTION_U 152 Extinction EXTINCTION_G 153 EXTINCTION_R 154 EXTINCTION_I 155 EXTINCTION_Z 156 RHO 157 Log size for surface brightness: 5xlog(Petro radius in i band) FIELDID 158 Link to the field this object is in PARENTID 159 Pointer to parent if object deblended else 0 DERED_U 160 Simplified mag corrected for extinction: modelMag-extinction DERED_G 161 DERED_R 162 DERED_I 163 DERED_Z 164 SPECOBJID 165 Unique ID MJD 166 MJD of observation PLATE 167 Plate ID TILE 168 Tile ID FIBERID 169 Fiber ID Z 170 Final redshift ZCONF 171 Redshift confidence ZSTATUS 172 Redshift status SPECCLASS 173 Spectral classification ZWARNING 174 Warning flags VELDISP 175 Velocity Dispersion SN_0 176 Median S/N in g SN_1 177 Median S/N in r SN_2 178 Median S/N in i RA 179 Ra in J2000 (of fibre presumably) DEC 180 Dec in J2000 PRIMTARGET 181 Specifies which primary target catagories the object was selected in SECTARGET 182 Specifies which secondary target catagories the object was selected in PLATEID 183 Link to plate on which the spectrum was taken SPECTROGRAPHID 184 Which spectrograph (1 2) THROUGHPUT 185 Fiber throughput as measured by mapper OBJTYPENAME 186 Object type as string TARGETOBJID 187 ID of target PhotoObj BESTOBJID 188 ID of best PhotoObj