Plate



Each plate has 640 observed spectra.


Aliases: sxPlate

Data Members of Plate:
Member Name/AliasesDatatypeDescription
plate_ID int64 Unique ID
mjd;
MJD
int32 MJD of observation
plateID;
plateid
int16 Plate ID
tileID;
tileid
int16 Tile ID
mapID;
mapid
int16 Map ID
nExp;
nexp
int16 Number of Exposures
tai;
TAI
float32 TAI Seconds
raBoresight;
ra_b
float64 RA of telescope boresight
decBoresight;
dec_b
float64 DEC of telescope boresight
taiHms;
taihms
char[20] HMS
expTime;
exptime
float32 Total Exposure time
expTimeB1;
expt_b1
float32 Exposure time b1 camera
expTimeB2;
expt_b2
float32 Exposure time b2 camera
expTimeR1;
expt_r1
float32 Exposure time r1 camera
expTimeR2;
expt_r2
float32 Exposure time r2 camera
helioRV;
heliorv
float32 Heliocentric velocity correction
ra;
radeg
float64 RA
dec;
decdeg
float64 DEC
htmID int64 Hierarchical Triangular Mesh level 20 ID of plate center
sn1;
SN1
float32[3] Signal-to-noise 1st Spectrograph g,r,i
sn2;
SN2
float32[3] Signal-to-noise 2nd Spectrograph g,r,i
reddening float32[5] Reddening in all five bands
dateObs;
dateobs;
date_obs
char[12] Date of observation
timeSys;
timesys
char[8] Time System
quality char[12] Quality of night/image
name char[32] Name of target; PlateId-MJD-Mapper ReRun
program char[16] ID of CCD Program
version char[20] IOP Version
observer;
obsrvr
char[20] Observer name
camVer;
camver
char[20] Camera code version
spec2DVer;
vers2d;
spec2d_ver;
spec2d_v
char[20] IDL Spec2D version
utilsVer;
versutil;
utils_ver;
utils_v
char[20] IDL Utils version
spec1DVer;
vers1d;
vers_1d
char[20] Spec1D version
readVer;
versread
char[20] Version of idlspec2d for pre-processing raw data
combVer;
verscomb
char[20] Version of idlspec2d for combining multiple spectra
expID int64[] Exposure ID array. Use expIDString(i) to get the string.
expIDString(int32) char* Function to retrieve exposure id string
specobj;
spec
ManyAssoc(SpecObj) Link to the spectroscopic objects on this plate

© Copyright 2000 Peter Z. Kunszt Alex S. Szalay , Ani R. Thakar
and The SDSS Collaboration