Choose a database in the left panel then select the table you want!
Table: ls_dr7.survey_ccds
(The bold columns are indexed columns)
Column Name | Description | Datatype |
---|---|---|
camera | The camera that took this image, e.g. decam | VARCHAR |
ccd_cuts | (ignore) | BIGINT |
ccddecoff | Median astrometric offset for the CCD | REAL |
ccddecrms | rms in astrometric offset for the CCD | REAL |
ccdname | CCD name (see DECam layout), e.g. N10 or S7 | VARCHAR |
ccdnmatch | Number of matches for the CCD | SMALLINT |
ccdphrms | Photometric rms for the CCD (in mag) | REAL |
ccdraoff | Median astrometric offset for the CCD | REAL |
ccdrarms | rms in astrometric offset for the CCD | REAL |
ccdskycounts | Mean sky count level per pixel in the CP-processed frames measured (with iterative rejection) for each CCD in the image section [500:1500,1500:2500] | REAL |
ccdzpt | Zeropoint for the CCD (AB mag). | REAL |
cd1_1 | Astrometric header value: transformation matrix. | REAL |
cd1_2 | Astrometric header value: transformation matrix. | REAL |
cd2_1 | Astrometric header value: transformation matrix. | REAL |
cd2_2 | Astrometric header value: transformation matrix. | REAL |
crpix1 | Astrometric header value: X reference pixel. | REAL |
crpix2 | Astrometric header value: Y reference pixel. | REAL |
crval1 | Astrometric header value: RA of reference pixel. | DOUBLE |
crval2 | Astrometric header value: Dec of reference pixel. | DOUBLE |
dec | Declination at epoch J2000 | DOUBLE |
dec_bore | Telescope boresight Dec of this exposure (deg). | DOUBLE |
elat | Ecliptic Latitude | DOUBLE |
elon | Ecliptic Longitude | DOUBLE |
expnum | Unique DECam exposure number, e.g. 348244 | BIGINT |
exptime | Exposure time in seconds, e.g. 30 | REAL |
filter | Filter used for observation, e.g. g, r, z | CHAR |
fwhm | [use seeing instead] | REAL |
glat | Galactic Latitude | DOUBLE |
glon | Galactic Longitude | DOUBLE |
height | Height in pixels of this image, eg 4096. | SMALLINT |
htm9 | HTM index (order 9 => ~10 arcmin size) | INTEGER |
image_filename | Path to FITS image, eg decam/CP20140810_g_v2/c4d_140815_235218_ooi_g_v2.fits.fz. | VARCHAR |
image_hdu | FITS HDU number in the image_filename file where this image can be found. | SMALLINT |
mjd_obs | Date of observation in MJD (in UTC system), eg 56884.99373389. | DOUBLE |
nest4096 | HEALPIX index (Nsides 4096, Nest scheme => ~52 arcsec size) | INTEGER |
object | Name listed in the object tag from the CCD header | VARCHAR |
propid | NOAO Proposal ID that took this image, eg 2014B-0404. | VARCHAR |
ra | Right ascension at epoch J2000 | DOUBLE |
ra_bore | Telescope boresight RA of this exposure (deg). | DOUBLE |
ring256 | HEALPIX index (Nsides 256 => ~14 arcmin size) | INTEGER |
sig1 | Median per-pixel error standard deviation, in nanomaggies | REAL |
skyrms | Sky rms for the entire image (in counts) | REAL |
width | Width in pixels of this image, eg 2046. | SMALLINT |
yshift | (ignore; it is always False) | SMALLINT |
zpt | Median zero point for the entire image (median of all CCDs of the image), eg 25.0927. | REAL |