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VizieR

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B/cfht/obscore Log of CFHT Exposures (CADC, 1979-)
The CFHT Observation logs (original column names in green) (2239798 rows)
  -c=133.148990377470994 +28.331228470034, eq=J2000, rs=0.005
Post annotation about this record
ColumnValue  Explain   (UCD)
_r0.000 arcsec Distance from center (133.148990377470994+28.331228470034)[FK5/J2000] (pos.angDistance)
_RAJ200008 52 35.75769059304 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+28 19 52.4224921231 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195008 49 35.47039451121 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+28 31 12.7934670182 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon196.79408499919839 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat+37.69880123339926 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)

obs_publisher_didivo://cadc.nrc.ca/CFHT?419168/419168o  publisher dataset identifier (meta.id;meta.dataset)
obs_collectionCFHT  short name for the data colection (meta.id;meta.dataset)
facility_nameCFHT 3.6m  telescope name (meta.id;instr.tel)
instrument_nameaobvis  instrument name (meta.id;instr)
obs_id419168  internal dataset identifier (meta.id;meta.dataset)
dataproduct_typeimage  type of product (meta.note)
calib_level1   calibration level (phot.calib;arith.zp)
obs_release_date 1999-08-31T00:00:00 s timestamp of date the data becomes publicly available (time.epoch)
target_name55 cnc, I , 0.3sec, raster 2  name of intended target (meta.id)
s_ra133.148990377470994 deg (i) right ascension of central coordinates (J2000) (s_ra) (pos.eq.ra;meta.main)
s_dec+28.331228470034 deg (i) declination of central coordinates (J2000) (s_dec) (pos.eq.dec;meta.main)
s_fov 0.012754008838777   size of the region covered, ∼diameter of minimum bounding circle (instr.fov;instr.pixel)
s_regionPolygon ICRS 133.14367891538032 28.326891726804938 133.14367848108384 28.33556500675097 133.1543022729166 28.335565007496378 133.15430184019078 28.326891727550112  region bounded by observation (obs.field)
s_resolution    typical spatial resolution (pos.angResolution)
s_xel1 552   dimensions (number of pixels) along one spatial axis (meta.number)
s_xel2 512   dimensions (number of pixels) along the other spatial axis (meta.number)
t_min50818.5292590 d start time of observation (MJD) (t_min) (time.epoch)
t_max50818.5292625 d end time of observation (MJD) (t_max) (time.epoch)
t_exptime 0.30000001192093 s exposure time of observation (time.expo)
t_resolution 0.30000001192093   typical temporal resolution (time.resolution)
t_xel 1   dimensions (number of pixels) along the time axis (time.scale)
em_min 7.10000000000e-07 m start spectral coordinate value (instr.bandpass)
em_max 9.30000000000e-07 m stop spectral coordinate value (instr.bandpass)
em_res_power 3.73000001907   typical spectral resolution (spect.resolution)
em_xel 1   dimensions (number of pixels) along the energy axis (phys.size)
em_ucd   UCD describing the spectral axis (meta.number)
pol_states   polarization states present in the data (phys.polarization)
pol_xel    dimensions (number of pixels) along the polarization axis (phys.size)
o_ucdphot.count  UCD describing the observable axis (pixel values) (meta.number)
access_urlDatalink  URL to download the data (meta.ref.url)
access_formatapplication/x-votable+xml;content=datalink  format of the data file (meta.note)
access_estsize    estimated size of the download (meta.number)
core_id00000000-0000-0000-e6c3-0144463b882e  (i) primary key (meta.id.part;meta.main)
lastmodified 2017-12-13T09:37:31 s (i) timestamp of last modification of the metadata UTC (UTC) (lastmodified) (time.epoch)
  
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