VizieR

CfA VizieR . ADAC VizieR . CADC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . Beijing (Ch) VizieR .

VizieR

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B/cfht/obscore Log of CFHT Exposures (CADC, 1979-)
The CFHT Observation logs (sample) (original column names in green) (2555120 rows)
  -c=010.777361316439899 +41.502986362444, eq=J2000, rs=0.005
Post annotation about this record
ColumnValue  Explain   (UCD)
_r0.000 arcsec Distance from center (010.777361316439899+41.502986362444)[FK5/J2000] (pos.angDistance)
_RAJ200000 43 06.56671594558 "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+41 30 10.7509047988 "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)
_RAB195000 40 22.14503659659 "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+41 13 45.4905578687 "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)
_Glon121.25790318920237 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-21.34169023334781 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?667938/667938p  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_nameCFH12K MOSAIC  instrument name (meta.id;instr)
obs_id667938  internal dataset identifier (meta.id;meta.dataset)
dataproduct_typeimage  type of product (meta.note)
calib_level2   calibration level (phot.calib;arith.zp)
obs_release_date 2006-02-28T10:00:00 s timestamp of date the data becomes publicly available (time.epoch)
target_nameM31 NORTH  name of intended target (meta.id)
s_ra010.777361316439899 deg (i) right ascension of central coordinates (J2000) (s_ra) (pos.eq.ra;meta.main)
s_dec+41.502986362444 deg (i) declination of central coordinates (J2000) (s_dec) (pos.eq.dec;meta.main)
s_fov 0.847956667646900   size of the region covered, ∼diameter of minimum bounding circle (instr.fov;instr.pixel)
s_regionpolygon 11.244176433344503 41.26418465575024 10.302701534686875 41.273203658667484 10.306607779359672 41.73956876837927 11.255520775600285 41.73102040579064  region bounded by observation (obs.field)
s_resolution 0.00001   typical spatial resolution (pos.angResolution)
s_xel112420   dimensions (number of pixels) along one spatial axis (meta.number)
s_xel2 8196   dimensions (number of pixels) along the other spatial axis (meta.number)
t_min52584.2326346 d start time of observation (MJD) (t_min) (time.epoch)
t_max52584.2418939 d end time of observation (MJD) (t_max) (time.epoch)
t_exptime 800.00000000000000 s exposure time of observation (time.expo)
t_resolution 800.00000000000000   typical temporal resolution (time.resolution)
t_xel 12   dimensions (number of pixels) along the time axis (time.scale)
em_min  m start spectral coordinate value (instr.bandpass)
em_max  m stop spectral coordinate value (instr.bandpass)
em_res_power 6.63999986649   typical spectral resolution (spect.resolution)
em_xel 12   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-f133-0e805fdb5fbb  (i) primary key (meta.id.part;meta.main)
lastmodified 2021-02-19T22:45:44 s (i) timestamp of last modification of the metadata UTC (UTC) (lastmodified) (time.epoch)
  
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