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=010.777689581113201 +41.503041446950, eq=J2000, rs=0.005
Post annotation about this record
ColumnValue  Explain   (UCD)
_r0.000 arcsec Distance from center (010.777689581113203+41.503041446950)[FK5/J2000] (pos.angDistance)
_RAJ200000 43 06.64549946717 "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 10.9492090207 "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 22.22346887621 "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 45.6898998387 "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)
_Glon121.25816902676409 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-21.34164371596340 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?667942/667942p  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_id667942  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_ra010.777689581113201 deg (i) right ascension of central coordinates (J2000) (s_ra) (pos.eq.ra;meta.main)
s_dec+41.503041446950 deg (i) declination of central coordinates (J2000) (s_dec) (pos.eq.dec;meta.main)
s_fov 0.848060457999050   size of the region covered, ∼diameter of minimum bounding circle (instr.fov;instr.pixel)
s_regionpolygon 11.244377357648093 41.2642210144554 10.302893791072183 41.27323849914791 10.30696898671017 41.73960413348572 11.25604395622625 41.73110893462395  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 8198   dimensions (number of pixels) along the other spatial axis (meta.number)
t_min52584.2743507 d start time of observation (MJD) (t_min) (time.epoch)
t_max52584.2836100 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 6.35483980179   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_id00000000-0000-0000-3897-0e806139191f  (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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