VizieR

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

VizieR

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B/cfht/cfht Log of CFHT Exposures (CADC, 1979-)
Old Observation Log (October 2002 to 2007) (original column names in green) (631125 rows)
  expnum=740039
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Note: The column expnum provides an access to details on the exposures, and a link to the Preview and Retrieval System via the CADC

ColumnValue  Explain   (UCD)
_RAJ200005 35 16.200 "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)
_DEJ2000-05 22 53.50 "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)
_RAB195005 32 48.725 "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)
_DEB1950-05 24 46.80 "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)
_Glon209.002489 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-19.381339 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)

expnum740039  (i) [1/] Exposure unique identifier (meta.ref)
RAJ200005 35 16.2 "h:m:s" (i) Right Ascension (J2000) at the beginning of the exposure (pos.eq.ra;meta.main)
DEJ2000-05 22 53 "d:m:s" (i) Declination (J2000) at the beginning of the exposure (pos.eq.dec;meta.main)
ObsDate 2004-03-30T06:52:09 s Observation date (based on universal time, in DMF format = seconds since 1980) (time.epoch;obs)
ExpTime 1 s Exposure time in seconds for the exposure (time.duration;obs.exposure)
classo  Class of observation, coming from cfht (Note)   (meta.code;obs)
scienceY   [YCFHOT] Exposure Science classification (Note)   (meta.code.class)
preview    [YCILPST] Existence of a preview (Note)   (meta.ref.url;pos.frame)
ObsTypeOBJECT  Observation type (BIAS, FLAT, OBJECT, etc...) (meta.note)
ObjectTRAPEZIUM  Target name as typed by the observer (meta.id)
InstrumMEGAPRIME  Name of the instrument (meta.id;instr)
DetectorMEGACAM  Name of the detector in use for this exposure (meta.id;instr.det)
airmass 1.819   Value of the airmass at the beginning of the exposure (obs.airMass)
FocusMEGAPRIME  Name of the telescope focus in use (meta.id;instr)
PInameBO REIPURTH  Name of the Principal Investigator as typed by the support astronomer (obs.observer)
ObserverQSO TEAM  Observer name as typed by the support astronomer (obs.observer)
RelDate 2005-08-31T10:00:00 s Release date of the exposure in DMF format (seconds since 1980) (time.epoch)
X  pix Dimension of the image (X) (instr.fov;instr.pixel)
Y  pix Dimension of the image (Y) (instr.fov;instr.pixel)
runID2004AH48  Run Identification, made of YYYY + Semester (I-II) + Country (C-F-H) + running number (meta.record;phot.color;em.opt.I)
Comment   Comments as typed in by the observer (meta.note;obs.observer)

CFHTArchive  Dearchive Request (meta.ref.url)
  
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Rules of usage of VizieR data

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