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=145921
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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)
_RAJ200012 34 27.434 "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+02 11 10.23 "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)
_RAB195012 31 54.059 "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+02 27 41.74 "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)
_Glon292.953907 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+64.728444 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)

expnum145921  (i) [1/] Exposure unique identifier (meta.ref)
RAJ200012 34 27.4 "h:m:s" (i) Right Ascension (J2000) at the beginning of the exposure (pos.eq.ra;meta.main)
DEJ2000+02 11 10 "d:m:s" (i) Declination (J2000) at the beginning of the exposure (pos.eq.dec;meta.main)
ObsDate 1992-02-20T12:41:09 s (i) Observation date (based on universal time, in DMF format = seconds since 1980) (time.epoch;obs)
ExpTime 240 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)
previewI   [YCILPST] Existence of a preview (Note)   (meta.ref.url;pos.frame)
ObsTypeOBJECT  Observation type (BIAS, FLAT, OBJECT, etc...) (meta.note)
ObjectNGC 4536 6840/90  Target name as typed by the observer (meta.id)
InstrumPALILA  Name of the instrument (meta.id;instr)
DetectorPHX1 CCD  Name of the detector in use for this exposure (meta.id;instr.det)
airmass 1.051   Value of the airmass at the beginning of the exposure (obs.airMass)
FocusCASS  Name of the telescope focus in use (meta.id;instr)
PInameArsenault  Name of the Principal Investigator as typed by the support astronomer (obs.observer)
ObserverPALILA2 JONCAS/ARSENAULT  Observer name as typed by the support astronomer (obs.observer)
RelDate 1994-02-20T12:41:09 s Release date of the exposure in DMF format (seconds since 1980) (time.epoch)
X 540 pix Dimension of the image (X) (instr.fov;instr.pixel)
Y 540 pix Dimension of the image (Y) (instr.fov;instr.pixel)
runID1992IC35  Run Identification, made of YYYY + Semester (I-II) + Country (C-F-H) + running number (meta.record;phot.color;em.opt.I)
CommentMOON VERY CLOSE  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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