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=123893
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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)
_RAJ200023 13 17.288 "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+57 10 07.52 "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)
_RAB195023 11 04.837 "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+56 53 47.46 "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)
_Glon109.899255 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 -3.198490 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)

expnum123893  (i) [1/] Exposure unique identifier (meta.ref)
RAJ200023 13 17.3 "h:m:s" (i) Right Ascension (J2000) at the beginning of the exposure (pos.eq.ra;meta.main)
DEJ2000+57 10 08 "d:m:s" (i) Declination (J2000) at the beginning of the exposure (pos.eq.dec;meta.main)
ObsDate 1991-08-03T08:37:51 s Observation date (based on universal time, in DMF format = seconds since 1980) (time.epoch;obs)
ExpTime 13 s Exposure time in seconds for the exposure (time.duration;obs.exposure)
classf  Class of observation, coming from cfht (Note)   (meta.code;obs)
scienceC   [YCFHOT] Exposure Science classification (Note)   (meta.code.class)
previewS   [YCILPST] Existence of a preview (Note)   (meta.ref.url;pos.frame)
ObsTypeFLAT  Observation type (BIAS, FLAT, OBJECT, etc...) (meta.note)
ObjectLAMP + HF  Target name as typed by the observer (meta.id)
InstrumCOUDE F/8.2  Name of the instrument (meta.id;instr)
DetectorRETICON  Name of the detector in use for this exposure (meta.id;instr.det)
airmass 1.923   Value of the airmass at the beginning of the exposure (obs.airMass)
FocusCOUDE  Name of the telescope focus in use (meta.id;instr)
PInameWalker  Name of the Principal Investigator as typed by the support astronomer (obs.observer)
ObserverWALKER & GLASPEY RETICON1  Observer name as typed by the support astronomer (obs.observer)
RelDate 1993-08-03T08:37:51 s Release date of the exposure in DMF format (seconds since 1980) (time.epoch)
X 2000 pix Dimension of the image (X) (instr.fov;instr.pixel)
Y 1 pix Dimension of the image (Y) (instr.fov;instr.pixel)
runID1991IIC55  Run Identification, made of YYYY + Semester (I-II) + Country (C-F-H) + running number (meta.record;phot.color;em.opt.I)
Comment830-1 TILT=29:32.5  Comments as typed in by the observer (meta.note;obs.observer)

CFHTArchive  Dearchive Request (meta.ref.url)
  
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