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=636520
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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)
_RAJ200014 16 04.150 "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+18 54 42.40 "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)
_RAB195014 13 43.164 "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+19 08 35.69 "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)
_Glon014.494432 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+68.904132 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)

expnum636520  (i) [1/] Exposure unique identifier (meta.ref)
RAJ200014 16 04.1 "h:m:s" (i) Right Ascension (J2000) at the beginning of the exposure (pos.eq.ra;meta.main)
DEJ2000+18 54 42 "d:m:s" (i) Declination (J2000) at the beginning of the exposure (pos.eq.dec;meta.main)
ObsDate 2002-05-12T10:56:05 s Observation date (based on universal time, in DMF format = seconds since 1980) (time.epoch;obs)
ExpTime 900 s Exposure time in seconds for the exposure (time.duration;obs.exposure)
classd  Class of observation, coming from cfht (Note)   (meta.code;obs)
scienceC   [YCFHOT] Exposure Science classification (Note)   (meta.code.class)
preview    [YCILPST] Existence of a preview (Note)   (meta.ref.url;pos.frame)
ObsTypeDARK  Observation type (BIAS, FLAT, OBJECT, etc...) (meta.note)
ObjectANY  Target name as typed by the observer (meta.id)
InstrumCFH12K MOSAIC  Name of the instrument (meta.id;instr)
DetectorCFH12K  Name of the detector in use for this exposure (meta.id;instr.det)
airmass 1.062   Value of the airmass at the beginning of the exposure (obs.airMass)
FocusPRIME  Name of the telescope focus in use (meta.id;instr)
PInameunknown  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 2002-05-11T10:00:00 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)
runIDunknown  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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