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=204264
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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)
_RAJ200000 42 42.546 "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+40 51 56.99 "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 39 58.459 "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+40 35 31.42 "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)
_Glon121.152484 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-21.975757 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)

expnum204264  (i) [1/] Exposure unique identifier (meta.ref)
RAJ200000 42 42.5 "h:m:s" (i) Right Ascension (J2000) at the beginning of the exposure (pos.eq.ra;meta.main)
DEJ2000+40 51 57 "d:m:s" (i) Declination (J2000) at the beginning of the exposure (pos.eq.dec;meta.main)
ObsDate 1993-08-26T13:36:05 s Observation date (based on universal time, in DMF format = seconds since 1980) (time.epoch;obs)
ExpTime 10 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)
previewL   [YCILPST] Existence of a preview (Note)   (meta.ref.url;pos.frame)
ObsTypeOBJECT  Observation type (BIAS, FLAT, OBJECT, etc...) (meta.note)
ObjectM32  Target name as typed by the observer (meta.id)
InstrumSIS  Name of the instrument (meta.id;instr)
DetectorLORAL3  Name of the detector in use for this exposure (meta.id;instr.det)
airmass 1.092   Value of the airmass at the beginning of the exposure (obs.airMass)
FocusCASS  Name of the telescope focus in use (meta.id;instr)
PInameKormendy  Name of the Principal Investigator as typed by the support astronomer (obs.observer)
ObserverKORMENDY  Observer name as typed by the support astronomer (obs.observer)
RelDate 1995-08-27T13:36:05 s Release date of the exposure in DMF format (seconds since 1980) (time.epoch)
X 552 pix Dimension of the image (X) (instr.fov;instr.pixel)
Y 512 pix Dimension of the image (Y) (instr.fov;instr.pixel)
runID1993IIH08  Run Identification, made of YYYY + Semester (I-II) + Country (C-F-H) + running number (meta.record;phot.color;em.opt.I)
CommentN33S = 1993 AUGUST 25/26  Comments as typed in by the observer (meta.note;obs.observer)

CFHTArchive  Dearchive Request (meta.ref.url)
  
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