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Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
Target Name (resolved by Sesame) or Position:
 Target dimension:
NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  
B/cfht
 Viz.logos.cadc Log of CFHT Exposures (CADC, 1979-)
ReadMe+ftp
Similar Catalogs
Post annotation 		img(gal)
1.B/cfht/obscore(c)The CFHT Observation logs (original column names in green) (3048767 rows)
2.B/cfht/cfht(c)Old Observation Log (October 2002 to 2007) (original column names in green) (631125 rows)
The column expnum provides an access to details on the exposures, and a link to the Preview and Retrieval System via the CADC
Help Xmatch is

Simple ConstraintList Of Constraints
 
Standard Original
Query by Constraints constraints help applied on Columns (Output Order: + - )
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Column  Constraint Explain   (UCD)
  (1)obs_publisher_did (char) publisher dataset identifier (meta.id;meta.dataset)
  (1)obs_collection (char) short name for the data colection (meta.id;meta.dataset)
  (1)facility_name (char) (n)telescope name (meta.id;instr.tel)
  (1)instrument_name (char) instrument name (meta.id;instr)
  (1)obs_id (char) internal dataset identifier (meta.id;meta.dataset)
  (1)dataproduct_type (char) type of product (meta.note)
  (1)calib_level  (n) calibration level (phot.calib;arith.zp)
  (1)obs_release_date s (n)timestamp of date the data becomes publicly available (time.epoch)
  (1)target_name (char) (n)name of intended target (meta.id)
  (1)RAJ2000 deg (n)(i) right ascension of central coordinates (J2000) (s_ra) (pos.eq.ra;meta.main)
  (1)DEJ2000 deg (n)(i) declination of central coordinates (J2000) (s_dec) (pos.eq.dec;meta.main)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)s_fov  (n) size of the region covered, ∼diameter of minimum bounding circle (instr.fov;instr.pixel)
  (1)s_region (char) (n)region bounded by observation (obs.field)
  (1)s_resolution  (n) typical spatial resolution (pos.angResolution)
  (1)s_xel1  (n) dimensions (number of pixels) along one spatial axis (meta.number)
  (1)s_xel2  (n) dimensions (number of pixels) along the other spatial axis (meta.number)
  (1)t_min d (n) start time of observation (MJD) (t_min) (time.epoch)
  (1)t_max d (n) end time of observation (MJD) (t_max) (time.epoch)
  (1)t_exptime s (n) exposure time of observation (time.expo)
  (1)t_resolution  (n) typical temporal resolution (time.resolution)
  (1)t_xel  (n) dimensions (number of pixels) along the time axis (time.scale)
  (1)em_min m (n) start spectral coordinate value (instr.bandpass)
  (1)em_max m (n) stop spectral coordinate value (instr.bandpass)
  (1)em_res_power  (n) typical spectral resolution (spect.resolution)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)em_xel  (n) dimensions (number of pixels) along the energy axis (phys.size)
  (1)em_ucd (char) (n)UCD describing the spectral axis (meta.number)
  (1)pol_states (char) (n)polarization states present in the data (phys.polarization)
  (1)pol_xel  (n) dimensions (number of pixels) along the polarization axis (phys.size)
  (1)o_ucd (char) UCD describing the observable axis (pixel values) (meta.number)
  (1)access_url (char) URL to download the data (meta.ref.url)
  (1)access_format (char) format of the data file (meta.note)
  (1)access_estsize  (n) estimated size of the download (meta.number)
  (1)core_id (char) (i) primary key (meta.id.part;meta.main)
  (1)lastModified s (n)(i) timestamp of last modification of the metadata UTC (UTC) (lastmodified) (time.epoch)
  (2)expnum  (i) [1/] Exposure unique identifier (meta.id;meta.main)
  (2)RAJ2000 "h:m:s" (n)(i) Right Ascension (J2000) at the beginning of the exposure (pos.eq.ra;meta.main)
  (2)DEJ2000 "d:m:s" (n)(i) Declination (J2000) at the beginning of the exposure (pos.eq.dec;meta.main)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (2)ObsDate s (i) Observation date (based on universal time, in DMF format = seconds since 1980) (time.epoch;obs)
  (2)ExpTime s Exposure time in seconds for the exposure (time.duration;obs.exposure)
  (2)class (char) Class of observation, coming from cfht (Note)   (meta.code;obs)
  (2)science (char) [YCFHOT] Exposure Science classification (Note)   (meta.code.class)
  (2)preview (char) [YCILPST] Existence of a preview (Note)   (meta.ref.url;pos.frame)
  (2)ObsType (char) Observation type (BIAS, FLAT, OBJECT, etc...) (meta.note)
  (2)Object (char) Target name as typed by the observer (meta.id)
  (2)Instrum (char) Name of the instrument (meta.id;instr)
  (2)Detector (char) Name of the detector in use for this exposure (meta.id;instr.det)
  (2)airmass  (n) Value of the airmass at the beginning of the exposure (obs.airMass)
  (2)Focus (char) Name of the telescope focus in use (meta.id;instr)
  (2)PIname (char) Name of the Principal Investigator as typed by the support astronomer (obs.observer)
  (2)Observer (char) Observer name as typed by the support astronomer (obs.observer)
  (2)RelDate s Release date of the exposure in DMF format (seconds since 1980) (time.epoch)
  (2)naxis1 pix (n) Dimension of the image (X) (instr.fov;instr.pixel)
  (2)naxis2 pix (n) Dimension of the image (Y) (instr.fov;instr.pixel)
  (2)runID (char) Run Identification, made of YYYY + Semester (I-II) + Country (C-F-H) + running number (meta.record;phot.color;em.opt.I)
  (2)Comment (char) Comments as typed in by the observer (meta.note;obs.observer)
  (2)CFHT (char) Dearchive Request (meta.ref.url)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
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