VizieR

CfA VizieR . ADAC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . INASAN VizieR .

Catalog


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

  
I/271
  The GSC 2.2 Catalogue (STScI, 2001)
ReadMe+ftp
Similar Catalogs
4 annotation(s) 		img(gal)
1.I/271/outThe Full GSC2.2.1 Catalogue (455851237 objects) (455851237 rows)
The construction of the GSC-II is still in progress: this version has no proper motions, and the magnitude limits are 18.5 in F (red) and 19.5 in J (blue). The data are copyrighted, check the data use Policy.

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  GSC2.2 (char) (i) Identification of the object (Note 1)   (meta.id;meta.main)
  RA(ICRS) deg (i) Right Ascension in ICRS (J2000), at Epoch (pos.eq.ra;meta.main)
  DE(ICRS) deg (i) Declination in ICRS (J2000) (pos.eq.dec;meta.main)
  Epoch yr Epoch of the position (time.epoch)
  e_RAdeg arcsec Mean error on RAdeg (Note 2)   (stat.error)
  e_DEdeg arcsec Mean error on DEdeg (Note 2)   (stat.error)
  Rmag mag (n) Magnitude in F photographic band (red) (Note 6)   (phot.mag;em.opt.R)
  e_Rmag mag (n) Mean error on Rmag (Note 2)   (stat.error)
  Bjmag mag (n) Magnitude in J photographic band (blue) (Note 6)   (phot.mag;em.opt.B)
  e_Bjmag mag (n) Mean error on Bjmag (Note 2)   (stat.error)
  Vmag mag (n) Magnitude in V photographic band (green) (Note 6)   (phot.mag;em.opt.V)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  e_Vmag mag (n) Mean error on Vmag (Note 2)   (stat.error)
  Imag mag (n) Magnitude in N photographic band (Note 6)   (phot.mag;em.opt.I)
  e_Imag mag (n) Mean error on Imag (Note 2)   (stat.error)
  Class   [0,5] Object class (Note 3)   (src.class)
  a pix Semi-major axis of fitting ellipse (phys.angSize;src)
  e  Eccentricity of fitting ellipse (src.orbital.eccentricity)
  aPA deg Position angle (N thru E) of fitting ellipse (pos.posAng)
  Status  Source status flag (Note 4)   (meta.code)
  Np  Number of plates (Note 5)   (meta.number)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
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usage  Display UCD1+    UCD1  
Annotations on I/271
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Posted by fox1 (2015/10/04 09:02:58)
[I/271]
Well, the column "Epoch" contains the mean epoch of the position, which would be the date of observation if only one observation has been made (the source is present on a single plate). Several observations being made for each source, the "Epoch" column is the mean of the different dates of observations.
Posted by svats (2015/10/03 20:57:04)
[I/271]
How can I find the date of original observation for a given star in the catalog?
Posted by seb (2012/03/26 15:17:29)
[I/271]
You asked about downloading the GSC 2.2 catalogue from CDS. The files we use here are dedicated compressed binary format probably not suitable for MaximDL.
There are versions of the catalogue which are easier to download and probably more appropriate :
http://gsc.dc3.com/

If you want to make dedicated queries to large catalogues, we have a series of scripts in the cdsclient package :
http://cds.u-strasbg.fr/resources/doku.php?id=cdsclient
Posted by desfond (2012/03/15 22:54:45)
[I/271]
Can I download catalogue GSC 2.2 in my computer ?
It's necessary with MaximDL to connect my mount Geminy. Thanks.Claude
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