spm_1_0.html

SPM Catalog 1.1

The Yale/San Juan Southern Proper Motion Catalog

at the South Galactic Pole:  Revision 1

The SPM Catalog 1.1 contains the results of the Southern Proper Motion program (SPM) for an extended region around the South Galactic Pole.  The SPM, which will eventually cover the sky south of Dec. = -17 degrees, includes absolute proper motions, positions, and B,V photographic photometry for stars in the magnitude range 5 < V < 18.5.  The proper motions are measured relative to external galaxies and the positions are on the system of the ICRS via the Hipparcos/Tycho catalog, (equinox 2000, epoch 1991.25).

The SPM 1.1 represents a recompilation of the same plate material and measures which were used in the SPM 1.0 , but with an improved treatment of the corrections to absolute proper motion.  In fact, the SPM 1.1 was constructed by extracting the data from the SPM 2.0 for all objects in the SPM 1.0.  A slightly different criterion for distinguishing duplicate entries from true nearby pairs has resulted in the net addition of seven more total objects in the SPM 1.1, (see the table below).  Also, due to the manner in which object numbers are assigned in the overlap region of adjacent fields, combined with the inclusion of additional fields not available when the SPM 1.0 was compiled, approximately 700 objects in the SPM 1.1 have been assigned new identification numbers different from those in the SPM 1.0.

To obtain the Catalog via ftp, click here.

sky coverage (sq. deg.)

           720

magnitude range [approx.]

5<V<18.5

total # of objects

    58,887

kinematic study stars [randomly selected]                  

     33,497

special catalog stars*

     16,872

Hipparcos stars

       2,129

Tycho stars [excluding Hipparcos]

       4,758

galaxies [visually confirmed]

       8,771

QSOs [tentative identification]

          194

* The SPM input list includes:  randomly selected stars for the purpose of Galactic kinematic studies; reference stars required for the various astrometric and photometric reductions; galaxies, to determine the proper-motion zero point; and stars of special interest chosen from a variety of catalogs, including...

See the SPM 1.0 page for a description of various aspects of the Catalog:
 

Versions of the Catalog:

SPM Investigators

The SPM Team consists of Imants Platais, Vera Kozhurina-Platais, Terrence Girard, Carlos López, and René Méndez - all working tirelessly under the watchful eye of their fearless leader, William van Altena.

Any questions or problems concerning the SPM Catalog may be addressed to spm@astro.yale.edu

Acknowledgements

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This page last modified by T. Girard - 01/99.