2011AJ....142..116D

Query : 2011AJ....142..116D

2011AJ....142..116D - Astron. J., 142, 116 (2011/October-0)

Investigation of the errors in Sloan Digital Sky Survey proper-motion measurements using samples of quasars.

DONG R., GUNN J., KNAPP G., ROCKOSI C. and BLANTON M.

Abstract (from CDS):

We investigate in detail the probability distribution function (pdf) of the proper-motion measurement errors in the SDSS+USNO-B proper-motion catalog of Munn et al. using clean quasar samples. The pdf of the errors is well represented by a Gaussian core with extended wings, plus a very small fraction (<0.1%) of "outliers." We find that while formally the pdf could be well fit by a five-parameter fitting function, for many purposes it is also adequate to represent the pdf with a one-parameter approximation to this function. We apply this pdf to the calculation of the confidence intervals on the true proper motion for an SDSS+USNO-B proper-motion measurement, and discuss several scientific applications of the SDSS proper-motion catalog. Our results have various applications in studies of the galactic structure and stellar kinematics. Specifically, they are crucial for searching hyper-velocity stars in the Galaxy.

Abstract Copyright: ∼

Journal keyword(s): astrometry - catalogs - proper motions

Simbad objects: 1

goto Full paper

goto View the references in ADS

Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1274 0

Query : 2011AJ....142..116D

Basic data :
NAME NGP -- Region defined in the Sky
Other object types: otypes_help 		reg ([SFD98])
ICRS coord. (ep=J2000) : 		12 51 26.275 +27 07 41.70 [ ] D ~
FK4 coord. (ep=B1950 eq=1950) : 		12 49 00.000 +27 23 59.81 [ ]
Gal coord. (ep=J2000) : 		328.040682 +89.999997 [ ]
SIMBAD within arcmin
Overlay Simbad points in this preview
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
within arcsec sed-help-icon

Identifiers (3) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NAME NGP NAME North Galactic Pole [SFD98] J1251+2708

References (1274 between 1850 and 2026) (Total 1274)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

Observing logs

Herschel : 19    ISO : 3    XMM : 3   

   

External archives :

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2011AJ....142..116D and select 'bookmark this link' or equivalent in the popup menu