scholarly journals The GSC-II catalog release GSC 2.3: description and properties

2007 ◽  
Vol 3 (S248) ◽  
pp. 316-319 ◽  
Author(s):  
B. Bucciarelli ◽  
M. G. Lattanzi ◽  
B. McLean ◽  
R. Drimmel ◽  
G. Greene ◽  
...  
Keyword(s):  
Space Telescope ◽  
Star Catalog ◽  
Science Institute ◽  
Guide Star ◽  
Star Classification ◽  
Space Telescope Science Institute ◽  
A Current ◽  
Multi Band

AbstractThe GSC 2.3 is a current catalog release extracted from the Guide Star Catalog II database, which is maintained at the Space Telescope Science Institute in Baltimore, USA. The catalog contains astrometry, multi-band photometry (BJ,RJ,IN) and star/non-star classification for 945,592,683 objects down to the magnitude limit of the survey plates. We review the performance of stellar parameters, anticipating the improvements in astrometric accuracy foreseen by its recalibration with the newly available catalog in the UCAC series.

scholarly journals The Guide Star Selection System and the Guide Star Catalog for Space Telescope

1986 ◽  
Vol 109 ◽  
pp. 721-727
Author(s):  
Jane L. Russell
Keyword(s):  
Production System ◽  
Selection System ◽  
Space Telescope ◽  
Star Catalog ◽  
Science Institute ◽  
Visual Magnitude ◽  
Photoelectric Measurements ◽  
Guide Star ◽  
Space Telescope Science Institute

The Guide Star Selection System (GSSS) will provide relative positions of two guide stars and the target for each observation of the Space Telescope as well as photometry for the guide stars. Being developed at the Space Telescope Science Institute, the GSSS is a production system which is based on PDS measurements of Schmidt survey plates. The specified accuracy for the system is +/−0.33 arcsec for the separation of the guide stars and 0.4 mag in the bandpass of the Space Telescope's Fine Guidance Sensors. The GSSS will produce two catalogs which will be used in the operation of the system. The Guide Star Photometry catalog includes photoelectric measurements (+/−0.05 mag) in B and V for six stars over the guide star range, 9.0 to 14.5 visual magnitude, near the central part of each 6 by 6 deg survey plate. The Guide Star Catalog will include the list of all possible guide stars and brighter, positions (at least +/−1 arcsec) and magnitudes (at least +/−0.4 mag) for essentially the whole sky complete to visual magnitude 15.

Optimisation of JWST operations with the help of Gaia

2017 ◽  
Vol 12 (S330) ◽  
pp. 98-99
Author(s):  
J. Sahlmann ◽  
E. G. Nelan ◽  
P. Chayer ◽  
B. McLean ◽  
M. Lallo
Keyword(s):  
Focal Plane ◽  
Space Telescope ◽  
Star Catalog ◽  
Science Institute ◽  
James Webb Space Telescope ◽  
Survey Results ◽  
Guide Star ◽  
Operations Center ◽  
Space Telescope Science Institute ◽  
Operational Aspects

AbstractThe James Webb Space Telescope (JWST) is scheduled for launch in 2018. To operate and observe efficiently, JWST will rely on various external astrometric and photometric catalogues, in particular the HST Guide Star Catalog (GSC), for instance to locate sources accurately on the sky. The incorporation of the Gaia astrometric catalog will improve the absolute astrometry of the GSC and is therefore relevant for JWST operations. We outline how the JWST Science and Operations Center hosted at the Space Telescope Science Institute (STScI) intends to use the Gaia survey results to improve upon operational aspects such as the guiding and the geometric focal plane characterisation of JWST.

Mining the Optical/Ultraviolet Sky with the Multimission Archive at the Space Telescope Science Institute (MAST)

2006 ◽  
pp. 680-682
Author(s):  
Paolo Padovani ◽  
D. Christian ◽  
M. Donahue ◽  
C. Imhoff ◽  
T. Kimball ◽  
...  
Keyword(s):  
Space Telescope ◽  
Science Institute ◽  
Space Telescope Science Institute

scholarly journals The Environments of Markarian Galaxies

1990 ◽  
Vol 124 ◽  
pp. 165-167
Author(s):  
John W. MacKenty ◽  
Brian McLean ◽  
Caroline Simpson
Keyword(s):  
Hubble Space Telescope ◽  
Ultraviolet Excess ◽  
Nuclear Activity ◽  
Space Telescope ◽  
Star Catalog ◽  
Guide Star ◽  
The Relationship ◽  
Peculiar Galaxies

The extensively studied Markarian sample of 1500 ultraviolet excess galaxies contains many Seyfert, starburst, and peculiar galaxies. Using the 20 minute V plates obtained for the construction of the Hubble Space Telescope Guide Star Catalog, we have investigated the morphologies of the Markarian galaxies and the environments in which they are located. This paper reports on the relationship between the types of nuclear activity and the morphologies and environments of the Markarian galaxies.

scholarly journals Photometric Calibrators for All-Sky Surveys: The GSPC-II Program

1994 ◽  
Vol 161 ◽  
pp. 301-303
Author(s):  
A. Ferrari ◽  
E.D. Siciliano ◽  
A. Pizzuti ◽  
B. Bucciarelli ◽  
G. Massone ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Stellar Populations ◽  
Galactic Structure ◽  
Mission Planning ◽  
Space Telescope ◽  
Sky Surveys ◽  
Star Catalog ◽  
Wide Range ◽  
The Uk ◽  
Guide Star

Accurate astrometric and photometric calibrations of all-sky photographic surveys, such as the Palomar Quick-V survey and the UK SERC-J survey, digitised for the construction of the Hubble Space Telescope Guide Star Catalog, are of extreme astrophysical value. Their wide range of applications includes, for example, galactic structure, stellar populations, extragalactic studies, and deep sky catalogs for mission planning and telescope operations. The Guide Star Photometric Catalog (GSPC-I, Lasker et al. 1988) provides stellar calibration sequences, placed approximately in the center of each survey plate, with a limiting magnitude of V = 15 mag. The goal of our program is to extend these calibrators to V = 20 mag in the Johnson-Kron-Cousins B, V and R passbands, with an accuracy of 0.05 mag. This is accomplished by taking CCD frames centered on the faintest star of each GSPC-I sequence. Typically, both long and short exposures are acquired in each field in order to link the bright and faint ends of the sequence.

scholarly journals Uranus Science with Space Telescope

1982 ◽  
Vol 60 ◽  
pp. 259-274
Author(s):  
John Caldwell
Keyword(s):  
High Speed ◽  
First Generation ◽  
Space Environment ◽  
Space Telescope ◽  
Science Institute ◽  
Voyager 2 ◽  
Scientific Interaction ◽  
Space Telescope Science Institute

AbstractThe Space Telescope Observatory, scheduled for launch in 1985, is described. The advantages of the space environment and the consequent features of ST performance are given, with Uranus observations as examples. The first generation instruments, including two cameras, two spectrographs and a high speed photometer, are discussed. The Space Telescope Science Institute, which will manage the Observatory, is discussed briefly. The potential scientific interaction with the Voyager 2 encounter of Uranus is also considered.

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