Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasp..106..417b&link_type=abstract
Publications of the Astronomical Society of the Pacific, vol. 106, no. 698, p. 417-422
Astronomy and Astrophysics
Astronomy
5
Astrometry, Astronomical Photometry, Calibrating, Guidance Sensors, Hubble Space Telescope, Photomultiplier Tubes, Graphs (Charts), Stability
Scientific paper
This paper presents the results of the photometric calibration of the F583W filter in the astrometer Fine Guidance Sensor on the Hubble Space Telescope. Dozens of observations of the 9.58 mag Fine Guidance Sensor (FGS) transfer mode reference star Upgren 69 (in the cluster NGC 188) have been utilized to verify the consistency and demonstrate the temporal stability of the photomultipliers. The measurements which provided the material for a transformation from the FGS instrumental system to the Johnson V magnitude consisted of the extensive position mode observations performed during the Optical Field Angle Distortion calibration. A total of 588 measurements of 92 stars in the galactic cluster M35 were performed. Johnson V band photometry with a precision (i.e., random errors) of plus or minus 0.05 mag is available with an accuracy (i.e., systematic errors) of 0.05 mag over 2 yr.
Bucciarelli Beatrice
Holfeltz Sherie T.
Lattanzi Mario G.
Taff Laurence G.
Vener-Saavedra P. C.
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