Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...122...57h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 122, no. 1-2, June 1983, p. 57-63.
Astronomy and Astrophysics
Astrophysics
3
Astrometry, Micrometers, Reference Stars, Digital Filters, Signal To Noise Ratios, Sky Brightness, Stellar Magnitude
Scientific paper
Observation of stars fainter than the traditional limit of mv = 10 for visual meridian circles is important e.g. for obtaining reference stars for quasars. A photoelectric slit micrometer with slits moving at a speed v = 30arcsec/s relative to the star will have about the same limiting magnitude if the star has to be detected at each individual slit. It is shown here that the limit can be improved to mv = 12 to 13 for 75s observing time if an evaluation of the photon record by a numerical "multimedian" filter is used and if the dark current of the photomultiplier is about 5 Hz. The sky background needs not be extremely dark since 19 mag arc s-2 is sufficient. Theory and algorithm have been developed and implementation is suggested.
No associations
LandOfFree
Observation of faint stars by a slit micrometer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Observation of faint stars by a slit micrometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observation of faint stars by a slit micrometer will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1503708