The ROTSE Project

Details The ROTSE Project The ROTSE Project

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.4815m&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #48.15; Bulletin of the American Astronomical Society, Vol. 29, p.1290

Astronomy and Astrophysics

Astronomy

5

Scientific paper

The ROTSE (Robotic Optical Transient Search Experiment) collaboration is constructing two independent detector systems to search for gamma-ray burst optical counterparts immediately following a trigger signal from satellite instruments such as BATSE. ROTSE-I is a four-fold array of telephoto lenses imaging to large format, cooled CCDs. The angular coverage is 16.4(deg) x 16.4(deg) with a limiting magnitude of m_v =~ 15 for a 5-second exposure. This system is installed at the Los Alamos National Laboratory at a temporary site east of the LAMPF accelerator. Automated operation will begin in early 1998. A more ambitious system is called ROTSE-II. It consists of two 0.45 m aperture telescopes with f ratios of 1.9. Each telescope covers a field of view of 1.9(deg) x 1.9(deg) and is expected to achieve a limiting magnitude of m_v =~ 18 for a 10-second exposure. By scanning around the most probable burst location, a 16(deg) x 16(deg) error box can be searched in 16 minutes. More accurate initial coordinates will permit faster scans or deeper images. Delivery of the first ROTSE-II telescope is scheduled for November, 1997. By co-adding frames, both ROTSE-I and ROTSE-II will be able to detect objects considerably fainter than the limits quoted above. In particular, ROTSE-II should be able to find optical transients at the levels discovered for GRB 970228 and GRB 970508. The status of observations will be discussed.

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