OMC: An Optical Monitoring Camera for INTEGRAL

Details OMC: An Optical Monitoring Camera for INTEGRAL OMC: An Optical Monitoring Camera for INTEGRAL

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.552..729m&link_type=abstract

Proceedings of the 5th INTEGRAL Workshop on the INTEGRAL Universe (ESA SP-552). 16-20 February 2004, Munich, Germany. Scientific

Physics

Optics

3

Scientific paper

The Optical Monitoring Camera (OMC) is observing the optical emission from the prime targets of the gamma- ray instruments onboard the ESA mission INTEGRAL, with the support of the JEM-X monitor in the X-ray do- main. This capability provides invaluable diagnostic in- formation on the nature and the physics of the sources over a broad wavelength range. Its main scientific ob- jectives are: (1) to monitor the optical emission from the sources observed by the gamma- and X-ray instruments, measuring the time and intensity structure of the optical emission for comparison with variability at high energies, and (2) to provide the brightness and position of the opti- cal counterpart of any gamma- or X-ray transient taking place within its field of view. The OMC is based on a re- fractive optics with an aperture of 50 mm focused onto a large format CCD (1024 × 2048 pixels) working in frame transfer mode (1024 × 1024 pixels imaging area). With a field of view of 5° ×5° OMC is able to monitor sources down to magnitude V = 18. Typical observations are performing a sequence of different integration times, allowing for photometric uncertainties below 0.1 magni- tude for objects with V ≤ 16. Key words: Optical photometry; optical space telescopes; variable stars.

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