WISE Sees Stars

Details WISE Sees Stars WISE Sees Stars

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21560412i&link_type=abstract

American Astronomical Society, AAS Meeting #215, #604.12; Bulletin of the American Astronomical Society, Vol. 36, p.1129

Physics

Optics

Scientific paper

The Wide-field Infrared Survey Explorer (WISE) launched into orbit on 2009 Dec. 14. WISE is designed to map the entire sky at 3.4, 4.6, 12, and 22 microns, with sensitivity hundreds to hundreds of thousands of times better than previous all sky infrared surveys in these bands. The sky will be completely covered in 6 months of surveying, and we expect the cryogen life to permit a second survey of half the sky, ending in October 2010. The preliminary data release is planned for 6 months after the end of the survey ( April 2011) with the final data release 11 months later ( March 2012). The one month in-orbit checkout of WISE is proceeding extremely well. The aperture cover was successfully ejected on 2009 Dec. 29, and some images were taken with the satellite inertially fixed, in order to help calibrate the spacecraft pointing. One of these images is presented here, showing that the WISE optics are producing good images when staring. The approximate point source FWHM is two pixels in the 3.4, 4.6 and 12 micron bands, and 4 pixels in the 22 micron band, where the pixel size is 2.75 arcsec. The WISE survey will be done with the satellite continuously scanning, while an internal scan mirror creates freeze-frame images, and the team is working now to match these two motions precisely. The survey is expected to begin later this month.

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