Further improved X-ray position and possible optical/nIR counterpart for XTE J1637-489

Details Further improved X-ray position and possible optical/nIR counterpart for XTE J1637-489 Further improved X-ray position and possible optical/nIR counterpart for XTE J1637-489

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atel.1704....1s&link_type=abstract

The Astronomer's Telegram, #1704

Astronomy and Astrophysics

Astronomy

1

Infra-Red, Optical, X-Ray, Transients

Scientific paper

We report a further refinement of the position of the recently discovered X-ray transient XTE J1637-498 (Markwardt, Pereira and Swank, ATEL #1699). Using 1 ks of Swift XRT Photon Counting mode data and 3 Swift UVOT v band images from the observation described in Wijnands et al. (ATEL #1700), we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue) of RA, Dec = 249.26112, -49.86128 deg which is equivalent to: RA (J2000): 16 37 2.67 Dec (J2000): -49 51 40.6 with an uncertainty of 1.8 arcsec (radius, 90% confidence).

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