RX J0806.3+1527 stellar binary system

Image shows U and R filter images of the sky field around RX J0806.3+1527 (at centre of circle), obtained with the FORS2 multi-mode instrument on VLT KUEYEN. The object is brightest at the shorter wavelength (U-band) - reflecting its very high temperature. The image is reproduced from FORS2-exposures, obtained in November 1999 in the U- and R-bands, and both lasting 300 seconds. The field measures 2.0 x 1.5 arcmin².