HR 4289 - an X-ray luminous galaxy close to the bright star.

Details HR 4289 - an X-ray luminous galaxy close to the bright star. HR 4289 - an X-ray luminous galaxy close to the bright star.

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...313..755h&link_type=abstract

Astronomy and Astrophysics, v.313, p.755-758

Astronomy and Astrophysics

Astrophysics

5

Stars: Individual: Hr 4289, Galaxies: Starburst, X-Rays: Galaxies, X-Rays: Stars

Scientific paper

Using new optical, UV and X-ray observations we show that the K5 III star HR 4289, formerly believed to be the only ROSAT All-Sky survey detection to the right of the coronal diving line, should not be identified with the X-ray source. Pointed ROSAT PSPC observations demonstrate that the X-ray source is slightly extended, and locate the X-ray source 30" northwest of HR 4289 at the position of a hitherto unknown 15nag galaxy. The X-ray spectrum can well be fitted with a Raymond-Smith model for a thermal plasma at 6(+/-2)x10^6^K and a hydrogen column density of N_H_=3(+/-2)x10^21^cm^-2^. At a distance of z=0.016 (96 h_50_^-1^Mpc), the galaxy has an X-ray luminosity of L_x_=1.4x10^42^h_50_^-2^erg/s between 0.1 and 2.4keV.

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