ROSAT Constraints on the Intermediate Polar Candidates V426-OPHIUCHI Sw-Ursae and 1H:0709-360

Details ROSAT Constraints on the Intermediate Polar Candidates V426-OPHIUCHI Sw-Ursae and 1H:0709-360 ROSAT Constraints on the Intermediate Polar Candidates V426-OPHIUCHI Sw-Ursae and 1H:0709-360

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.269..913r&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 269, NO. 4/AUG15, P. 913, 1994

Astronomy and Astrophysics

Astronomy

17

Scientific paper

ROSA T observations of three cataclysmic variables with disputed intermediate polar (DQ Her star) designations are presented. Pronounced variability, with possible time- scales of 12.5, 2.5 or 4.5 h, is seen in the X-ray light curve of V426 Oph; these variations may be accompanied by spectral changes. This system may have been caught in the decline from a dwarf nova outburst, being significantly brighter and softer during the early part of the observation. The previously reported orbital and rotational X-ray/optical periodicities in SW UMa were not detected in the ROSA T observations of this star: we place an upper limit of 20 per cent on the pulse fraction of any rotational modulation. Spectral analysis indicates that a two-temperature origin for the X-ray emission is probably appropriate. An X-ray imaging detection of the HEAO-1 source, 1H0709 -360, is also presented. The weak signal precludes a detailed spectral analysis, but we are able to place limits on the column to the source. When extrapolated to the 2-10 keV band, the constraints imposed by the ROSAT data yield a flux that is about two orders of magnitude fainter than that implied by the HEAO-1 detection. The intermediate polar classification of each of the three sources remains unconfirmed. Key words: stars: individual: V426 Oph - stars: individual: SW UMa - stars: individual: 1H0709 -360 - novae, cataclysmic variables - X-rays: stars.

Affiliated with

Also associated with

No associations

Rating

ROSAT Constraints on the Intermediate Polar Candidates V426-OPHIUCHI Sw-Ursae and 1H:0709-360 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with ROSAT Constraints on the Intermediate Polar Candidates V426-OPHIUCHI Sw-Ursae and 1H:0709-360, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ROSAT Constraints on the Intermediate Polar Candidates V426-OPHIUCHI Sw-Ursae and 1H:0709-360 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1237925