1995A&A...294L...1B

Query : 1995A&A...294L...1B

1995A&A...294L...1B - Astronomy and Astrophysics, volume 294L1-4 (1995/2-1)

Discovery of a galactic supersoft binary X-ray source.

BEUERMANN K., REINSCH K., BARWIG H., BURWITZ V., DE MARTINO D., MANTEL K.-H., PAKULL M.W., ROBINSON E.L., SCHWOPE A.D., THOMAS H.-C., TRUEMPER J., VAN TEESELING A. and ZHANG E.

Abstract (from CDS):

We report the discovery of the galactic very soft ('supersoft') X-ray source RX J0019.8+2156 and its 12.2mag optical counterpart. The system displays quasi-sinusoidal modulations of the optical, UV, and X-ray light curves as well as regular radial-velocity variations with a 15.85 hour period which we interpret as the binary orbital period. The system shows little long-term variability (1990-1993) in the optical, W, and X-ray bands. The hot component may be a white dwarf which accretes at a rate of ∼10–7M☉/yr near the limit of stable burning of hydrogen. The system may currently be in a low state between weak shell flashes.

Abstract Copyright: ∼

Journal keyword(s): accretion - X-rays: general - binaries: close - stars: individual: RX J0019.8+2156 - white dwarfs

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* QR And CV* 00 19 49.9252996176 +21 56 52.169584416   12.38 12.73 11.86   Ss 139 0
2 SV* HV 5682 XB* 05 13 50.7835871075 -69 51 47.483214339     16.566 16.606 16.62 ~ 321 0
3 2E 1550 XB* 05 43 34.1600044704 -68 22 22.191505716   15.9   17.2 16.54 ~ 332 0

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