2005MNRAS.357...49R

Query : 2005MNRAS.357...49R

2005MNRAS.357...49R - Mon. Not. R. Astron. Soc., 357, 49-55 (2005/February-2)

XMM-Newton observations of the ultra-compact binary RX J1914+24.

RAMSAY G., HAKALA P., WU K., CROPPER M., MASON K.O., CORDOVA F.A. and PRIEDHORSKY W.

Abstract (from CDS):

We present XMM-Newton observations of the 569-s-period system RX J1914+24 (V407 Vul). This period is believed to represent the binary orbital period making it an ultracompact binary system. By comparing the phase of the rise to maximum X-ray flux at various epochs (this includes observations made using ROSAT, ASCA and Chandra) we find that the system is spinning up at a rate of 3.17±0.07x10–12s/s. We find that the spectra soften as the X-ray flux declines towards the off-phase of the 569-s period. Further, the spectra are best fitted by an absorbed blackbody component together with a broad emission feature around 0.59 keV. This emission feature is most prominent at the peak of the on-phase. We speculate on its origin.

Abstract Copyright: 2005 RAS

Journal keyword(s): binaries: general - - stars: individual: RX J1914+24 - novae, cataclysmic variables - X-rays: stars

CDS comments: RX J1914+24 = RX J1914.4+2456, RX J0806+15 = RX J0806.3+1527. In Introduction, RX J0806+24 is probably a misprint for RX J0806+15.

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 - 2024 		#notes
1 V* ES Cet CV* 02 00 52.2358544184 -09 24 31.643735904   16.3   16.7 16.97 ~ 84 0
2 RX J0806.3+1527 XB* 08 06 22.9520149296 +15 27 31.002199488   20.7 20   21.2 ~ 144 0
3 RX J1914.4+2456 XB* 19 14 26.0922577338 +24 56 43.322660677           ~ 138 0

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