2009MNRAS.395..416R

Query : 2009MNRAS.395..416R

2009MNRAS.395..416R - Mon. Not. R. Astron. Soc., 395, 416-421 (2009/May-1)

2XMMiJ225036.9+573154 - a new eclipsing AMHer binary discovered using XMM-newton.

RAMSAY G., ROSEN S., HAKALA P. and BARCLAY T.

Abstract (from CDS):

We report the discovery of an eclipsing polar, 2XMMi J225036.9+573154, using XMM-Newton. It was discovered by searching the light curves in the 2XMMi catalogue for objects showing X-ray variability. Its X-ray light curve shows a total eclipse of the white dwarf by the secondary star every 174min. An extended pre-eclipse absorption dip is observed in soft X-rays at φ = 0.8-0.9, with evidence for a further dip in the soft X-ray light curve at φ ∼ 0.4. Further, X-rays are seen from all orbital phases (apart from the eclipse) which make it unusual amongst eclipsing polars. We have identified the optical counterpart, which is faint (r = 21), and shows a deep eclipse (>3.5mag in white light). Its X-ray spectrum does not show a distinct soft X-ray component which is seen in many, but not all, polars. Its optical spectrum shows Hα in emission for a fraction of the orbital period.

Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): binaries: close - stars: individual: 2XMMi J225036.9+573154 - novae, cataclysmic variables - X-rays: binaries

Simbad objects: 14

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Number of rows : 14
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* FL Cet CV* 01 55 43.4035163686 +00 28 07.157350911   15.682 15.446 15.848   ~ 63 0
2 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
3 V* V1309 Ori CV* 05 15 41.4123253872 +01 04 40.481073984           M0.5 116 0
4 V* BY Cam CV* 05 42 48.8013535344 +60 51 31.376128608   16.60       ~ 270 0
5 V* V654 Aur CV* 07 29 10.6869194232 +36 58 38.239584924           ~ 12 0
6 V* EU Lyn CV* 07 52 40.4510831064 +36 28 23.216489076           ~ 20 0
7 2XMM J131223.4+173659 CV* 13 12 23.4769193064 +17 36 59.185421388           ~ 18 0
8 V* V1237 Her CV* 17 00 53.2970413128 +40 03 57.805683552           ~ 22 0
9 V* V2301 Oph CV* 18 00 35.5317201576 +08 10 13.920836628           ~ 107 0
10 V* V1432 Aql CV* 19 40 11.4199326288 -10 25 25.771706256     14.40 15.437   ~ 181 0
11 V* CD Ind CV* 21 15 41.0450813472 -58 40 54.058462428           ~ 108 0
12 2XMMi J225036.9+573154 CV* 22 50 36.9618889265 +57 31 54.181923564           ~ 4 0
13 GSC 03992-01862 ** 22 50 37.971480 +57 31 27.09228   11.66 11.07 10.88   ~ 2 0
14 SNR G107.5-01.5 SNR 22 52 +57.7           ~ 18 0

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