2005A&A...442..879P

Query : 2005A&A...442..879P

2005A&A...442..879P - Astronomy and Astrophysics, volume 442, 879-894 (2005/11-2)

Optical novae: the major class of supersoft X-ray sources in M 31.

PIETSCH W., FLIRI J., FREYBERG M.J., GREINER J., HABERL F., RIFFESER A. and SALA G.

Abstract (from CDS):

We searched for X-ray counterparts of optical novae detected in M31 and M33. We combined an optical nova catalogue from the WeCAPP survey with optical novae reported in the literature and correlated them with the most recent X-ray catalogues from ROSAT, XMM-Newton, and Chandra, and - in addition - searched for nova correlations in archival data. We report 21 X-ray counterparts for novae in M31- mostly identified as supersoft sources (SSS) by their hardness ratios - and two in M33. Our sample more than triples the number of known optical novae with a supersoft X-ray phase. Most of the counterparts are covered in several observations allowing us to constrain their X-ray light curves. Selected brighter sources were classified by their XMM-Newton EPIC spectra. We use the well-determined start time of the SSS state in two novae to estimate the hydrogen mass ejected in the outburst to ∼10–5M☉ and ∼10–6M☉, respectively. The supersoft X-ray phase of at least 15% of the novae starts within a year. At least one of the novae shows a SSS state lasting 6.1-years after the optical outburst. Six of the SSSs turned on between 3 and 9 years after the optical discovery of the outburst and may be interpreted as recurrent novae. If confirmed, the detection of a delayed SSS phase turn-on may be used as a new method to classify novae as recurrent. At the moment, the new method yields a ratio of recurrent novae to classical novae of 0.3, which is in agreement (within the errors) with previous works.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual: M31 - galaxies: individual: M33 - stars: novae, cataclysmic variables - X-rays: galaxies - X-rays: binaries

Nomenclature: Table 2: [PFF2005] WeCAPP-NYYYY-NN N=5.

Errata: erratum vol.454, p.773 (2006)

CDS comments: Paragraph 3 EQ J004242+411323 is a misprint for EQ J004222+411323. In Table 2 [WS2004] 1995-1 and [WS2004] 1995-3 correspond to NOVA Tri 1995a and NOVA Tri 1995c in Simbad.

Simbad objects: 45

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Number of rows : 45
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 RX J0039.2+4001 X 00 39 16.5 +40 01 06           ~ 4 0
2 [O2006] SSS 3 No* 00 41 53.82 +41 07 22.5           ~ 6 0
3 M31N 1999-08e No* 00 42 22.30 +41 13 26.0           ~ 6 0
4 C84 25 X 00 42 22.394 +41 13 33.99           ~ 12 0
5 [FDC2002] J004233.79+411823.7 No* 00 42 33.89 +41 18 23.9       16.8   ~ 9 1
6 2MASS J00423442+4118106 No* 00 42 34.428 +41 18 10.64           ~ 13 1
7 [PFJ93] 33 X 00 42 34.98 +41 13 19.9           ~ 4 0
8 [CFN87] 2 No* 00 42 35.00 +41 13 22.0           ~ 7 0
9 [SI2001] 1990-08 No* 00 42 35.50 +41 13 48.0           ~ 5 0
10 [SI2001] 1997-06 No* 00 42 40.14 +41 15 46.7           ~ 6 0
11 RX J004241.6+411440 X 00 42 42.327 +41 14 45.54           ~ 12 0
12 CXOM31 J004242.1+411218 X 00 42 42.43 +41 12 19.2           ~ 9 0
13 V* S And No* 00 42 43.12368 +41 16 03.2124           ~ 183 2
14 2MASS J00424414+4117549 No* 00 42 44.144 +41 17 54.90       16.8   ~ 22 0
15 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12651 1
16 M31N 2000-08a No* 00 42 47.45 +41 15 07.7       18.6   ~ 12 0
17 M31N 1997-08b No* 00 42 50.38 +41 07 48.5           ~ 10 0
18 CXOM31 J004255.3+412045 No* 00 42 55.20 +41 20 46.0   17.5       ~ 16 0
19 M31N 1925-01a No* 00 42 55.41 +41 20 55.6   16.8 17.10     ~ 5 0
20 2MASS J00425938+4116461 No* 00 42 59.383 +41 16 46.14           ~ 15 0
21 M31N 1992-11b No* 00 43 00.70 +41 14 39.0           ~ 7 0
22 NAME Nova RJC99 Jul-98 No* 00 43 06.96 +41 18 09.9           ~ 17 1
23 Rosino 140 No* 00 43 13.40 +41 18 13.0   18.2 17.26     ~ 11 0
24 RX J0043.2+4123 X 00 43 15.6 +41 23 41           ~ 3 0
25 [VRJ2006] M31V-J00431638+4123376 No* 00 43 16.20 +41 23 38.0           ~ 6 0
26 [PFF2005] WeCAPP-N2001-08 No* 00 43 18.62 +41 09 49.1       18.7   ~ 8 0
27 M31N 1998-06a No* 00 43 28.76 +41 21 42.6     16.70     ~ 10 0
28 2MASS J00433294+4116150 * 00 43 32.9277133992 +41 16 15.058090452   17.38 16.86 16.491 16.163 ~ 3 0
29 [SI2001] 1991-12 No* 00 43 33.50 +41 16 22.0           ~ 5 0
30 RX J004404.8+411820 No* 00 44 04.71 +41 18 21.7           ~ 18 0
31 LGGS J004457.94+412343.9 QSO 00 44 58.10 +41 23 44.4 19.489 20.371 19.914 19.554 18.989 ~ 12 0
32 RX J004549.6+413603 X 00 45 49.6 +41 36 03           ~ 4 0
33 ShAl 57 No* 00 45 50.17 +41 36 06.1   16.6       ~ 5 0
34 M33N 1995-08a No* 01 33 47.1 +30 40 26           ~ 5 0
35 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5839 1
36 M33N 1995-09a No* 01 34 06.891 +30 37 16.82           ~ 5 0
37 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7067 0
38 LMCN 1995-02a No* 05 26 49.9444560367 -70 01 24.520835218           ~ 42 0
39 V* V382 Vel No* 10 44 48.3975221712 -52 25 31.168268472   15.945 15.737 16.173   ~ 192 0
40 V* GQ Mus No* 11 52 02.4296561952 -67 12 20.986391520           ~ 264 0
41 RX J1342.1+2822 CV* 13 42 09.75 +28 22 47.5           Ss 38 1
42 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2479 0
43 V* V4743 Sgr No* 19 01 09.3393890856 -22 00 06.016418064           ~ 146 0
44 V* V1494 Aql No* 19 23 05.3600241442 +04 57 19.811779912           ~ 160 0
45 V* V1974 Cyg No* 20 30 31.6546001712 +52 37 50.837478240           ~ 579 0

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