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

Full paper

View the references in ADS

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 - 2023	#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						~	180	2
14	2MASS J00424414+4117549	No*	00 42 44.144	+41 17 54.90				16.8		~	22	0
15	M 31	G	00 42 44.330	+41 16 07.50	4.86	4.36	3.44			~	12244	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			~	5665	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						~	6691	1
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		~	188	0
40	V* GQ Mus	No*	11 52 02.4296561952	-67 12 20.986391520						~	262	0
41	RX J1342.1+2822	CV*	13 42 09.75	+28 22 47.5						Ss	37	1
42	M 3	GlC	13 42 11.62	+28 22 38.2			6.39			~	2424	0
43	V* V4743 Sgr	No*	19 01 09.3393890856	-22 00 06.016418064						~	141	0
44	V* V1494 Aql	No*	19 23 05.3600241442	+04 57 19.811779912						~	158	0
45	V* V1974 Cyg	No*	20 30 31.6546001712	+52 37 50.837478240						~	569	0

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