2002A&A...389..439N


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.16CEST16:44:16

2002A&A...389..439N - Astronomy and Astrophysics, volume 389, 439-445 (2002/7-2)

First optical identification of a supersoft X-ray source in M31.

NEDIALKOV P., ORIO M., BIRKLE K., CONSELICE C., DELLA VALLE M., GREINER J., MAGNIER E. and TIKHONOV N.A.

Abstract (from CDS):

We propose the first association of an optical counterpart with a luminous supersoft X-ray source in M31, RX J0044.0+4118, observed with ROSAT in July 1991. The PSPC position is at 1.6'' angular distance from a candidate nova in outburst in September of 1990. This is interesting because the incidence of classical novae among supersoft X-ray sources is an open question. The proposed optical counterpart was measured at R≃17.7 in September of 1990, and it had faded to R>19.2 when it was observed again after 70 days. The light curve was too sparsely monitored for definite conclusions on the speed class of the nova. No other variable objects with V<23.5 were found in the ROSAT spatial error box. We evaluate that the probability that a classical or recurrent nova was in outburst in the ROSAT error box in the few years preceding the observation is very small, so the proposed identification is meaningful. We also show evidence that the associated supersoft X-ray source turned off in the third year after the outburst.

Abstract Copyright:

Journal keyword(s): stars: novae, cataclysmic variables - X-rays: stars

VizieR on-line data: <Available at CDS (J/A+A/389/439): table3.dat table3.tex>

Nomenclature: [NOB2002] a (No. n>. Table 3: [NOB2002] NN (Nos 1-86).

CDS comments: Table 3 : k282 = [WB92a] 282.

Simbad objects: 92

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Number of rows : 92

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 [B68] 20 No* 00 42 34.23 +41 09 58.1     17.10     ~ 4 0
2 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10916 1
3 M31N 1993-10g No* 00 42 47.70 +41 18 01.0   16.35 16.30     ~ 11 0
4 Rosino 80 No* 00 42 57.50 +41 11 17.0   17.4 17.40     ~ 9 0
5 NAME M31PSS CV* 00 43 19.59 +41 17 56.9           ~ 22 0
6 [NOB2002] 75 * 00 44 03.49 +41 18 21.6     22.03     ~ 1 0
7 [MLV92] 265643 * 00 44 03.50 +41 18 24.4     21.75     ~ 1 0
8 [NOB2002] 83 * 00 44 03.59 +41 18 13.5           ~ 1 0
9 [NOB2002] 78 * 00 44 03.62 +41 18 13.4   23.44 22.97     ~ 1 0
10 [MLV92] 265294 * 00 44 03.66 +41 18 18.1           ~ 1 0
11 [MLV92] 265573 * 00 44 03.76 +41 18 22.3     22.68     ~ 1 0
12 [NOB2002] 38 * 00 44 03.87 +41 18 16.2     22.93     ~ 1 0
13 [NOB2002] 72 * 00 44 03.90 +41 18 09.9     22.45     ~ 1 0
14 [MLV92] 264754 * 00 44 03.926 +41 18 10.80   22.2 21.6     ~ 1 0
15 [NOB2002] 71 * 00 44 03.95 +41 18 09.4           ~ 1 0
16 [MLV92] 265764 * 00 44 03.96 +41 18 25.7   22.92 21.93     ~ 1 0
17 [NOB2002] 50 * 00 44 03.98 +41 18 28.2   22.39 22.65     ~ 1 0
18 [NOB2002] 67 * 00 44 03.99 +41 18 09.5     22.19     ~ 1 0
19 [NOB2002] 52 * 00 44 04.05 +41 18 11.1   23.00 22.64     ~ 1 0
20 [MLV92] 265895 * 00 44 04.12 +41 18 28.3           ~ 1 0
21 [NOB2002] 29 * 00 44 04.29 +41 18 11.8   22.96 22.22     ~ 1 0
22 [NOB2002] 17 * 00 44 04.35 +41 18 14.4     22.58     ~ 1 0
23 [MLV92] 265325 * 00 44 04.4264165586 +41 18 19.019636695   20.00 19.21 18.744 18.44 ~ 1 0
24 [NOB2002] 56 * 00 44 04.44 +41 18 32.0           ~ 1 0
25 [NOB2002] 11 * 00 44 04.45 +41 18 15.5     22.83     ~ 1 0
26 [MLV92] 264388 * 00 44 04.46 +41 18 05.8     21.73     ~ 1 0
27 [MLV92] 266128 * 00 44 04.46 +41 18 31.1   22.53 21.84     ~ 1 0
28 [MLV92] 264615 * 00 44 04.50 +41 18 08.8   23.18 21.66     ~ 1 0
29 [NOB2002] 74 * 00 44 04.54 +41 18 06.1   22.44 22.24     ~ 1 0
30 [NOB2002] 6 * 00 44 04.59 +41 18 24.0   22.39 22.74     ~ 1 0
31 [NOB2002] 23 HII 00 44 04.640 +41 18 11.44   23.39 22.97     ~ 3 0
32 [MLV92] 264909 * 00 44 04.64 +41 18 13.5           ~ 1 0
33 [NOB2002] 1 * 00 44 04.65 +41 18 20.7     22.78     ~ 1 0
34 [NOB2002] 54 * 00 44 04.68 +41 18 08.1   23.33 22.43     ~ 1 0
35 [NOB2002] 20 * 00 44 04.68 +41 18 12.6   22.67 23.04     ~ 1 0
36 [NOB2002] 58 * 00 44 04.70 +41 18 32.6   23.80 22.96     ~ 1 0
37 [NOB2002] n * 00 44 04.709 +41 18 21.64   18.40 18.2 17.70 17.37 ~ 1 1
38 RX J004404.8+411820 No* 00 44 04.71 +41 18 21.7           ~ 18 0
39 [NOB2002] 19 * 00 44 04.78 +41 18 12.6     23.09     ~ 1 0
40 [NOB2002] 39 * 00 44 04.80 +41 18 31.0     23.69     ~ 1 0
41 [NOB2002] 43 * 00 44 04.92 +41 18 31.4   23.19 22.32     ~ 1 0
42 [NOB2002] 22 * 00 44 04.94 +41 18 28.5           ~ 1 0
43 [NOB2002] 3 * 00 44 05.00 +41 18 17.7           ~ 1 0
44 [NOB2002] 18 * 00 44 05.05 +41 18 27.0   22.97 22.87     ~ 1 0
45 [NOB2002] 27 * 00 44 05.07 +41 18 29.4     22.13     ~ 1 0
46 [MLV92] 265443 * 00 44 05.09 +41 18 20.6   22.68 22.57     ~ 1 0
47 [NOB2002] 60 * 00 44 05.14 +41 18 32.2   23.87 22.68     ~ 1 0
48 [MLV92] 265565 * 00 44 05.16 +41 18 23.4   23.09 22.07     ~ 1 0
49 [NOB2002] 7 * 00 44 05.19 +41 18 21.5   22.92 21.89     ~ 1 0
50 [MLV92] 265221 * 00 44 05.204 +41 18 17.60   21.7 21.291 20.6 20.07 ~ 1 0
51 [NOB2002] 86 * 00 44 05.22 +41 18 06.3           ~ 1 0
52 [NOB2002] 41 * 00 44 05.22 +41 18 10.4           ~ 1 0
53 [NOB2002] 10 * 00 44 05.22 +41 18 17.6   22.37 21.90     ~ 1 0
54 [NOB2002] 45 * 00 44 05.24 +41 18 10.1     22.89     ~ 1 0
55 [NOB2002] 12 * 00 44 05.28 +41 18 17.5           ~ 1 0
56 [NOB2002] 13 * 00 44 05.31 +41 18 17.3   22.55 22.44     ~ 1 0
57 [NOB2002] 34 * 00 44 05.31 +41 18 28.7           ~ 1 0
58 [NOB2002] 55 * 00 44 05.34 +41 18 30.7     22.90     ~ 1 0
59 [MLV92] 266223 * 00 44 05.34 +41 18 33.2   22.96 21.78     ~ 1 0
60 [NOB2002] 15 * 00 44 05.35 +41 18 22.8   23.06 22.45     ~ 1 0
61 [NOB2002] 16 * 00 44 05.40 +41 18 18.5   22.70 22.52     ~ 1 0
62 [NOB2002] 37 * 00 44 05.41 +41 18 12.5   22.67 23.15     ~ 1 0
63 [NOB2002] 24 * 00 44 05.46 +41 18 16.3   23.84 22.73     ~ 1 0
64 [NOB2002] 21 * 00 44 05.46 +41 18 18.2           ~ 1 0
65 [NOB2002] 28 * 00 44 05.48 +41 18 14.5     22.85     ~ 1 0
66 [MLV92] 265076 * 00 44 05.48 +41 18 15.2           ~ 1 0
67 [NOB2002] 51 * 00 44 05.50 +41 18 11.4   23.04 22.43     ~ 1 0
68 [NOB2002] 33 * 00 44 05.50 +41 18 13.5           ~ 1 0
69 [MLV92] 265711 * 00 44 05.51 +41 18 25.3     23.15     ~ 1 0
70 [NOB2002] 25 * 00 44 05.58 +41 18 18.0   23.14 22.84     ~ 1 0
71 [NOB2002] 32 * 00 44 05.60 +41 18 17.0           ~ 1 0
72 [NOB2002] 69 * 00 44 05.60 +41 18 30.4   24.13 22.67     ~ 1 0
73 [NOB2002] 65 * 00 44 05.62 +41 18 11.5   23.39 23.34     ~ 1 0
74 [NOB2002] 42 * 00 44 05.62 +41 18 14.8           ~ 1 0
75 [NOB2002] 31 * 00 44 05.62 +41 18 22.6           ~ 1 0
76 [NOB2002] 36 * 00 44 05.65 +41 18 16.6     22.73     ~ 1 0
77 [NOB2002] 48 * 00 44 05.66 +41 18 14.5   23.66 23.04     ~ 1 0
78 [MLV92] 265816 * 00 44 05.6782266977 +41 18 26.555786736   20.69 20.64 20.6 20.3 ~ 1 0
79 [NOB2002] 64 * 00 44 05.68 +41 18 28.0   23.20 22.72     ~ 1 0
80 [NOB2002] 44 * 00 44 05.72 +41 18 16.3           ~ 1 0
81 [NOB2002] 73 * 00 44 05.77 +41 18 11.7           ~ 1 0
82 [MLV92] 265353 * 00 44 05.86 +41 18 19.6   23.42 22.39     ~ 1 0
83 [NOB2002] 61 * 00 44 05.89 +41 18 19.9           ~ 1 0
84 [MLV92] 265485 * 00 44 05.89 +41 18 22.2           ~ 1 0
85 [MLV92] 265728 * 00 44 05.89 +41 18 25.1   23.33 22.73     ~ 1 0
86 [NOB2002] 68 * 00 44 05.90 +41 18 25.2           ~ 1 0
87 [NOB2002] 77 * 00 44 05.90 +41 18 26.8     22.44     ~ 1 0
88 [NOB2002] 81 * 00 44 05.99 +41 18 15.3   23.05 22.61     ~ 1 0
89 [NOB2002] 70 * 00 44 05.99 +41 18 21.8     22.53     ~ 1 0
90 [NOB2002] 76 * 00 44 06.04 +41 18 18.8   23.47 22.37     ~ 1 0
91 [NOB2002] 79 * 00 44 06.05 +41 18 21.8     22.67     ~ 1 0
92 [NOB2002] 84 * 00 44 06.06 +41 18 18.2           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.07.16-16:44:16

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