2003ApJ...588..792H

Query : 2003ApJ...588..792H

2003ApJ...588..792H - Astrophys. J., 588, 792-800 (2003/May-2)

Chandra observation of the X-ray source population of NGC 6946.

HOLT S.S., SCHLEGEL E.M., HWANG U. and PETRE R.

Abstract (from CDS):

We present the results of a study of discrete X-ray sources in NGC 6946 using a deep Chandra ACIS observation. Based on the slope of the logN-logS distribution and the general correlation of sources with the spiral arms, we infer that the overall discrete source sample in NGC 6946 is dominated by high-mass X-ray binaries, in contrast to the source distributions in M31 and the Milky Way. This is consistent with the higher star formation rate in NGC 6946 than in those galaxies. We find that the strong X-ray sources in the region of the galactic center do not correlate in detail with images of the region in the near-IR, although one of them may be coincident with the galactic center. The noncentral ultraluminous X-ray source in NGC 6946, previously identified with a supernova remnant, has an X-ray spectrum and luminosity that is inconsistent with either a traditional pulsar wind nebula or a blast wave remnant.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Individual: NGC Number: NGC 6946 - X-Rays: Binaries - X-Rays: Galaxies - X-Rays: General

Nomenclature: Table 1: [HSH2003] NN (Nos 1-72).

Simbad objects: 82

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Number of rows : 82
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
3 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
4 NGC 2060 SNR 05 37 51.4466169456 -69 10 23.947092084   9.69 9.59     ~ 380 2
5 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
6 SN 1988Z SN* 10 51 50.10 +16 00 00.5   16.8       SNIIn 385 1
7 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
8 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
9 [HSH2003] 2 Rad 20 34 19.0 +60 10 10           ~ 3 0
10 [LB2005] NGC 6946 X9 X 20 34 25.95 +60 09 09.7           ~ 4 0
11 [RW2000] NGC 6946 X-2 X 20 34 34.86 +60 10 33.3           ~ 4 0
12 [HSH2003] 13 SR? 20 34 36.1 +60 08 39           ~ 6 0
13 [HSH2003] 14 Rad 20 34 36.4 +60 05 58           ~ 2 0
14 [HSH2003] 15 SNR 20 34 36.48 +60 09 30.4           ~ 18 0
15 [HSH2003] 19 HII 20 34 39.8 +60 08 22           ~ 3 0
16 [HSH2003] 21 SNR 20 34 41.39 +60 08 46.3           ~ 9 0
17 [HSH2003] 28 Rad 20 34 47.5 +60 10 03           ~ 2 0
18 [HSH2003] 32 X 20 34 48.7 +60 05 49           ~ 3 0
19 [HSH2003] 37 SR? 20 34 49.7 +60 08 06           ~ 4 0
20 [LDG97] 47 SNR 20 34 50.80 +60 07 47.9           ~ 6 0
21 [FHL2008] NGC 6946 45 SNR 20 34 50.94 +60 10 20.6           ~ 10 0
22 RX J2034.8+6009 UX? 20 34 52.30 +60 09 11.7           ~ 12 0
23 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
24 [HSH2003] 48 Rad 20 34 53.4 +60 10 55           ~ 3 0
25 [SST2011] J203456.49+600834.1 UX? 20 34 56.49 +60 08 34.0           ~ 7 0
26 [HSH2003] 51 HII 20 34 56.6 +60 08 20           ~ 3 0
27 [HSH2003] 53 X 20 34 57.8 +60 09 47           ~ 2 0
28 SN 1968D SN* 20 34 58.40 +60 09 34.4   13.5 13.5     SNII 74 1
29 IXO 85 UX? 20 35 00.11 +60 09 08.5           ~ 27 1
30 NAME NGC 6946 SNR SNR 20 35 00.74 +60 11 30.6           ~ 117 0
31 [LB2005] NGC 6946 X3 X 20 35 01.52 +60 10 07.2           ~ 6 0
32 [HSH2003] 61 Rad 20 35 04.6 +60 11 18           ~ 2 0
33 [HSH2003] 65 SNR 20 35 08.08 +60 11 13.1           ~ 9 0
34 [LB2005] NGC 6946 X7 X 20 35 11.81 +60 07 30.9           ~ 3 0
35 [LB2005] NGC 6946 X11 X 20 35 17.88 +60 10 56.2           ~ 3 0
36 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1
37 [HSH2003] 55 X ~ ~           ~ 1 0
38 [HSH2003] 57 X ~ ~           ~ 1 0
39 [HSH2003] 60 X ~ ~           ~ 1 0
40 [HSH2003] 62 X ~ ~           ~ 1 0
41 [HSH2003] 63 X ~ ~           ~ 1 0
42 [HSH2003] 67 X ~ ~           ~ 1 0
43 [HSH2003] 69 X ~ ~           ~ 1 0
44 [HSH2003] 70 X ~ ~           ~ 1 0
45 [HSH2003] 71 X ~ ~           ~ 1 0
46 [HSH2003] 72 X ~ ~           ~ 1 0
47 [HSH2003] 64 X ~ ~           ~ 1 0
48 [HSH2003] 1 X ~ ~           ~ 1 0
49 [HSH2003] 3 X ~ ~           ~ 1 0
50 [HSH2003] 4 X ~ ~           ~ 1 0
51 [HSH2003] 5 X ~ ~           ~ 1 0
52 [HSH2003] 7 X ~ ~           ~ 1 0
53 [HSH2003] 8 X ~ ~           ~ 1 0
54 [HSH2003] 9 X ~ ~           ~ 1 0
55 [HSH2003] 10 X ~ ~           ~ 1 0
56 [HSH2003] 12 X ~ ~           ~ 1 0
57 [HSH2003] 16 X ~ ~           ~ 1 0
58 [HSH2003] 17 X ~ ~           ~ 1 0
59 [HSH2003] 18 X ~ ~           ~ 1 0
60 [HSH2003] 20 X ~ ~           ~ 1 0
61 [HSH2003] 22 X ~ ~           ~ 1 0
62 [HSH2003] 23 X ~ ~           ~ 1 0
63 [HSH2003] 24 X ~ ~           ~ 1 0
64 [HSH2003] 25 X ~ ~           ~ 1 0
65 [HSH2003] 26 X ~ ~           ~ 1 0
66 [HSH2003] 27 X ~ ~           ~ 1 0
67 [HSH2003] 29 X ~ ~           ~ 1 0
68 [HSH2003] 30 X ~ ~           ~ 1 0
69 [HSH2003] 31 X ~ ~           ~ 1 0
70 [HSH2003] 33 X ~ ~           ~ 1 0
71 [HSH2003] 34 X ~ ~           ~ 1 0
72 [HSH2003] 35 X ~ ~           ~ 1 0
73 [HSH2003] 36 X ~ ~           ~ 1 0
74 [HSH2003] 38 X ~ ~           ~ 1 0
75 [HSH2003] 39 X ~ ~           ~ 1 0
76 [HSH2003] 40 X ~ ~           ~ 1 0
77 [HSH2003] 41 X ~ ~           ~ 1 0
78 [HSH2003] 44 X ~ ~           ~ 1 0
79 [HSH2003] 46 X ~ ~           ~ 1 0
80 [HSH2003] 47 X ~ ~           ~ 1 0
81 [HSH2003] 49 X ~ ~           ~ 1 0
82 [HSH2003] 52 X ~ ~           ~ 1 0

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