1994A&A...290L..29P

Query : 1994A&A...290L..29P

1994A&A...290L..29P - Astronomy and Astrophysics, volume 290L29-32 (1994/10-3)

ROSAT observation of the Sgr A region.

PREDEHL P. and TRUEMPER J.

Abstract (from CDS):

The Galactic Center has been observed with the ROSAT-PSPC for 50000sec. 15 sources were found within the central 30'x30', field. 1E1742.5-2859, the source commonly associated with Sgr A*, could be resolved into three individual objects, out of which at least one is a foreground object. One component of the 1E1742.5-2859 complex is coincident with Sgr A* within less than 10". This makes it to be likely the nucleus itself or a source in its immediate vicinity. The flux derived from the ROSAT observation is much less than one would expect on the basis of previous measurements at higher energies. In order to explain this discrepancy, we assume an X-ray absorption much excess of NH=5x1022cm–2, the expected value for the interstellar absorption towards the Galactic Center. There is an indication that at least a part of the apparently diffuse emission can be resolved into individual sources.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: center - X-rays: general - X-rays: ISM

Nomenclature: Figs 1, 2, Table 2: [PT94] NN (Nos 1-15).

CDS comments: [PT94] 15 is at the edge of the field, not in table 2.

Simbad objects: 20

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Number of rows : 20
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 RCW 138 HII 17 45 00.1 -28 51 25           ~ 11 0
2 NAME Sgr A Region reg 17 45 12 -28 48.3           ~ 955 0
3 RX J1745.3-2906 X 17 45 18.1 -29 06 21           ~ 2 0
4 1E 1742.2-2857 LXB 17 45 26.6 -28 59 00           ~ 9 0
5 HD 316224 * 17 45 30.0083437248 -29 07 04.285400268   10.59 10.16 10.10   F8 28 0
6 RX J1745.5-2859 X 17 45 32 -28 59.5           ~ 2 1
7 RX J1745.5-2905 CV* 17 45 32.4351328641 -29 05 53.653845352           ~ 11 0
8 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
9 GCIRS 16 Cl* 17 45 40.0 -29 00 28           ~ 387 0
10 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
11 2E 1742.5-2858 LXB 17 45 40.957 -29 00 14.16           ~ 30 0
12 RX J1745.7-2913 X 17 45 43.8 -29 13 13           ~ 1 0
13 CD-29 13941 * 17 45 43.9185025944 -29 04 56.644784040   11.93 11.72     F8 17 0
14 RX J1745.7-2858 X 17 45 45.6 -28 58 17           ~ 2 0
15 RX J1745.8-2852 X 17 45 50.7 -28 52 44           ~ 2 0
16 RX J1745.8-2907 X 17 45 52.5 -29 07 49           ~ 2 0
17 RX J1746.1-2859 CV* 17 46 07.52 -28 59 51.3       21.75   ~ 4 0
18 INTREF 837 LXB 17 46 09.70 -28 51 04.0           ~ 11 0
19 HD 316314 gD* 17 46 39.0790054848 -28 53 51.715699008   9.99 9.47     F0 22 0
20 [PT94] 15 X ~ ~           ~ 1 0

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