2005ApJ...623L.125K

Query : 2005ApJ...623L.125K

2005ApJ...623L.125K - Astrophys. J., 623, L125-L128 (2005/April-3)

A variable infrared counterpart to the soft gamma-ray repeater Sgr 1806-20.

KOSUGI G., OGASAWARA R. and TERADA H.

Abstract (from CDS):

We present K'-band (2.12 µm) imaging observations of the SGR 1806-20 field taken during its very active phase in mid-2004; these observations reveal brightening of sources within the Chandra X-ray error circle when compared with earlier images obtained in 2002. One source brightened by more than a factor of 2, and so we consider this to be the probable infrared counterpart to SGR 1806-20. The other two sources are located in close proximity to the probable counterpart and show marginal brightening, which may suggest that the high-energy photons emitted from the soft gamma-ray repeater (SGR) during its active phase have induced dust sublimation or brightening of the unresolved background around the SGR.

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Journal keyword(s): Gamma Rays: Bursts - Stars: Pulsars: Individual: Alphanumeric: SGR 1806-20 - Stars: Neutron - X-Rays: Stars

Nomenclature: Fig.2, Table 1: [EGH2001b] AN (Nos A1-A4, B1-B3, F1-F7) added.

Simbad objects: 23

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Number of rows : 23
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 PSR J0146+6145 Psr 01 46 22.21 +61 45 03.8   28.100 25.620     ~ 570 0
2 2E 2336 HXB 10 50 08.93 -59 53 19.9           Be 405 0
3 [EGH2001b] A * 18 08 39 -20 24.6           ~ 1 0
4 [EGH2001b] F5 * 18 08 39.21 -20 24 40.2           ~ 1 0
5 [EGH2001b] F7 * 18 08 39.223 -20 24 38.63           ~ 1 0
6 [EGH2001b] F6 * 18 08 39.229 -20 24 40.85           ~ 1 0
7 [EGH2001b] F4 * 18 08 39.257 -20 24 39.24           ~ 1 0
8 [EGH2001b] F3 * 18 08 39.277 -20 24 39.26           ~ 1 0
9 [EGH2001b] F2 * 18 08 39.290 -20 24 40.31           ~ 1 0
10 [EGH2001b] B * 18 08 39.3 -20 24 40           ~ 1 0
11 [EGH2001b] C * 18 08 39.319 -20 24 40.81           ~ 1 0
12 PSR J1808-2024 Psr 18 08 39.32 -20 24 40.1           ~ 1240 2
13 [EGH2001b] B3 * 18 08 39.329 -20 24 39.94           ~ 1 0
14 [EGH2001b] B1 * 18 08 39.340 -20 24 39.77           ~ 1 0
15 [EGH2001b] B2 * 18 08 39.343 -20 24 40.14           ~ 1 0
16 [EGH2001b] A3 * 18 08 39.358 -20 24 39.01           ~ 1 0
17 [EGH2001b] A2 * 18 08 39.369 -20 24 39.43           ~ 1 0
18 [EGH2001b] F1 * 18 08 39.382 -20 24 40.34           ~ 1 0
19 [EGH2001b] A4 * 18 08 39.383 -20 24 39.18           ~ 1 0
20 [EGH2001b] A1 * 18 08 39.386 -20 24 39.02           ~ 1 0
21 AX J1809.8-1943 Psr 18 09 51.07 -19 43 51.8           ~ 463 0
22 HD 185879 * 19 41 23.4123327360 -03 50 56.959884924   9.74 9.72     B8II/III 17 0
23 2E 4673 HXB 23 01 08.14 +58 52 44.5           ~ 633 1

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