Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-03-11
Astrophys.J. 623 (2005) L125-L128
Astronomy and Astrophysics
Astrophysics
Accepted for publication in ApJ Letters. (12 pages, 3 figures)
Scientific paper
10.1086/430171
We present K'-band (2.12 micron) imaging observations of the SGR 1806-20 field taken during its very active phase in mid 2004, which 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 for 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 SGR during its active phase have induced dust sublimation or brightening of the unresolved background around the SGR.
Kosugi George
Ogasawara Ryusuke
Terada Hiroshi
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