ar X iv : a st ro - p h / 05 03 28 0 v 1 1 1 M ar 2 00 5 A VARIABLE INFRARED COUNTERPART TO THE SOFT GAMMA - RAY REPEATER SGR 1806 – 20 1
نویسندگان
چکیده
We present K -band (2.12 μm) 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. Subject headings: gamma rays: bursts — stars: neutron — X-rays: stars — pulsars: individual (SGR 1806–20)
منابع مشابه
ar X iv : a st ro - p h / 04 05 13 5 v 1 7 M ay 2 00 4 1 THE INTEGRAL VIEW OF THE SOFT GAMMA - RAY REPEATER SGR
We present the results obtained by INTEGRAL on the Soft-Gamma Ray Repeater SGR 1806–20. In particular we report on the temporal and spectral properties of the bursts detected during a moderately active period of the source in September and October 2003 and on the search for quiescent emission.
متن کاملar X iv : a st ro - p h / 95 02 03 8 v 1 7 F eb 1 99 5 A Luminous Companion to SGR 1806 − 20 1
We have obtained infrared spectra of the star suggested to be the counterpart of the soft γ-ray repeater (SGR) 1806−20. We found strong emission lines similar to those seen in the spectra of the rare Luminous Blue Variables and B[e] stars. A He I absorption line is also seen, from which we infer a spectral type O9–B2. This classification, in combination with the minimum distance of ∼ > 6 kpc in...
متن کاملar X iv : a st ro - p h / 99 04 24 4 v 1 1 9 A pr 1 99 9 Is SGR 1900 + 14 a Magnetar ?
We present RXTE observations of the soft gamma–ray repeater SGR
متن کاملar X iv : a st ro - p h / 99 04 24 4 v 2 3 J un 1 99 9 Is SGR 1900 + 14 a Magnetar ?
We present RXTE observations of the soft gamma–ray repeater SGR
متن کاملar X iv : a st ro - p h / 02 01 09 3 v 1 7 J an 2 00 2 Mid - infrared observations of the SGR 1900 + 14 error box
We report on mid-infrared observations of the compact stellar cluster located in the proximity of SGR 1900+14, and the radio/X-ray position of this soft-gamma repeater. Observations were performed in May and June of 2001 when the bursting source was in an active state. At the known radio and X-ray position of the SGR we did not detect transient mid-IR activity, although the observations were pe...
متن کامل