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Abstract:

We present JK′ infrared images of the X-ray transient KS 1731-260, obtained in 1997 and in 1998 with IRAC2b at the ESO/MPI 2.2-m telescope at La Silla. Using as a reference the recent Chandra position, we confirm the identification of the X-ray source with the previously proposed counterpart (Wijnands et al. 2001b), for which we measure J = 17.32 ± 0.2 and K′ = 16.36 ± 0.18. The source was entering a low X-ray state at the epoch of our observations, and the accretion disk was still dominating the infrared flux. Indeed, when compared with the only published magnitudes in the J-band (Orosz et al. 2001), obtained with the source in quiescence, our photometry confirms the fading of the counterpart during the decay of the RXTE/ASM lightcurve.

Registro:

Documento: Artículo
Título:The infrared counterpart of the X-ray burster KS 1731-260
Autor:Mignani, R.P.; Chaty, S.; Mirabel, I.F.; Mereghetti, S.
Filiación:ESO, Karl Schwarzschild Str. 2, 85748 Garching bei München, Germany
Open University, Department of Physics and Astronomy, Walton Hall, Milton Keynes, MK7 6AA, United Kingdom
Service d'Astrophysique, CEA, CE-Saclay, 91191 Gif-sur-Yvette, France
Instituto de Astronomía y Física del Espacio, CONICET, cc5, 1428 Bs As, Argentina
Istituto di Astrofisica Spaziale e Fisica Cosmica CNR, Sezione di Milano G.Occhialini, via Bassini 15, 20133 Milano, Italy
Palabras clave:KS 1731-260; X-ray binaries; Image analysis; Infrared imaging; Infrared radiation; Optical telescopes; Photometry; X rays; X-ray bursters; Astrophysics
Año:2002
Volumen:389
Número:1
Página de inicio:L11
Página de fin:L14
DOI: http://dx.doi.org/10.1051/0004-6361:20020650
Título revista:Astronomy and Astrophysics
Título revista abreviado:Astron. Astrophys.
ISSN:00046361
CODEN:AAEJA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v389_n1_pL11_Mignani

Referencias:

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Citas:

---------- APA ----------
Mignani, R.P., Chaty, S., Mirabel, I.F. & Mereghetti, S. (2002) . The infrared counterpart of the X-ray burster KS 1731-260. Astronomy and Astrophysics, 389(1), L11-L14.
http://dx.doi.org/10.1051/0004-6361:20020650
---------- CHICAGO ----------
Mignani, R.P., Chaty, S., Mirabel, I.F., Mereghetti, S. "The infrared counterpart of the X-ray burster KS 1731-260" . Astronomy and Astrophysics 389, no. 1 (2002) : L11-L14.
http://dx.doi.org/10.1051/0004-6361:20020650
---------- MLA ----------
Mignani, R.P., Chaty, S., Mirabel, I.F., Mereghetti, S. "The infrared counterpart of the X-ray burster KS 1731-260" . Astronomy and Astrophysics, vol. 389, no. 1, 2002, pp. L11-L14.
http://dx.doi.org/10.1051/0004-6361:20020650
---------- VANCOUVER ----------
Mignani, R.P., Chaty, S., Mirabel, I.F., Mereghetti, S. The infrared counterpart of the X-ray burster KS 1731-260. Astron. Astrophys. 2002;389(1):L11-L14.
http://dx.doi.org/10.1051/0004-6361:20020650