Optical observations of the field around the X-ray pulsars XTE J1858+034 and GRO J2058+42

Astronomy and Astrophysics – Astronomy

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Optical, Binaries, Pulsars, Transients

Scientific paper

We report photometric and spectroscopic optical observations of the likely optical counterparts to the 221-s XTE J1858+034 (Remillard & Levine and Takeshima & Corbet, 1998, IAUCirc 6826) and the 196-s high-mass X-ray binary (HMXB) pulsars GRO J2058+42 (Wilson et al. 1996, IAUCirc 6514, Wilson et al. 1998, ApJ, 499, 820). Optical photometric observations of the field around the best-fit ISGRI/IBIS INTEGRAL position R.A.=18h58m43s, Decl.=03d26m06s (Molkov et al, 2004, ATel 274) of XTE J1858+034 using Johnson BVR and a H alpha filter were carried out on the night 20 May 2004 (JD 2,453,146.45) with the 1.3-m telescope of the Skinakas Observatory (Crete, Greece).

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