Radio images of the microquasar GRS 1758-258
نویسندگان
چکیده
منابع مشابه
The Infrared Counterpart of the Microquasar Grs 1758−258
We present revised infrared (2.2μm) astrometry of the field containing the Galactic microquasar GRS 1758−258, using observations at the Keck I 10-m telescope. We find three candidates for the microquasar within a 3σ error circle, but none within 2σ. We show that if the 18.4 day X-ray period of GRS 1758−258 is due to a binary orbit, then only one of the three candidates, an early K-type giant, i...
متن کاملXMM - Newton Spectroscopy of the Galactic Microquasar GRS 1758 − 258 in the Peculiar Off / Soft State
We report on an XMM-Newton Reflection Grating Spectrometer observation of the black hole candidate and Galactic microquasar GRS 1758−258. The source entered a peculiar “off/soft” state in late February, 2001, in which the spectrum softened while the X-ray flux – and the inferred mass accretion rate – steadily decreased. We find no clear evidence for emission or absorption lines in the dispersed...
متن کاملThe Spectrum and Accurate Location of GRS 1758 - 258
We observed the “micro-quasar” GRS 1758–258 four times with Chandra. Two HRC-I observations were made in 2000 SeptemberOctober spanning an intermediate-to-hard spectral transition (identified with RXTE ). Another HRC-I and an ACIS/HETGS observation were made in 2001 March following a hard-to-soft transition to a very low flux state. The accurate position (J2000) of the X-ray source is RA = 18 0...
متن کاملChandra High Resolution Camera Imaging of Grs 1758–258
We observed the " micro-quasar " GRS 1758–258 four times with Chandra. Two HRC-I observations were made in 2000 September-October spanning an intermediate-to-hard spectral transition (identified with RXTE). Another HRC-I and an ACIS/HETG observation were made in 2001 March following a hard-to-soft transition to a very low flux state. Based on the three HRC images and the HETG zero order image, ...
متن کاملGmrt Radio Observations of Microquasar Grs 1915+105
We have observed microquasar GRS 1915+105 at 1.28 GHz for 8 days from June 18 to July 1, 2001 using Giant Metrewave Radio Telescope (GMRT). We have seen several isolated radio baby flares of varying intensity and duration. We have also observed broad composite flares with rise and decay times of few hours on June 28-29, 2001 few days prior to when source went to the “plateau radio state” on 3rd...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2002
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20020273