The Spectrum and Accurate Location of GRS 1758-258
| dc.creator | Heindl, W. A. | |
| dc.creator | Smith, D. M. | |
| dc.date | 2001-07-24 | |
| dc.date.accessioned | 2026-07-07T01:59:26Z | |
| dc.date.available | 2026-07-07T01:59:26Z | |
| dc.description | 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/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 01 12.40, Dec= -25 44 36.0 (90% confidence radius = 0".6), consistent with the purported variable radio counterpart. All images are consistent with GRS 1758-258 being a point source, indicating that any bright jet is less than ~1 light-month in projected length, assuming a distance of 8.5 kpc. The March spectrum is well-fit with a multi-color disk-blackbody with an inner temperature of 0.50+/-0.01 keV, interstellar absorption of nH = (1.59 +/- 0.05)x10^22 cm^-2, and (un-absorbed) 1-10 keV luminosity of (4.5x10^36)(D/8.5kpc)^2 ergs/sec. No narrow emission lines are apparent in the spectrum and upper limits to line equivalent widths are given. | |
| dc.description | 6 pages. To appear in "The High Energy Universe at Sharp Focus: Chandra Science", proceedings of the 113th Meeting of the Astronomical Society of the Pacific. 16-18 July 2001, St. Paul, MN | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0107469 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0107469 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/3110 | |
| dc.subject | Astrophysics | |
| dc.title | The Spectrum and Accurate Location of GRS 1758-258 | |
| dc.type | text |