Scott, D. M. and Finger, Mark H. and Wilson, Robert B. and Koh, Danny T. and Prince, Thomas A. and Vaughan, Brian A. and Chakrabarty, Deepto
(1997)
Discovery and Orbital Determination of the Transient X-ray Pulsar GRO J1750-27.
Astrophysical Journal, 488
(2).
pp. 831-835.
ISSN 0004-637X.
https://resolver.caltech.edu/CaltechAUTHORS:20141117-094031229
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Abstract
We report on the discovery and hard X-ray (20-70 keV) observations of the 4.45 s period transient X-ray pulsar GRO J1750-27 with the BATSE all-sky monitor on board CGRO. A relatively faint outburst (<30 mcrab peak) lasting at least 60 days was observed during which the spin-up rate peaked at
38 pHz s^(-1) and was correlated with the pulsed intensity. An orbit with a period of 29.8 days was found. The large spin-up rate, spin period, and orbital period together suggest that accretion is occurring from a disk and that the outburst is a "giant" outburst typical of a Be/X-ray transient system. No optical counterpart has yet been reported.
| Item Type: | Article |
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| Additional Information: | © 1997 American Astronomical Society.
This work was supported in part by the National Aeronautics
and Space Administration (NASA) under grants
NAG 5-3293 and NAG 5-1458. D. C. was supported by a
NASA Compton GRO Postdoctoral Fellowship under
grant NAG 5-3109. We also thank the anonymous referee
for useful comments. |
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| Group: | Space Radiation Laboratory |
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| Funders: | | Funding Agency | Grant Number |
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| NASA | NAG 5-1458 | | NASA | NAG 5-1458 | | NASA Compton Fellowship | NAG 5-3109 |
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| Other Numbering System: | | Other Numbering System Name | Other Numbering System ID |
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| Space Radiation Laboratory | 1997-32 |
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| Issue or Number: | 2 |
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| Record Number: | CaltechAUTHORS:20141117-094031229 |
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| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20141117-094031229 |
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| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
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| ID Code: | 51826 |
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| Collection: | CaltechAUTHORS |
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| Deposited By: |
Deborah Miles
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| Deposited On: | 19 Nov 2014 20:12 |
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| Last Modified: | 09 Mar 2020 13:18 |
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