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Discovery and Orbital Determination of the Transient X-ray Pulsar GRO J1750-27

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.

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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
Related URLs:
URLURL TypeDescription
Prince, Thomas A.0000-0002-8850-3627
Chakrabarty, Deepto0000-0001-8804-8946
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.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
NASANAG 5-1458
NASANAG 5-1458
NASA Compton FellowshipNAG 5-3109
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1997-32
Issue or Number:2
Record Number:CaltechAUTHORS:20141117-094031229
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51826
Deposited By: Deborah Miles
Deposited On:19 Nov 2014 20:12
Last Modified:09 Mar 2020 13:18

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