Chakrabarty, Deepto and Bildsten, Lars and Chiu, John and Grunsfeld, John M. and Koh, Towsian and Prince, Thomas A. and Finger, Mark H. and Wilson, Robert B.
(1994)
Long-Term Monitoring of the Accreting Pulsar GX 1+4.
In:
The Second Compton Symposium.
AIP Conference Series.
Vol.304.
No.304.
American Institute of Physics
, New York, NY, pp. 285-289.
ISBN 1-56396-261-6.
https://resolver.caltech.edu/CaltechAUTHORS:20140520-094539152
![[img]](https://authors.library.caltech.edu/45839/1.hassmallThumbnailVersion/1993-34.pdf)  Preview |
|
PDF
- Submitted Version
See Usage Policy.
840Kb |
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20140520-094539152
Abstract
We present preliminary results from two years of GRO/BATSE hard X‐ray (20–100 keV) monitoring of the ∼120 s accretion‐powered pulsar GX 1+4. Daily pulse frequency measurements from 1991 April to 1993 September show an average spin‐down of ḟ≊−5×10^(−12) s^(−2), with increases in the spin‐down rate during high‐luminosity intervals. The 20–100 keV pulsed flux spectrum for the interval TJD 8393–8406 is fit by a power‐law index of 2.56±0.04. Optical spectroscopy of the suggested red giant companion V2116 Oph taken during the 1993 September X‐ray outburst from GX 1+4 show considerably strengthened emission line features, supporting the association.
| Item Type: | Book Section |
|---|
| Related URLs: | |
|---|
| ORCID: | |
|---|
| Additional Information: | © 1994 American Institute of Physics.
Published online 20 June 1994.
We acknowledge the significant contributions to this work by the entire BATSE instrument team
at NASA/MSFC. We also thank F. K. Lamb for useful comments. This work is supported in part by
NASA grants NAGW-1919, NAGW-2920, and NAG 5-1458, as well as a Lee A. DuBridge fellowship
to L.B. funded by the Weingart Foundation. |
|---|
| Group: | Space Radiation Laboratory |
|---|
| Funders: | | Funding Agency | Grant Number |
|---|
| NASA | NAGW-1919 | | NASA | NAGW-2920 | | NASA | NAG 5-1458 | | Lee A. DuBridge Fellowship | UNSPECIFIED | | Weingart Foundation | UNSPECIFIED |
|
|---|
| Other Numbering System: | | Other Numbering System Name | Other Numbering System ID |
|---|
| Space Radiation Laboratory | 1993-34 |
|
|---|
| Series Name: | AIP Conference Series |
|---|
| Issue or Number: | 304 |
|---|
| Record Number: | CaltechAUTHORS:20140520-094539152 |
|---|
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140520-094539152 |
|---|
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
|---|
| ID Code: | 45839 |
|---|
| Collection: | CaltechAUTHORS |
|---|
| Deposited By: |
Deborah Miles
|
|---|
| Deposited On: | 01 Jun 2014 15:39 |
|---|
| Last Modified: | 09 Mar 2020 13:18 |
|---|
Repository Staff Only: item control page
