HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

GMRT discovery of PSR J1544+4937, an eclipsing black-widow pulsar identified with a Fermi LAT source

Abstract : Using the Giant Metrewave Radio Telescope (GMRT) we performed deep observations to search for radio pulsations in the directions of unidentified Fermi Large Area Telescope (LAT) gamma-ray sources. We report the discovery of an eclipsing black-widow millisecond pulsar, PSR J1544+4937, identified with the un-cataloged gamma-ray source Fermi J1544.2+4941. This 2.16 ms pulsar is in a 2.9 hours compact circular orbit with a very low-mass companion (Mc > 0.017 Msun). At 322 MHz this pulsar is found to be eclipsing for 13% of its orbit, whereas at 607 MHz the pulsar is detected throughout the low-frequency eclipse phase. Variations in the eclipse ingress phase are observed, indicating a clumpy and variable eclipsing medium. Moreover, additional short-duration absorption events are observed around the eclipse boundaries. Using the radio timing ephemeris we were able to detect gamma-ray pulsations from this pulsar, confirming it as the source powering the gamma-ray emission.
Document type :
Journal articles
Complete list of metadata

Cited literature [12 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-01261369
Contributor : Nathalie Rouchon Connect in order to contact the contributor
Submitted on : Friday, June 24, 2016 - 2:31:56 PM
Last modification on : Wednesday, May 11, 2022 - 12:44:01 PM
Long-term archiving on: : Sunday, September 25, 2016 - 11:21:55 AM

File

apjl_773_1_12.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

B. Bhattacharyya, J. Roy, P. S. Ray, Y. Gupta, R. W. Romani, et al.. GMRT discovery of PSR J1544+4937, an eclipsing black-widow pulsar identified with a Fermi LAT source. The Astrophysical journal letters, Bristol : IOP Publishing, 2013, 773 (1), 6 pp. ⟨10.1088/2041-8205/773/1/L12⟩. ⟨insu-01261369⟩

Share

Metrics

Record views

303

Files downloads

97