A New Radio Detection of the Bursting Source GCRT J1745-3009

Abstract

GCRT J1745-3009 is a transient bursting radio source located in the direction of the Galactic center, discovered in 330 MHz VLA observations from 2002 September 30--October 1 by Hyman et al. We have searched for bursting activity from GCRT J1745-3009 in nearly all of the available 330 MHz VLA observations of the Galactic center since 1989 as well as in 2003 GMRT observations. We report a new radio detection of the source in 330 MHz GMRT data taken on 2003 September 28. A single ~0.5 Jy burst was detected, approximately 3x weaker than the five bursts detected in 2002. Due to the sparse sampling of the 2003 observation, only the decay portion of a single burst was detected. We present additional evidence indicating that this burst is an isolated one, but we cannot completely rule out additional undetected bursts that may have occured with the same ~77 min. periodicity observed in 2002 or with a different periodicity. Assuming the peak emission was detected, the decay time of the burst, ~2 min, is consistent with that determined for the 2002 bursts. Based on the total time for which we have observations, we estimate that the source has a duty cycle of roughly 10%.

arXiv comment16 pages including 4 figures. Submitted to The Astrophysical Journal

References in corpus (8)

• The Velocity Distribution of Isolated Radio Pulsars
• A powerful bursting radio source towards the Galactic Centre
• A $\lambda$20cm Survey of the Galactic Center Region I: Detection of Numerous Linear Filaments
• The Mouse That Soared: High Resolution X-ray Imaging of the Pulsar-Powered Bow Shock G359.23-0.82
• High-Resolution, Wide-Field Imaging of the Galactic Center Region at 330 MHz
• GCRT J1745-3009 as a Transient White Dwarf Pulsar
• Low-Frequency Radio Transients in the Galactic Center
• Is the Bursting Radio-source GCRT J1745-3009 a Double Neutron Star Binary ?

Cited by in corpus (16)

• RRATs: New Discoveries, Timing Solutions & Musings
• On the origins of part-time radio pulsars
• LOFAR MSSS: Detection of a low-frequency radio transient in 400 hrs of monitoring of the North Celestial Pole
• A survey for transients and variables with the Murchison Widefield Array 32-tile prototype at 154 MHz
• Exploring the Transient Radio Sky with VLITE: Early Results
• GCRT J1742-3001: A New Radio Transient Towards the Galactic Center
• New methods to constrain the radio transient rate: results from a survey of four fields with LOFAR
• A Faint, Steep Spectum Burst from the Radio Transient GCRT J1745-3009
• A Search for the Near-Infrared Counterpart to GCRT J1745-3009
• Circularly polarized emission from the transient bursting radio source GCRT J1745-3009
• ASGARD: A Large Survey for Slow Galactic Radio Transients. I. Overview and First Results
• A pilot ASKAP survey for radio transients towards the Galactic Centre
• Two Extreme Steep-Spectrum, Polarized Radio Sources Towards the Galactic Bulge
• Transient Events in Archival Very Large Array Observations of the Galactic Center
• A new perspective on GCRT J1745-3009
• Explosive and radio-selected Transients: Transient Astronomy with SKA and its Precursors