GCRT J1745−3009 is a Galactic Center radio transient (GCRT), or bursting low-frequency radio source which lies in the direction of the Galactic Center.
Discovery
thumb|A radio image of the central region of the Milky Way galaxy. The arrow indicates the supernova remnant.<!--the same supernova remnant seen in the previous image. - previous image was deleted from lack of copyright, not sure if that was correct -->
A group of astronomers from Sweet Briar College and the Naval Research Laboratory detected transient emission from two sources in 1998 while studying the Galactic Center. They then began monitoring the region specifically looking for transient sources and detected five bursts of radio waves about 1 meter in wavelength (frequency 330 MHz) during a seven-hour period from September 30 to October 1, 2002.
The five bursts were of equal brightness, with each lasting about 10 minutes, and occurring every 77 minutes. Like an earlier low-frequency transient discovered by the same group, it was given the designation GCRT, an abbreviation for Galactic Center Radio Transient. The source was also nicknamed a burper. The group found no X-ray or γ-ray counterpart to the object. and a weaker burst was found in data recorded March 20, 2004. a radio-emitting white dwarf, and a pulsar precessing with a period of 77 minutes.
See also
- GLEAM-X J162759.5−523504.3
- Rotating radio transients