Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2011-03-14
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
Accepted for publication in MNRAS; 9 pages, 8 figures, 2 tables
Scientific paper
We present an analysis of high energy (HE; 0.1-300 GeV) gamma-ray observations of 1FGL J1227.9-4852 with the Fermi Gamma-ray Space Telescope, follow-up radio observations with the Australia Telescope Compact Array, Giant Metrewave Radio Telescope and Parkes radio telescopes of the same field and follow-up optical observations with the ESO VLT. We also examine archival XMM-Newton and INTEGRAL X-ray observations of the region around this source. The gamma-ray spectrum of 1FGL J1227.9-4852 is best fit with an exponentially cutoff power-law, reminiscent of the population of pulsars observed by Fermi. A previously unknown, compact radio source within the 99.7% error circle of 1FGL J1227.9-4852 is discovered and has a morphology consistent either with an AGN core/jet structure or with two roughly symmetric lobes of a distant radio galaxy. A single bright X-ray source XSS J12270-4859, a low-mass X-ray binary, also lies within the 1FGL J1227.9-4852 error circle and we report the first detection of radio emission from this source. The potential association of 1FGL J1227.9-4852 with each of these counterparts is discussed. Based upon the available data we find the association of the gamma-ray source to the compact double radio source unlikely and suggest that XSS J12270-4859 is a more likely counterpart to the new HE source. We propose that XSS J12270-4859 may be a millisecond binary pulsar and draw comparisons with PSR J1023+0038.
Camilo Fernando
Corbel Sephane
Corbet Robin H. D.
Dubois René
Dubus Guillaume
No associations
LandOfFree
The bright unidentified gamma-ray source 1FGL J1227.9-4852: Can it be associated with an LMXB? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The bright unidentified gamma-ray source 1FGL J1227.9-4852: Can it be associated with an LMXB?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The bright unidentified gamma-ray source 1FGL J1227.9-4852: Can it be associated with an LMXB? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-259394