@inproceedings{f355ec247a8f4529b15693d179c005d0,
title = "XRF 060428B: Observational evidence for a strongly lensed burst",
abstract = "Long-duration GRBs and X-ray flashes (XRFs; softer-spectrum brethren of long GRBs) are thought to occur following the core-collapse of massive stars. We report here on observations of a recent X-ray flash (XRF 060428B) that occurred 2.6 ″ in projection from the center of a massive red galaxy at redshift z=0.348, well within its detectable light. While initial probabilistic arguments suggested a physical connection, deep Keck imaging reveals a compact blue source at the burst position, likely a higher-redshift host galaxy. Since the observed offset is approximately equal to the Einstein radius of the foreground elliptical, we suggest that XRF 060428B may have been strongly gravitationally lensed, allowing us to detect an underluminous burst at high-z. This would naturally explain the otherwise coincidental proximity to a nearby galaxy.",
keywords = "Gamma rays: bursts, Gamma-ray bursts: individual: 060428B, Gravitational lensing",
author = "Perley, {D. A.} and Bloom, {J. S.} and Butler, {N. R.} and W. Li and Chen, {H. W.}",
note = "Funding Information: We thank the China National Petroleum Company for permission to release the seismic data. We also thank three reviewers and the editor for their thorough reviews and constructive comments. This study was financially supported by the National Natural Science Foundation of China (41406050 and 41676041), the National 863 Program (2013AA092601), and Research Award Fund for Outstanding Young and Middle-aged Scientists of Shan-dong Province (BS2014HZ001).; SUPERNOVA 1987A: 20 YEARS AFTER: Supernovae and Gamma-Ray Bursters ; Conference date: 19-02-2007 Through 23-02-2007",
year = "2007",
doi = "10.1063/1.2803619",
language = "English (US)",
isbn = "0735404488",
series = "AIP Conference Proceedings",
pages = "526--529",
booktitle = "SUPERNOVA 1987A",
}