ARAN - Access to Research at NUI Galway

Optical pulsations from the anomalous X-ray pulsar 1E 1048.1-5937

ARAN - Access to Research at NUI Galway

Show simple item record

dc.contributor.author Shearer, Andrew en
dc.date.accessioned 2011-03-10T17:00:53Z en
dc.date.available 2011-03-10T17:00:53Z en
dc.date.issued 2009 en
dc.identifier.citation V. S. Dhillon, T. R. Marsh, S. P. Littlefair, C. M. Copperwheat, P. Kerry, R. ...(2009)Optical pulsations from the anomalous X-ray pulsar 1E 1048.1-5937, en
dc.identifier.uri http://hdl.handle.net/10379/1740 en
dc.description.abstract We present high-speed optical photometry of the anomalous X-ray pulsar 1E 1048.1-5937 obtained with ULTRACAM on the 8.2-m Very Large Telescope in June 2007. We detect 1E 1048.1-5937 at a magnitude of i'=25.3+/-0.2, consistent with the values found by Wang et al. (2008) and hence confirming their conclusion that the source was approximately 1 mag brighter than in 2003-2006 due to an on-going X-ray flare that started in March 2007. The increased source brightness enabled us to detect optical pulsations with an identical period (6.458 s) to the X-ray pulsations. The rms pulsed fraction in our data is 21+/-7%, approximately the same as the 2-10 keV X-ray rms pulsed fraction. The optical and X-ray pulse profiles show similar morphologies and appear to be approximately in phase with each other, the latter lagging the former by only 0.06+/-0.02 cycles. The optical pulsations in 1E 1048.1-5937 are very similar in nature to those observed in 4U 0142+61. The implications of our observations for models of anomalous X-ray pulsars are discussed. en
dc.format application/pdf en
dc.language.iso en en
dc.subject Astrophysics - High Energy Astrophysical Phenomena en
dc.title Optical pulsations from the anomalous X-ray pulsar 1E 1048.1-5937 en
dc.type Article en
dc.local.publishedsource http://arxiv.org/pdf/0901.1559 en
dc.description.peer-reviewed peer-reviewed en
dc.local.authors V. S. Dhillon, T. R. Marsh, S. P. Littlefair, C. M. Copperwheat, P. Kerry, R. Dib, M. Durant, V. M. Kaspi, R. P. Mignani, A. Shearer en
dc.local.arxivid 0901.1559 en

Files in this item

Full Text

This item appears in the following Collection(s)

Show simple item record

Search ARAN


Advanced Search

Browse

My Account

Statistics