A 2.14 ms candidate optical pulsar in SN1987A: Ten years after

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We have monitored Supernova 1987A in optical/near-infrared bands from a few weeks following its birth until the present time in order to search for a pulsar remnant. We have found an apparent pattern of emission near the frequency of 467.5 Hz - a 2.14 ms pulsar candidate, first detected in data taken on the remnant at the Las Campanas Observatory (LCO) 2.5-m Dupont telescope during 14-16 Feb. 1992 UT. We detected further signals near the 2.14 ms period on numerous occasions over the next four years in data taken with a variety of telescopes, data systems and detectors, at a ... continued below

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6 p.

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Middleditch, J.; Kristian, J.A.; Kunkel, W.E.; Hill, K.M. & Watson, R.D. September 1, 1997.

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We have monitored Supernova 1987A in optical/near-infrared bands from a few weeks following its birth until the present time in order to search for a pulsar remnant. We have found an apparent pattern of emission near the frequency of 467.5 Hz - a 2.14 ms pulsar candidate, first detected in data taken on the remnant at the Las Campanas Observatory (LCO) 2.5-m Dupont telescope during 14-16 Feb. 1992 UT. We detected further signals near the 2.14 ms period on numerous occasions over the next four years in data taken with a variety of telescopes, data systems and detectors, at a number of ground- and space-based observatories. The sequence of detections of this signal from Feb. `92 through August `93, prior to its apparent subsequent fading, is highly improbable (< 10{sup -10} for any noise source). We also find evidence for modulation of the 2.14 ms period with a {approx}1,000 s period which, when taken with the high spindown of the source (2-3 x 10{sup -10} Hz/s), is consistent with precession and spindown via gravitational radiation of a neutron star with a non- axisymmetric oblateness of {approx}10{sup -6}, and an implied gravitational luminosity exceeding that of the Crab Nebula pulsar by an order of magnitude.

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6 p.

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OSTI as DE97008307

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  • AN1987A: ten years after conference, Serena (Chile), 23-28 Feb 1997

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  • Other: DE97008307
  • Report No.: LA-UR--97-1603
  • Report No.: CONF-970286--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 522269
  • Archival Resource Key: ark:/67531/metadc690450

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  • September 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 25, 2016, 1 p.m.

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Middleditch, J.; Kristian, J.A.; Kunkel, W.E.; Hill, K.M. & Watson, R.D. A 2.14 ms candidate optical pulsar in SN1987A: Ten years after, article, September 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc690450/: accessed January 23, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.