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Search for Optical Pulsation in M82 X-2

Collura, G. and Strader, P. and Meeker, S. R. and Szypryt, P. and Walter, A. B. and Bockstiegel, C. and Mazin, B. A. and Prince, T. A. (2017) Search for Optical Pulsation in M82 X-2. Astrophysical Journal, 850 (1). Art. No. 65. ISSN 1538-4357. doi:10.3847/1538-4357/aa93d8.

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We report on a search for optical pulsation from M82 X-2 over a range of periods. M82 X-2 is an X-ray pulsar with a 1.37s average spin period and a 2.5 day sinusoidal modulation. The observations were done with the ARray Camera for Optical to Near-IR Spectrophotometry at the 200 inch Hale telescope at the Palomar Observatory. We performed H test and χ^2 statistical analysis. No significant optical pulsations were found in the wavelength range of 3000–11000 Å with a pulsation period between 1.36262 and 1.37462 s. We found an upper limit on pulsed emission in the 4000–8000 Å wavelength range to be fainter than ~20.5 mag_(AB) , corresponding to ~23 μJy.

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Prince, T. A.0000-0002-8850-3627
Additional Information:© 2017 The American Astronomical Society. Received 2017 July 25; revised 2017 October 10; accepted 2017 October 13; published 2017 November 17. This material is based upon work supported by the National Science Foundation under grant No. AST-1411613. Observations were made using the Palomar 200 inch Hale Telescope of the Caltech Optical Observatories. We are pleased to acknowledge the Palomar Observatory staff for their enthusiastic and excellent support.
Group:Astronomy Department
Funding AgencyGrant Number
Subject Keywords:pulsars: general – pulsars: individual (M82 X-2) – stars: neutron
Issue or Number:1
Record Number:CaltechAUTHORS:20171211-124441481
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Official Citation:G. Collura et al 2017 ApJ 850 65
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83803
Deposited By: Tony Diaz
Deposited On:12 Dec 2017 22:00
Last Modified:15 Nov 2021 20:14

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