Journal Article

A search for optical bursts from the rotating radio transient J1819−1458 with ULTRACAM – II. Simultaneous ULTRACAM–Lovell Telescope observations

V. S. Dhillon, E. F. Keane, T. R. Marsh, B. W. Stappers, C. M. Copperwheat, R. D. G. Hickman, C. A. Jordan, P. Kerry, M. Kramer, S. P. Littlefair, A. G. Lyne, R. P. Mignani and A. Shearer

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 414, issue 4, pages 3627-3632
Published in print July 2011 | ISSN: 0035-8711
Published online July 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.18663.x
A search for optical bursts from the rotating radio transient J1819−1458 with ULTRACAM – II. Simultaneous ULTRACAM–Lovell Telescope observations

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The rotating radio transient (RRAT) J1819−1458 exhibits ∼3 ms bursts in the radio every ∼3 min, implying that it is visible for only ∼1 s per day. Assuming that the optical light behaves in a similar manner, long exposures of the field would be relatively insensitive due to the accumulation of sky photons. A much better way of detecting optical emission from J1819−1458 would then be to observe with a high-speed optical camera simultaneously with radio observations, and co-add only those optical frames coincident with the dispersion-corrected radio bursts. We present the results of such a search, using simultaneous ULTRACAM and Lovell Telescope observations. We find no evidence for optical bursts in J1819−1458 at magnitudes brighter than i′= 19.3 (5σ limit). This is nearly 3 mag fainter than the previous burst limit, which had no simultaneous radio observations.

Keywords: stars: neutron; pulsars: individual: J1819−1458

Journal Article.  4237 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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