Ramsay, G. (Gavin), Hakala, P., Barclay, Thomas, Wheatley, P. J., Marshall, George, Lehto, Harry, Napiwotzki, Ralf, Nelemans, G., Potter, Stephen and Todd, Ian. (2009) RAT J1953+1859: a dwarf nova discovered through high amplitude QPOs in quiescence. Monthly Notices of the Royal Astronomical Society, 398 (3). pp. 1333-1338. ISSN 0035-8711

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Abstract

We report the discovery of an accreting binary, RAT J1953+1859, made during the RApid Temporal Survey (RATS) on the Isaac Newton Telescope. It showed high amplitude (0.3 mag) quasi-periodic oscillations on a time-scale of similar to 20 min. Further observations made using the Nordic Optical Telescope showed it to be similar to 4 mag brighter than in the discovery images. These photometric observations, together with radial velocity data taken using the William Herschel Telescope, point to an orbital period of similar to 90 min. These data suggest that RAT J1953+1859 is a dwarf novae of the SU UMa type. What makes RAT J1953+1859 unusual is that it is the first such system to be discovered as a result of high amplitude QPOs during quiescence. This suggests that high-cadence wide-field surveys could be another means to discover cataclysmic variables as a result of their short period variability.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Monthly Notices of the Royal Astronomical Society
Publisher:	Wiley
ISSN:	0035-8711
Official Date:	21 September 2009
Volume:	398
Number:	3
Number of Pages:	6
Page Range:	pp. 1333-1338
Identification Number:	10.1111/j.1365-2966.2009.14982.x
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/17321

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