Swift observations of the March 2011 outburst of the cataclysmic variable NSV 1436: A probable dwarf nova

J. P. Osborne; K. L. Page; A. A. Henden; J. U. Ness; M. F. Bode; G. J. Schwarz; Sumner Starrfield; J. J. Drake; E. Kuulkers; A. P. Beardmore

doi:10.1051/0004-6361/201117088

Swift observations of the March 2011 outburst of the cataclysmic variable NSV 1436: A probable dwarf nova

J. P. Osborne, K. L. Page, A. A. Henden, J. U. Ness, M. F. Bode, G. J. Schwarz, Sumner Starrfield, J. J. Drake, E. Kuulkers, A. P. Beardmore

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1 Scopus citations

Abstract

Aims. The March 2011 outburst of the poorly-studied cataclysmic variable NSV 1436 offered an opportunity to decide between dwarf nova and recurrent nova classifications. Methods. We use seven daily observations in the X-ray and UV by the Swift satellite, together with AAVSO V photometry, to characterise the outburst and decline behaviour. Results. The short optical outburst coincided with a faint and relatively soft X-ray state, whereas in decline to fainter optical magnitudes the X-ray source was harder and brighter. These attributes, and the modest optical outburst amplitude, indicate that this was a dwarf nova outburst and not a recurrent nova. The rapid optical fading suggests an orbital period below 2 h.

Original language	English (US)
Article number	A41
Journal	Astronomy and Astrophysics
Volume	533
DOIs	https://doi.org/10.1051/0004-6361/201117088
State	Published - 2011

Keywords

Accretion, accretion disks
Binaries: general
Novae, cataclysmic variables
Stars: dwarf novae
Stars: individual: NSV 1436

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1051/0004-6361/201117088

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title = "Swift observations of the March 2011 outburst of the cataclysmic variable NSV 1436: A probable dwarf nova",

abstract = "Aims. The March 2011 outburst of the poorly-studied cataclysmic variable NSV 1436 offered an opportunity to decide between dwarf nova and recurrent nova classifications. Methods. We use seven daily observations in the X-ray and UV by the Swift satellite, together with AAVSO V photometry, to characterise the outburst and decline behaviour. Results. The short optical outburst coincided with a faint and relatively soft X-ray state, whereas in decline to fainter optical magnitudes the X-ray source was harder and brighter. These attributes, and the modest optical outburst amplitude, indicate that this was a dwarf nova outburst and not a recurrent nova. The rapid optical fading suggests an orbital period below 2 h.",

keywords = "Accretion, accretion disks, Binaries: general, Novae, cataclysmic variables, Stars: dwarf novae, Stars: individual: NSV 1436",

author = "Osborne, {J. P.} and Page, {K. L.} and Henden, {A. A.} and Ness, {J. U.} and Bode, {M. F.} and Schwarz, {G. J.} and Sumner Starrfield and Drake, {J. J.} and E. Kuulkers and Beardmore, {A. P.}",

note = "Funding Information: We thank the Swift operations team and PI for their support of these observations. J.P.O., K.L.P. and A.P.B. acknowledge financial support from the UK Space Agency. S.S. is grateful to the NSF and to NASA for partial ",

year = "2011",

doi = "10.1051/0004-6361/201117088",

language = "English (US)",

volume = "533",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

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TY - JOUR

T1 - Swift observations of the March 2011 outburst of the cataclysmic variable NSV 1436

T2 - A probable dwarf nova

AU - Osborne, J. P.

AU - Page, K. L.

AU - Henden, A. A.

AU - Ness, J. U.

AU - Bode, M. F.

AU - Schwarz, G. J.

AU - Starrfield, Sumner

AU - Drake, J. J.

AU - Kuulkers, E.

AU - Beardmore, A. P.

N1 - Funding Information: We thank the Swift operations team and PI for their support of these observations. J.P.O., K.L.P. and A.P.B. acknowledge financial support from the UK Space Agency. S.S. is grateful to the NSF and to NASA for partial

PY - 2011

Y1 - 2011

N2 - Aims. The March 2011 outburst of the poorly-studied cataclysmic variable NSV 1436 offered an opportunity to decide between dwarf nova and recurrent nova classifications. Methods. We use seven daily observations in the X-ray and UV by the Swift satellite, together with AAVSO V photometry, to characterise the outburst and decline behaviour. Results. The short optical outburst coincided with a faint and relatively soft X-ray state, whereas in decline to fainter optical magnitudes the X-ray source was harder and brighter. These attributes, and the modest optical outburst amplitude, indicate that this was a dwarf nova outburst and not a recurrent nova. The rapid optical fading suggests an orbital period below 2 h.

AB - Aims. The March 2011 outburst of the poorly-studied cataclysmic variable NSV 1436 offered an opportunity to decide between dwarf nova and recurrent nova classifications. Methods. We use seven daily observations in the X-ray and UV by the Swift satellite, together with AAVSO V photometry, to characterise the outburst and decline behaviour. Results. The short optical outburst coincided with a faint and relatively soft X-ray state, whereas in decline to fainter optical magnitudes the X-ray source was harder and brighter. These attributes, and the modest optical outburst amplitude, indicate that this was a dwarf nova outburst and not a recurrent nova. The rapid optical fading suggests an orbital period below 2 h.

KW - Accretion, accretion disks

KW - Binaries: general

KW - Novae, cataclysmic variables

KW - Stars: dwarf novae

KW - Stars: individual: NSV 1436

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Swift observations of the March 2011 outburst of the cataclysmic variable NSV 1436: A probable dwarf nova

Abstract

Keywords

ASJC Scopus subject areas

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