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A search for an optical counterpart to the gravitational-wave event GW151226

Smartt, S. J.; Chambers, K. C.; Smith, K. W.; Huber, M. E.; Young, D. R.; Chen, T.-W.; Inserra, C.; Wright, D. E.; Coughlin, M.; Denneau, L.; Flewelling, H.; Heinze, A.; Jerkstrand, A.; Magnier, E. A.; Maguire, K.; Mueller, B.; Rest, A.; Sherstyuk, A.; Stalder, B.; Schultz, A. S. B.; Stubbs, C. W.; Tonry, J.; Waters, C.; Wainscoat, R. J.; Valle, M. Della; Dennefeld, M.; Dimitriadis, G.; Firth, R. E.; Fraser, M.; Frohmaier, C.; Gal-Yam, A.; Harmanen, J.; Kankare, E.; Kotak, R.; Kromer, M.; Mandel, I.; Sollerman, J.; Gibson, B.; Primak, N.; Willman, M.

Authors

S. J. Smartt

K. C. Chambers

K. W. Smith

M. E. Huber

D. R. Young

T.-W. Chen

C. Inserra

D. E. Wright

M. Coughlin

L. Denneau

H. Flewelling

A. Heinze

A. Jerkstrand

E. A. Magnier

K. Maguire

B. Mueller

A. Rest

A. Sherstyuk

B. Stalder

A. S. B. Schultz

C. W. Stubbs

J. Tonry

C. Waters

R. J. Wainscoat

M. Della Valle

M. Dennefeld

G. Dimitriadis

R. E. Firth

M. Fraser

C. Frohmaier

A. Gal-Yam

J. Harmanen

E. Kankare

R. Kotak

M. Kromer

I. Mandel

J. Sollerman

N. Primak

M. Willman



Abstract

� 2016. The American Astronomical Society. All rights reserved.. We present a search for an electromagnetic counterpart of the gravitational-wave source GW151226. Using the Pan-STARRS1 telescope we mapped out 290 square degrees in the optical iP1filter, starting 11.5 hr after the LIGO information release and lasting for an additional 28 days. The first observations started 49.5 hr after the time of the GW151226 detection. We typically reached sensitivity limits of iP1= 20.3-20.8 and covered 26.5% of the LIGO probability skymap. We supplemented this with ATLAS survey data, reaching 31% of the probability region to shallower depths of m ≃ 19. We found 49 extragalactic transients (that are not obviously active galactic nuclei), including a faint transient in a galaxy at 7 Mpc (a luminous blue variable outburst) plus a rapidly decaying M-dwarf flare. Spectral classification of 20 other transient events showed them all to be supernovae. We found an unusual transient, PS15dpn, with an explosion date temporally coincident with GW151226, that evolved into a type Ibn supernova. The redshift of the transient is secure at z = 0.1747 0.0001 and we find it unlikely to be linked, since the luminosity distance has a negligible probability of being consistent with that of GW151226. In the 290 square degrees surveyed we therefore do not find a likely counterpart. However we show that our survey strategy would be sensitive to NS-NS mergers producing kilonovae at DL≲ 100 Mpc, which is promising for future LIGO/Virgo searches.

Journal Article Type Article
Publication Date Aug 20, 2016
Journal Astrophysical Journal Letters
Print ISSN 2041-8205
Electronic ISSN 2041-8213
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 827
Issue 2
Article Number L40
Pages L40
APA6 Citation Smartt, S. J., Chambers, K. C., Smith, K. W., Huber, M. E., Young, D. R., Chen, T., …Willman, M. (2016). A search for an optical counterpart to the gravitational-wave event GW151226. Astrophysical journal. Letters, 827(2), L40. https://doi.org/10.3847/2041-8205/827/2/l40
DOI https://doi.org/10.3847/2041-8205/827/2/l40
Keywords Gravitational waves; Supernovae: general; Surveys
Publisher URL http://iopscience.iop.org/article/10.3847/2041-8205/827/2/L40
Related Public URLs https://pure.qub.ac.uk/portal/files/131378809/Smartt_2016_ApJL_827_L40.pdf
Copyright Statement © 2016 The American Astronomical Society.

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Copyright Statement
© 2016 The American Astronomical Society.



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