Change search
ReferencesLink to record
Permanent link

Direct link
A SEARCH FOR AN OPTICAL COUNTERPART TO THE GRAVITATIONAL-WAVE EVENT GW151226
Show others and affiliations
Number of Authors: 40
2016 (English)In: Astrophysical Journal Letters, ISSN 2041-8205, E-ISSN 2041-8213, Vol. 827, no 2, L40Article in journal (Refereed) Published
Abstract [en]

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 i(P1) filter, 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 i(P1) = 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 similar or equal to 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 D-L less than or similar to 100 Mpc, which is promising for future LIGO/Virgo searches.

Place, publisher, year, edition, pages
2016. Vol. 827, no 2, L40
Keyword [en]
gravitational waves, supernovae: general, surveys
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-135111DOI: 10.3847/2041-8205/827/2/L40ISI: 000383712100019OAI: oai:DiVA.org:su-135111DiVA: diva2:1046646
Available from: 2016-11-14 Created: 2016-10-31 Last updated: 2016-11-14Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Kromer, MarkusSollerman, Jesper
By organisation
Department of AstronomyThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
In the same journal
Astrophysical Journal Letters
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 5 hits
ReferencesLink to record
Permanent link

Direct link