Volume 611, March 2018
|Number of page(s)||11|
|Published online||22 March 2018|
Search for γ-ray emission from superluminous supernovae with the Fermi-LAT
Sorbonne Universités, UPMC Univ. Paris 6 et CNRS, UMR 7095, Institut d’Astrophysique de Paris,
98bis bd Arago,
e-mail: email@example.com, firstname.lastname@example.org
2 Laboratoire AIM-Paris-Saclay, CEA/DSM/IRFU, CNRS, Université Paris Diderot, 91191 Gif-sur-Yvette, France
3 Astronomy Department, University of Geneva, Ch. d’Ecogia 16, 1290 Versoix, Switzerland
4 GRAPPA Institute, University of Amsterdam, 1098 XH Amsterdam, The Netherlands
Accepted: 25 August 2017
We present the first individual and stacking systematic search for γ-ray emission in the GeV band in the directions of 45 superluminous supernovae (SLSNe) with the Fermi Large Area Telescope (LAT). No excess of γ-rays from the SLSN positions was found. We report γ-ray luminosity upper limits and discuss the implication of these results on the origin of SLSNe and, in particular, the scenario of central compact object-aided SNe. From the stacking search, we derived an upper limit at 95% confidence level to the γ-ray luminosity (above 600 MeV) Lγ < 9.1 × 1041 erg s−1 for an assumed E−2 photon spectrum for our full SLSN sample. We conclude that the rate of the neutron stars born with millisecond rotation periods P ≲ 2 ms and B ~ 1012−13 G must be lower than the rate of the observed SLSNe. The luminosity limits obtained on individual sources are also constraining: in particular, SN2013fc, CSS140222, SN2010kd, and PTF12dam can only be born with millisecond periods if B ≲ 1013 G.
Key words: gamma rays: general / supernovae: general
© ESO 2018
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