Search for γ-ray emission from superluminous supernovae with the Fermi-LAT
Abstract
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- March 2018
- DOI:
- 10.1051/0004-6361/201730741
- arXiv:
- arXiv:1708.08971
- Bibcode:
- 2018A&A...611A..45R
- Keywords:
-
- gamma rays: general;
- supernovae: general;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 12 pages, 6 figures, 7 tables, accepted by A&