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Title: A Search for Pulsations From Geminga Above 100 GeV With Veritas

Journal Article · · The Astrophysical Journal (Online)

Here, we present the results of 71.6 hr of observations of the Geminga pulsar (PSR J0633+1746) with the VERITAS very-high-energy gamma-ray telescope array. Data taken with VERITAS between 2007 November and 2013 February were phase-folded using a Geminga pulsar timing solution derived from data recorded by the XMM- Newton and Fermi-LAT space telescopes. No significant pulsed emission above 100 GeV is observed, and we report upper limits at the 95% confidence level on the integral flux above 135 GeV (spectral analysis threshold) of 4.0 × 10-13 s-1 cm-2 and 1.7 × 10-13 s-1 cm-2 for the two principal peaks in the emission profile. These upper limits, placed in context with phase-resolved spectral energy distributions determined from 5 yr of data from the Fermi-Large Area Telescope (LAT), constrain possible hardening of the Geminga pulsar emission spectra above ~50 GeV.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC); USDOE Office of Science (SC)
Contributing Organization:
VERITAS Collaboration
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1429847
Journal Information:
The Astrophysical Journal (Online), Vol. 800, Issue 1; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Cited By (5)

Search for VHE gamma-ray emission from Geminga pulsar and nebula with the MAGIC telescopes journal June 2016
First ground-based measurement of sub-20 GeV to 100 GeV γ -Rays from the Vela pulsar with H.E.S.S. II journal December 2018
Prospects for the detection of high-energy (E > 25 GeV) Fermi pulsars with the Cherenkov Telescope Array journal June 2017
Search for VHE gamma-ray emission from Geminga pulsar and nebula with the MAGIC telescopes text January 2016
First ground-based measurement of sub-20 GeV to 100 GeV $\gamma$-Rays from the Vela pulsar with H.E.S.S. II text January 2018


Figures / Tables (4)


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