English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We present the results of 71.6 hours of observations of the Geminga pulsar(PSR J0633+1746) with the VERITAS very-high-energy gamma-ray telescope array.Data taken with VERITAS between November 2007 and February 2013 werephase-folded using a Geminga pulsar timing solution derived from data recordedby the XMM-\emph{Newton} and \emph{Fermi}-LAT space telescopes. No significantpulsed emission above 100 GeV is observed, and we report upper limits at the95% confidence level on the integral flux above 135 GeV (spectral analysisthreshold) of 4.0$\times10^{-13}$ s$^{-1}$ cm$^{-2}$ and 1.7$\times10^{-13}$s$^{-1}$ cm$^{-2}$ for the two principal peaks in the emission profile. Theseupper limits, placed in context with phase-resolved spectral energydistributions determined from five years of data from the \emph{Fermi}-LAT,constrain possible hardening of the Geminga pulsar emission spectra above$\sim$50 GeV.

A Search for Pulsations from Geminga Above 100 GeV with VERITAS