A Search for Pulsations from Geminga Above 100 GeV with VERITAS

E. Aliu; S. Archambault; A. Archer; T. Aune; A. Barnacka; M. Beilicke; W. Benbow; R. Bird; J. H. Buckley; V. Bugaev; K. Byrum; J. V Cardenzana; M. Cerruti; X. Chen; L. Ciupik; M. P. Connolly; W. Cui; H. J. Dickinson; J. Dumm; J. D. Eisch; M. Errando; A. Falcone; Q. Feng; J. P. Finley; H. Fleischhack; P. Fortin; L. Fortson; A. Furniss; G. H. Gillanders; S. Griffin; S. T. Griffiths; J. Grube; G. Gyuk; N. Hakansson; D. Hanna; J. Holder; T. B. Humensky; C. A. Johnson; P. Kaaret; P. Kar; M. Kertzman; D. Kieda; F. Krennrich; S. Kumar; M. J. Lang; M. Lyutikov; A. S Madhavan; G. Maier; S. McArthur; A. McCann

doi:10.1088/0004-637X/800/1/61

A Search for Pulsations from Geminga Above 100 GeV with VERITAS

High Energy Astrophysical Phenomena 2015-06-23 v1

Authors: E. Aliu , S. Archambault , A. Archer , T. Aune , A. Barnacka , M. Beilicke , W. Benbow , R. Bird , J. H. Buckley , V. Bugaev , K. Byrum , J. V Cardenzana , M. Cerruti , X. Chen , L. Ciupik , M. P. Connolly , W. Cui , H. J. Dickinson , J. Dumm , J. D. Eisch , M. Errando , A. Falcone , Q. Feng , J. P. Finley , H. Fleischhack , P. Fortin , L. Fortson , A. Furniss , G. H. Gillanders , S. Griffin , S. T. Griffiths , J. Grube , G. Gyuk , N. Hakansson , D. Hanna , J. Holder , T. B. Humensky , C. A. Johnson , P. Kaaret , P. Kar , M. Kertzman , D. Kieda , F. Krennrich , S. Kumar , M. J. Lang , M. Lyutikov , A. S Madhavan , G. Maier , S. McArthur , A. McCann , K. Meagher , J. Millis , P. Moriarty , R. Mukherjee , D. Nieto , A. O'Faolain de Bhroithe , R. A. Ong , A. N. Otte , N. Park , M. Pohl , A. Popkow , H. Prokoph , E. Pueschel , J. Quinn , K. Ragan , L. C. Reyes , P. T. Reynolds , G. T. Richards , E. Roache , M. Santander , G. H. Sembroski , K. Shahinyan , A. W. Smith , D. Staszak , I. Telezhinsky , J. V. Tucci , J. Tyler , A. Varlotta , S. Vincent , S. P. Wakely , A. Weinstein , D. A. Williams , A. Zajczyk , B. Zitzer

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Abstract

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 were phase-folded using a Geminga pulsar timing solution derived from data recorded by the XMM-\emph{Newton} and \emph{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 $\times10^{-13}$ s $^{-1}$ cm $^{-2}$ and 1.7 $\times10^{-13}$ 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 five years of data from the \emph{Fermi}-LAT, constrain possible hardening of the Geminga pulsar emission spectra above $\sim$ 50 GeV.

Keywords

Geminga pulsar very-high-energy gamma rays VERITAS pulsed emission integral flux upper limits spectral energy distribution Fermi-LAT

Cite

@article{arxiv.1412.4734,
  title  = {A Search for Pulsations from Geminga Above 100 GeV with VERITAS},
  author = {E. Aliu and S. Archambault and A. Archer and T. Aune and A. Barnacka and M. Beilicke and W. Benbow and R. Bird and J. H. Buckley and V. Bugaev and K. Byrum and J. V Cardenzana and M. Cerruti and X. Chen and L. Ciupik and M. P. Connolly and W. Cui and H. J. Dickinson and J. Dumm and J. D. Eisch and M. Errando and A. Falcone and Q. Feng and J. P. Finley and H. Fleischhack and P. Fortin and L. Fortson and A. Furniss and G. H. Gillanders and S. Griffin and S. T. Griffiths and J. Grube and G. Gyuk and N. Hakansson and D. Hanna and J. Holder and T. B. Humensky and C. A. Johnson and P. Kaaret and P. Kar and M. Kertzman and D. Kieda and F. Krennrich and S. Kumar and M. J. Lang and M. Lyutikov and A. S Madhavan and G. Maier and S. McArthur and A. McCann and K. Meagher and J. Millis and P. Moriarty and R. Mukherjee and D. Nieto and A. O'Faolain de Bhroithe and R. A. Ong and A. N. Otte and N. Park and M. Pohl and A. Popkow and H. Prokoph and E. Pueschel and J. Quinn and K. Ragan and L. C. Reyes and P. T. Reynolds and G. T. Richards and E. Roache and M. Santander and G. H. Sembroski and K. Shahinyan and A. W. Smith and D. Staszak and I. Telezhinsky and J. V. Tucci and J. Tyler and A. Varlotta and S. Vincent and S. P. Wakely and A. Weinstein and D. A. Williams and A. Zajczyk and B. Zitzer},
  journal= {arXiv preprint arXiv:1412.4734},
  year   = {2015}
}

Comments

7 pages, 2 figures, 2 tables. Accepted for publication in ApJ

A Search for Pulsations from Geminga Above 100 GeV with VERITAS

Abstract

Keywords

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