Aliu, E., Archambault, S., Archer, A., Aune, T., Barnacka, A., Beilicke, M., Benbow, Wystan, Bird, R., Buckley, J. H., Bugaev, V., Byrum, K., Cardenzana, J. V., Cerruti, M., Chen, X., Ciupik, L., Connolly, M. P., Cui, W., Dickinson, H. J., Dumm, J., Eisch, J. D., Errando, M., Falcone, A., Feng, Q., Finley, J. P., Fleischhack, H. et al. 2015. "A Search for Pulsations from Geminga above 100 GeV with VERITAS." The Astrophysical Journal, 800 61. https://doi.org/10.1088/0004-637X/800/1/61.
IN: 47907, USA), AY(DESY, Platanenallee 6, D-15738 Zeuthen, Germany), AZ(Fred Lawrence Whipple Observatory, Harvard-Smithsonian Center for Astrophysics, Amado, AZ 85645, USA), BA(School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA), BB(Santa Cruz Institute for Particle Physics and Department of Physics, University of California, Santa Cruz, CA 95064, USA), BC(School of Physics, National University of Ireland Galway, University Road, Galway, Ireland), BD(Physics Department, McGill University, Montreal, QC H3A 2T8, Canada), BE(Department of Physics and Astronomy, Univer! sity of Iowa, Van Allen Hall, Iowa City, IA 52242, USA), BF(Astronomy Department, Adler Planetarium and Astronomy Museum, Chicago, IL 60605, USA), BG(Astronomy Department, Adler Planetarium and Astronomy Museum, Chicago, IL 60605, USA), BH(Institute of Physics and Astronomy, University of Potsdam, D-14476 Potsdam-Golm, Germany), BI(Physics Department, McGill University, Montreal, QC H3A 2T8, Canada), BJ(Department of Physics and Astronomy and the Bartol Research Institute, University of Delaware, Newark, DE 19716, USA), BK(Physics Department, Columbia University, New York, NY 10027, USA), BL(Santa Cruz Institute for Particle Physics and Department of Physics, University of California, Santa Cruz, CA 95064, USA), BM(Department of Physics and Astronomy, University of Iowa, Van Allen Hall, Iowa City, IA 52242, USA), BN(Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA), BO(Department of Physics and Astronomy, DePauw University, Greencastle,! IN 46135-0037, USA), BP(Department of Physics and Astronomy, Universit! y of Utah, Salt Lake City, UT 84112, USA), BQ(Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA), BR(Department of Physics and Astronomy and the Bartol Research Institute, University of Delaware, Newark, DE 19716, USA), BS(School of Physics, National University of Ireland Galway, University Road, Galway, Ireland), BT(Department of Physics and Astronomy, Purdue University, West Lafayette, IN 47907, USA), BU(Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA), BV(DESY, Platanenallee 6, D-15738 Zeuthen, Germany), BW(Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, USA), BX(Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA), BY(School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, 837 State Street NW, Atlanta, GA 30332-0430,USA), BZ(Department of Physics, Anderson University, 1100 East 5th Street, Anderson, IN 46012, USA), CA(S! chool of Physics, National University of Ireland Galway, University Road, Galway, Ireland), CB(Department of Physics and Astronomy, Barnard College, Columbia University, NY 10027, USA), CC(Physics Department, Columbia University, New York, NY 10027, USA), CD(DESY, Platanenallee 6, D- 15738 Zeuthen, Germany), CE(Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA), CF(School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, 837 State Street NW, Atlanta, GA 30332-0430,USA), CG(Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, USA), CH(Institute of Physics and Astronomy, University of Potsdam, D- 14476 Potsdam-Golm, Germany; DESY, Platanenallee 6, D-15738 Zeuthen, Germany), CI(Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA), CJ(DESY, Platanenallee 6, D-15738 Zeuthen, Germany), CK(School of Physics, University College Dublin, Belfield, Dublin 4, Ire! land), CL(School of Physics, University College Dublin, Belfield, Dubli! n 4, Ireland), CM(Physics Department, McGill University, Montreal, QC H3A 2T8, Canada), CN(Physics Department, California Polytechnic State University, San Luis Obispo, CA 94307, USA), CO(Department of Applied Physics and Instrumentation, Cork Institute of Technology, Bishopstown, Cork, Ireland), CP(School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, 837 State Street NW, Atlanta, GA 30332-0430,USA), CQ(Fred Lawrence Whipple Observatory, Harvard- Smithsonian Center for Astrophysics, Amado, AZ 85645, USA), CR(Department of Physics and Astronomy, Barnard College, Columbia University, NY 10027, USA), CS(Department of Physics and Astronomy, Purdue University, West Lafayette, IN 47907, USA), CT(School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA), CU(Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA), CV(Physics Department, McGill University, Montreal,; 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.
IN: 47907, USA), AY(DESY, Platanenallee 6, D-15738 Zeuthen, Germany), AZ(Fred Lawrence Whipple Observatory, Harvard-Smithsonian Center for Astrophysics, Amado, AZ 85645, USA), BA(School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA), BB(Santa Cruz Institute for Particle Physics and Department of Physics, University of California, Santa Cruz, CA 95064, USA), BC(School of Physics, National University of Ireland Galway, University Road, Galway, Ireland), BD(Physics Department, McGill University, Montreal, QC H3A 2T8, Canada), BE(Department of Physics and Astronomy, Univer! sity of Iowa, Van Allen Hall, Iowa City, IA 52242, USA), BF(Astronomy Department, Adler Planetarium and Astronomy Museum, Chicago, IL 60605, USA), BG(Astronomy Department, Adler Planetarium and Astronomy Museum, Chicago, IL 60605, USA), BH(Institute of Physics and Astronomy, University of Potsdam, D-14476 Potsdam-Golm, Germany), BI(Physics Department, McGill University, Montreal, QC H3A 2T8, Canada), BJ(Department of Physics and Astronomy and the Bartol Research Institute, University of Delaware, Newark, DE 19716, USA), BK(Physics Department, Columbia University, New York, NY 10027, USA), BL(Santa Cruz Institute for Particle Physics and Department of Physics, University of California, Santa Cruz, CA 95064, USA), BM(Department of Physics and Astronomy, University of Iowa, Van Allen Hall, Iowa City, IA 52242, USA), BN(Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA), BO(Department of Physics and Astronomy, DePauw University, Greencastle,! IN 46135-0037, USA), BP(Department of Physics and Astronomy, Universit! y of Utah, Salt Lake City, UT 84112, USA), BQ(Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA), BR(Department of Physics and Astronomy and the Bartol Research Institute, University of Delaware, Newark, DE 19716, USA), BS(School of Physics, National University of Ireland Galway, University Road, Galway, Ireland), BT(Department of Physics and Astronomy, Purdue University, West Lafayette, IN 47907, USA), BU(Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA), BV(DESY, Platanenallee 6, D-15738 Zeuthen, Germany), BW(Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, USA), BX(Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA), BY(School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, 837 State Street NW, Atlanta, GA 30332-0430,USA), BZ(Department of Physics, Anderson University, 1100 East 5th Street, Anderson, IN 46012, USA), CA(S! chool of Physics, National University of Ireland Galway, University Road, Galway, Ireland), CB(Department of Physics and Astronomy, Barnard College, Columbia University, NY 10027, USA), CC(Physics Department, Columbia University, New York, NY 10027, USA), CD(DESY, Platanenallee 6, D- 15738 Zeuthen, Germany), CE(Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA), CF(School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, 837 State Street NW, Atlanta, GA 30332-0430,USA), CG(Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, USA), CH(Institute of Physics and Astronomy, University of Potsdam, D- 14476 Potsdam-Golm, Germany; DESY, Platanenallee 6, D-15738 Zeuthen, Germany), CI(Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA), CJ(DESY, Platanenallee 6, D-15738 Zeuthen, Germany), CK(School of Physics, University College Dublin, Belfield, Dublin 4, Ire! land), CL(School of Physics, University College Dublin, Belfield, Dubli! n 4, Ireland), CM(Physics Department, McGill University, Montreal, QC H3A 2T8, Canada), CN(Physics Department, California Polytechnic State University, San Luis Obispo, CA 94307, USA), CO(Department of Applied Physics and Instrumentation, Cork Institute of Technology, Bishopstown, Cork, Ireland), CP(School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, 837 State Street NW, Atlanta, GA 30332-0430,USA), CQ(Fred Lawrence Whipple Observatory, Harvard- Smithsonian Center for Astrophysics, Amado, AZ 85645, USA), CR(Department of Physics and Astronomy, Barnard College, Columbia University, NY 10027, USA), CS(Department of Physics and Astronomy, Purdue University, West Lafayette, IN 47907, USA), CT(School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA), CU(Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA), CV(Physics Department, McGill University, Montreal,; 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.
