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K. Ragan

Identifiers

  • name variant K. Ragan 0.60 · backfill

Papers (122)

  1. The exceptional 2017 gamma-ray flare of the radio galaxy NGC 1275: VERITAS and Multiwavelength Observations astro-ph.HE · 2026 · author #49
  2. Investigation of the Microquasar SS 433 with VERITAS astro-ph.HE · 2026 · author #45
  3. Measurement of the photosphere oblateness of $\gamma$ Cassiopeiae via Stellar Intensity Interferometry with the VERITAS Observatory astro-ph.SR · 2025 · author #44
  4. Direct measurement of stellar angular diameters by the VERITAS Cherenkov Telescopes astro-ph.SR · 2019 · author #42
  5. VERITAS and Fermi-LAT observations of new HAWC sources astro-ph.HE · 2018 · author #45
  6. VERITAS observations of the BL Lac object TXS 0506+056 astro-ph.HE · 2018 · author #42
  7. HESS J1943+213: An Extreme Blazar Shining Through The Galactic Plane astro-ph.HE · 2018 · author #45
  8. A Very High Energy $\gamma$-Ray Survey towards the Cygnus Region of the Galaxy astro-ph.HE · 2018 · author #52
  9. A strong limit on the very-high-energy emission from GRB 150323A astro-ph.HE · 2018 · author #47
  10. Multiwavelength observations of the blazar BL Lacertae: a new fast TeV gamma-ray flare astro-ph.HE · 2018 · author #43
  11. VERITAS contributions to the 35th International Cosmic Ray Conference astro-ph.HE · 2017 · author #49
  12. Discovery of very-high-energy emission from RGB J2243+203 and derivation of its redshift upper limit astro-ph.HE · 2017 · author #51
  13. Very-High-Energy $\gamma$-Ray Observations of the Blazar 1ES 2344+514 with VERITAS astro-ph.HE · 2017 · author #66
  14. Gamma-ray Observations Under Bright Moonlight with VERITAS astro-ph.IM · 2017 · author #50
  15. Multiwavelength follow-up of a rare IceCube neutrino multiplet astro-ph.HE · 2017 · author #481
  16. Gamma-ray observations of Tycho's SNR with VERITAS and Fermi astro-ph.HE · 2017 · author #47
  17. A luminous and isolated gamma-ray flare from the blazar B2 1215+30 astro-ph.HE · 2017 · author #56
  18. Search for Magnetically Broadened Cascade Emission From Blazars with VERITAS astro-ph.HE · 2017 · author #39
  19. A search for spectral hysteresis and energy-dependent time lags from X-ray and TeV gamma-ray observations of Mrk 421 astro-ph.HE · 2016 · author #52
  20. Very High-Energy Gamma-Ray Follow-Up Program Using Neutrino Triggers from IceCube hep-ex · 2016 · author #521
  21. A Search for Very High-Energy Gamma Rays from the Missing Link Binary Pulsar J1023+0038 with VERITAS astro-ph.HE · 2016 · author #63
  22. Very-high-energy observations of the binaries V 404 Cyg and 4U 0115+634 during giant X-ray outbursts astro-ph.HE · 2016 · author #49
  23. Discovery of Very High Energy Gamma Rays from 1ES 1440+122 astro-ph.HE · 2016 · author #69
  24. Very High Energy outburst of Markarian 501 in May 2009 astro-ph.HE · 2016 · author #79
  25. VERITAS and Multiwavelength Observations of the BL Lacertae Object 1ES 1741+196 astro-ph.HE · 2016 · author #66
  26. Upper limits from five years of blazar observations with the VERITAS Cherenkov telescopes astro-ph.HE · 2016 · author #61
  27. TeV Gamma-ray Observations of The Galactic Center Ridge By VERITAS astro-ph.HE · 2016 · author #55
  28. A Search for Brief Optical Flashes Associated with the SETI Target KIC 8462852 astro-ph.IM · 2016 · author #64
  29. Exceptionally bright TeV flares from the binary LS I +61$^\circ$ 303 astro-ph.HE · 2016 · author #68
  30. Gamma rays from the quasar PKS 1441+25: story of an escape astro-ph.HE · 2015 · author #67
  31. VERITAS Collaboration Contributions to the 34th International Cosmic Ray Conference astro-ph.HE · 2015 · author #71
  32. Science Highlights from VERITAS astro-ph.HE · 2015 · author #71
  33. First NuSTAR Observations of Mrk 501 within a Radio to TeV Multi-Instrument Campaign astro-ph.HE · 2015 · author #215
  34. VERITAS detection of $\gamma$-ray flaring activity from the BL Lac object 1ES 1727+502 during bright moonlight observations astro-ph.HE · 2015 · author #62
  35. Investigating Broadband Variability of the TeV Blazar 1ES 1959+650 astro-ph.HE · 2014 · author #68
  36. VERITAS Observations of the BL Lac Object PG 1553+113 astro-ph.HE · 2014 · author #68
  37. The most powerful flaring activity from the NLSy1 PMN J0948+0022 astro-ph.HE · 2014 · author #59
  38. Constraints on Very High Energy Emission from GRB 130427A astro-ph.HE · 2014 · author #66
  39. Investigating the TeV Morphology of MGRO J1908+06 with VERITAS astro-ph.HE · 2014 · author #64
  40. Deep Broadband Observations of the Distant Gamma-ray Blazar PKS 1424+240 astro-ph.HE · 2014 · author #60
  41. Observations of the unidentified gamma-ray source TeV J2032+4130 by VERITAS astro-ph.HE · 2014 · author #59
  42. A Three-Year Multi-Wavelength Study of the Very High Energy Gamma-ray Blazar 1ES 0229+200 astro-ph.HE · 2013 · author #67
  43. Long-term TeV and X-ray Observations of the Gamma-ray Binary HESS J0632+057 astro-ph.HE · 2013 · author #62
  44. VERITAS Observations of the Microquasar Cygnus X-3 astro-ph.HE · 2013 · author #58
  45. Observation of Markarian 421 in TeV gamma rays over a 14-year time span astro-ph.HE · 2013 · author #57
  46. Multiwavelength Observations of The TeV Binary LS I +61 303 with VERITAS, Fermi-LAT and Swift-XRT During a TeV Outburst astro-ph.HE · 2013 · author #54
  47. Long term observations of B2 1215+30 with VERITAS astro-ph.HE · 2013 · author #59
  48. A search for enhanced very high energy gamma-ray emission from the March 2013 Crab Nebula flare astro-ph.HE · 2013 · author #57
  49. VERITAS contributions to the 33rd International Cosmic Ray Conference astro-ph.HE · 2013 · author #65
  50. Discovery of a new TeV gamma-ray source: VER J0521+211 astro-ph.HE · 2013 · author #57
  51. Multiwavelength observations and modeling of 1ES 1959+650 in a low flux state astro-ph.HE · 2013 · author #64
  52. Discovery of TeV Gamma-ray Emission Toward Supernova Remnant SNR G78.2+2.1 astro-ph.HE · 2013 · author #73
  53. Discovery of TeV Gamma-ray Emission from CTA 1 by VERITAS astro-ph.HE · 2012 · author #65
  54. Rapid TeV Gamma-Ray Flaring of BL Lacertae astro-ph.HE · 2012 · author #50
  55. VERITAS Observations of Six Bright, Hard-Spectrum Fermi-LAT Blazars astro-ph.HE · 2012 · author #61
  56. Search for a correlation between very-high-energy gamma rays and giant radio pulses in the Crab pulsar astro-ph.HE · 2012 · author #65
  57. Multiwavelength observations of the AGN 1ES 0414+009 with VERITAS, Fermi-LAT, Swift-XRT, and MDM astro-ph.HE · 2012 · author #64
  58. VERITAS Observations of the Nova in V407 Cygni astro-ph.HE · 2012 · author #67
  59. Discovery of High-energy and Very High Energy Gamma-ray Emission from the Blazar RBS 0413 astro-ph.HE · 2012 · author #68
  60. VERITAS Observations of day-scale flaring of M87 in 2010 April astro-ph.CO · 2011 · author #64
  61. The 2010 very high energy gamma-ray flare & 10 years of multi-wavelength observations of M 87 astro-ph.CO · 2011 · author #401
  62. VERITAS Collaboration Contributions to the 32nd International Cosmic Ray Conference astro-ph.HE · 2011 · author #71
  63. VERITAS: Status and Highlights astro-ph.HE · 2011 · author #71
  64. Multiwavelength Observations of the Previously Unidentified Blazar RX J0648.7+1516 astro-ph.HE · 2011 · author #60
  65. VERITAS Observations of Gamma-Ray Bursts Detected by Swift astro-ph.HE · 2011 · author #59
  66. Detection of Pulsed Gamma Rays Above 100 GeV from the Crab Pulsar astro-ph.HE · 2011 · author #68
  67. VERITAS Observations of the Unusual Extragalactic Transient Swift J164449.3+573451 astro-ph.HE · 2011 · author #58
  68. Multiwavelength Observations of the VHE Blazar 1ES 2344+514 astro-ph.HE · 2011 · author #51
  69. TeV and Multi-wavelength Observations of Mrk 421 in 2006-2008 astro-ph.HE · 2011 · author #55
  70. VERITAS Observations of the TeV Binary LS I +61 303 During 2008-2010 astro-ph.HE · 2011 · author #60
  71. Very high-energy observations of the two high-frequency peaked BL Lac objects 1ES 1218+304 and H 1426+428 astro-ph.HE · 2011 · author #16
  72. Gamma-ray observations of the Be/pulsar binary 1A 0535+262 during a giant X-ray outburst astro-ph.HE · 2011 · author #52
  73. Discovery of TeV Gamma Ray Emission from Tycho's Supernova Remnant astro-ph.HE · 2011 · author #59
  74. Spectral Energy Distribution of Markarian 501: Quiescent State vs. Extreme Outburst astro-ph.HE · 2010 · author #54
  75. VERITAS Search for VHE Gamma-ray Emission from Dwarf Spheroidal Galaxies astro-ph.CO · 2010 · author #49
  76. The Discovery of gamma-Ray Emission From The Blazar RGB J0710+591 astro-ph.HE · 2010 · author #62
  77. Discovery of VHE $\gamma$-ray emission from the SNR G54.1+0.3 astro-ph.HE · 2010 · author #57
  78. Observations of the shell-type SNR Cassiopeia A at TeV energies with VERITAS astro-ph.HE · 2010 · author #60
  79. Discovery of Variability in the Very High Energy Gamma-Ray Emission of 1ES 1218+304 with VERITAS astro-ph.HE · 2010 · author #52
  80. Highlight Talk: Recent Results from VERITAS astro-ph.HE · 2009 · author #58
  81. Detection of Extended VHE Gamma Ray Emission from G106.3+2.7 with VERITAS astro-ph.HE · 2009 · author #59
  82. A connection between star formation activity and cosmic rays in the starburst galaxy M 82 astro-ph.CO · 2009 · author #68
  83. Multiwavelength observations of a TeV-Flare from W Comae astro-ph.HE · 2009 · author #57
  84. Observation of Extended VHE Emission from the Supernova Remnant IC 443 with VERITAS astro-ph.HE · 2009 · author #67
  85. Evidence for long-term Gamma-ray and X-ray variability from the unidentified TeV source HESS J0632+057 astro-ph.HE · 2009 · author #61
  86. Multiwavelength Observations of LS I +61 303 with VERITAS, Swift and RXTE astro-ph.HE · 2009 · author #63
  87. OSETI with STACEE: A Search for Nanosecond Optical Transients from Nearby Stars astro-ph.EP · 2009 · author #14
  88. VERITAS observations of the BL Lac 1ES 1218+304 astro-ph.HE · 2009 · author #59
  89. VERITAS Observations of a Very High Energy Gamma-ray Flare from the Blazar 3C 66A astro-ph.HE · 2009 · author #67
  90. Discovery of Very High-Energy Gamma-Ray Radiation from the BL Lac 1ES 0806+524 astro-ph · 2008 · author #68
  91. Galactic Compact Objects Section of the White Paper on the Status and Future of Ground-based TeV Gamma-ray Astronomy astro-ph · 2008 · author #22
  92. Status of the VERITAS Observatory astro-ph · 2008 · author #61
  93. VERITAS Discovery of >200GeV Gamma-ray Emission from the Intermediate-frequency-peaked BL Lac Object W Comae astro-ph · 2008 · author #61
  94. VERITAS Observations of the gamma-Ray Binary LS I +61 303 astro-ph · 2008 · author #57
  95. Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS astro-ph · 2008 · author #58
  96. Observations of the Pulsar PSR B1951+32 with the Solar Tower Atmospheric Cherenkov Effect Experiment astro-ph · 2007 · author #15
  97. STACEE Observations of 1ES 1218+304 astro-ph · 2007 · author #15
  98. Gamma-Ray Burst Follow-up Observations with STACEE During 2003-2007 astro-ph · 2007 · author #14
  99. Search for Dark Matter Annihilation in Draco with STACEE astro-ph · 2007 · author #14
  100. Very high energy observations of the BL Lac objects 3C 66A and OJ 287 astro-ph · 2007 · author #15
  101. Very High Energy Observations of Gamma-Ray Burst Locations with the Whipple Telescope astro-ph · 2007 · author #45
  102. The Energy Spectrum of the Blazar Markarian 421 Above 130 GeV astro-ph · 2006 · author #15
  103. Observations of the Unidentified TeV Gamma-Ray Source TeV J2032+4130 with the Whipple Observatory 10 m Telescope astro-ph · 2006 · author #44
  104. The First VERITAS Telescope astro-ph · 2006 · author #59
  105. TeV Gamma-Ray Observations of the Perseus and Abell 2029 Galaxy Clusters astro-ph · 2006 · author #35
  106. The STACEE Ground-Based Gamma-Ray Detector astro-ph · 2005 · author #15
  107. Observations of the BL Lac Object 3C 66A with STACEE astro-ph · 2005 · author #13
  108. STACEE Observations of Mrk 421 During the 2001 Flare astro-ph · 2003 · author #13
  109. STACEE Observations of Markarian 421 During an Extended Gamma-Ray Outburst astro-ph · 2002 · author #12
  110. The STACEE-32 Ground Based Gamma-ray Detector astro-ph · 2002 · author #14
  111. The Status of the STACEE Observatory astro-ph · 2001 · author #11
  112. Performance of the STACEE Atmospheric Cherenkov Telescope astro-ph · 2000 · author #16
  113. High Energy Gamma-Ray Observations of the Crab Nebula and Pulsar with the Solar Tower Atmospheric Cherenkov Effect Experiment astro-ph · 2000 · author #13
  114. Very High Energy Gamma-ray spectral properties of Mrk 501 from CAT Cerenkov telescope observations in 1997 astro-ph · 1999 · author #29
  115. A new analysis method for very high definition Imaging Atmospheric Cherenkov Telescopes as applied to the CAT telescope astro-ph · 1998 · author #29
  116. The CAT Imaging Telescope for Very-High-Energy Gamma-Ray Astronomy astro-ph · 1998 · author #43
  117. Prototype Tests for the CELESTE Solar Array Gamma--Ray Telescope astro-ph · 1998 · author #23
  118. Performances of the CAT imaging telescope and some preliminary results on Mkn 180 and the Crab astro-ph · 1997 · author #29
  119. Spectrum and Variability of Mrk501 as observed by the CAT Imaging Telescope astro-ph · 1997 · author #29
  120. Detection of Vhe Gamma-Rays from MRK 501 with the Cat Imaging Telescope astro-ph · 1997 · author #29
  121. Observation of the Crab Nebula Gamma-Ray Emission Above 220 Gev by the Cat Cherenkov Imaging Telescope astro-ph · 1997 · author #29
  122. The CAT Imaging Telescope astro-ph · 1997 · author #29

Mentions

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Frequent Coauthors