Neil Gehrels
(also known as Cornelis A. Gehrels)

Astrophysics Science Division
NASA/GSFC
Code 661, Astroparticle Physics Laboratory
Greenbelt, MD 20771

tel: 301-286-6546
fax: 301-286-0677
e-mail: cornelis.a.gehrels @ nasa.gov

Present Position

Chief, Astroparticle Physics Laboratory, NASA/GSFC
Adjunct Professor of Astronomy, U. Maryland
Adjunct Professor of Astronomy & Astrophysics, Penn State

Brief Bio

Neil Gehrels is an experimental physicist working in gamma-ray astronomy who is active in instrument development and data analysis, and dabbles in theory. His interests include gamma-ray bursts and supernovae. He is Principal Investigator for the Swift gamma-ray burst MIDEX mission. Other responsibilities include Project Scientist for the Compton Observatory (1991-2000), Mission Scientist for INTEGRAL, a Deputy Project Scientist for GLAST and Project Scientist for JDEM. Committees, societies, etc. include past Chair of the AAS High Energy Astrophysics Division and the APS Division of Astrophysics, Fellow of the APS and member of the American Academy of Arts and Sciences. His wife, Ellen Williams, is a Distinguished Professor of physics in the surface physics group at the University of Maryland. He has two children, Tommy and Emily, born in 1987 and 1990. His other interests include music and moutaineering. He climbed the Nose Route on El Capitan in Yosemite in a 6 day solo ascent in 2006.

Educational Background

Honors and Awards

2009, Maria & Eric Muhlmann Award, Astronomical Society of the Pacific, Swift Team
2009, George W. Goddard Award, SPIE society
2009, Henry Draper Medal, National Academy of Sciences
2008, Election to American Academy of Arts and Sciences
2007, Bruno Rossi Prize, American Astronomical Society, with the Swift Team
2006, Popular Science, Best of What's New award, Swift Team
2005, NASA Exceptional Scientific Achievement Medal
2005, GSFC Lindsay Award
2000, Randolph Lovelace Award, American Astronautical Society
1993, Fellow, American Physical Society
1993, NASA Outstanding Leadership Medal
1992, Discover Magazine Award for Technological Innovation
1976-1977, Caltech Graduate Fellowship
1975, Phi Beta Kappa

Projects

Committees and Offices

Books

6. 2006, Gamma-Ray Bursts in the Swift Era, ed. S. S. Holt, N. Gehrels, J. A. Nousek, AIP Conf. Proc. xxx (AIP, New York).

5. 2001, Gamma 2001, ed. S. M. Ritz, N. Gehrels and C. R. Shrader, AIP Conf. Proc. 587 (AIP, New York).

4. 1994, Second Compton Symposium, ed. C. E. Fichtel, N. Gehrels, and J. Norris, AIP Conf. Proc. 304 (AIP, New York).

3. 1993, Compton Gamma-Ray Observatory, ed. M. Friedlander, N. Gehrels and D. Macomb, AIP Conf. Proc. 280 (AIP, New York).

2. 1991, Compton Observatory Science Workshop, ed. C. R. Shrader, N. Gehrels and B. Dennis, NASA Conference Publication 3137.

1. 1988, Nuclear Spectroscopy of Astrophysical Sources, ed. N. Gehrels and G. H. Share, AIP Conf. Proc. 170 (AIP, New York).

Select Invited Talks

149. 2008 "GRBs and the Birth of Black Holes", Public Lecture, Smithsonian, May 1

146. 2008 "Gamma Ray Burst Discoveries with Swift", AAS Rossi Prize lecture, Jan 10

145. 2007 "Short GRBs and Gravitational Waves", MIT Gravitational Wave Conf., Dec 13

142. 2007 "Status and Future of Swift", Santa Fe GRB conference, Santa Fe, Nov 5

141. 2007 "GRB Discoveries with Swift", Physics Colloquium, Iowa State U., Oct 29

140. 2007 "Recent Progress in GRB Astrophysics", High Energy Physics Seminar, UMd, Oct 14

139. 2007 "Swift: Understanding GRBs", Villa Olmo conference, Como, Italy, Oct 8

138. 2007 "GRBs and the Birth of Black Holes", UC Dublin evening lecture popular, Sep 25

137. 2007 "GRB Discoveries with Swift", Relativistic Outflows conference, Dublin, Ireland, Sept 24

136. 2007 "GRB Discoveries with Swift", Compact Objects conference, Huangshan, China, July 2

135. 2007, "Very High Energy Emission from GRBs", TeV Future Workshop, Chicago, May 13

134. 2007, "GRB Discoveries with Swift", Institut d'Astrophysique de Paris, May 11

132. 2007, "Opportunities for Future Progress with Swift", Swift Future Conf., PSU, May 1

131. 2007, "Short GRB observations with Swift", Ringberg Castle Conf., Munich, Mar 26

127. 2006, "GRB Discoveries with Swift", Physics Colloquium, Penn State, Nov. 30

124. 2006, "Space Observations of GRBs", Royal Society Conference, London, Sept 18

123. 2006, "Gamma Ray Burst Discoveries with Swift", COSPAR plenary lecture, July 18

121. 2006, "The Global Approach to Swift GRB Science", Swift Symposium, Venice, June 5

80. 2000, "GeV Gamma Ray Astronomy in the GLAST Era", Heidelberg Symposium, June 26

50. 1996, "Recent Results from the Compton Observatory", ASCA Symp. Tokyo, March 14

34. 1993, "The Cosmic Diffuse Gamma-Ray Background", STScI Meeting for Giacconi, May 18

32. 1993, "Gamma Rays from Active Galactic Nuclei: GRO Surprises", AAS, January 6

27. 1992, "The Gamma Ray Sky", Smithsonian Astronomy Series, Ripley Center, November 14

Articles In Popular Science Journals

6. 2008 "Swift Gamma Ray Bursts and Other Explosions", J. Osborne, N. Gehrels & J. Nousek, Space Research Today, 172, p. 17.

5. 2008 "GLAST Goes for Blast-Off", J. McEnery, S. Ritz, & N. Gehrels, Physics World, May 2008 issue, p. 31.

4. 2002, "The Brightest Explosions in the Universe", N. Gehrels, L. Piro and P Leonard, Sci. Am., 287, No. 6, (Dec. 2002), 84.

3. 1999, "Revisiting the Black Hole", R. Blandford and N. Gehrels, Physics Today, June 1999 issue, p. 40.

2. 1998, "The New Gamma Ray Astronomy", N. Gehrels and J. Paul, Physics Today, February 1998 issue, p. 26.

1. 1993, "The Compton Gamma Ray Observatory", N. Gehrels, C. E. Fichtel, G. J. Fishman, J. D. Kurfess and V. SchÃ¶nfelder, Sci Am, December, 68.

Selected Publications

233. 2009 "Gamma Ray Bursts in the Swift Era", N. Gehrels, E. Ramirez-Ruiz & D. Fox, ARAA, submitted.

232. 2008 "Correlations in Prompt and Afterglow Emission in Swift Long and Short Gamma Ray Bursts", N. Gehrels, et al., ApJ, 689, 1161.

231. 2008 "Cosmic X-ray Background and Earth Albedo Spectra with Swift BAT", M. Ajello, et al., ApJ, 689, 655.

230. 2008 "Monitoring Supergiant Fast X-ray Transients with Swift. I. Behavior Outside Outbursts", Sidole, L. et al., ApJ, 687, 1230.

229. 2008 "Gamma-ray Burst Overview", N. Gehrels, Classical & Quantum Gravity, 25, 1.

228. 2008 "GRB 080319B: A Naked Eye Stellar Blast from the Distant Universe", J. Racusin, et al., Nature, 455, 183.

227. 2008 "A Swift Gaze at the Burst Forest of SGR 1900+14", G. Israel, et al, ApJ, 685, 1114.

225. 2008 "High-Redshift Blazar Identification for Swift J1656.3-3302", N. Masetti, et al., A&A, 480, 715.

224. 2008 "Bright Flares from the X-ray Pulsar SWIFT J1626.6-5156", P. Reig, et al., A&A, in prep.

223. 2008 "Bright Flares from the X-ray Pulsar SWIFT J1626.6-5156", P. Reig, T. Belloni, G. Israel, S. Campana, N. Gehrels, & J. Homan, A&A, in prep.

222. 2007 "GRB 060607A" A GRB with Bright Asynchronous Early X-ray and Optical Emissions", H. Ziaeepour, et al., MNRAS, submitted.

221. 2007 "The First GRB Localized by SuperAGILE Onboard AGILE and Its Swift XRT Afterglow", E. Del Monte, et al. A&A, accepted.

220. 2007 "Probing th Complex Environments of Host Galaxies: High Resolution Spectroscopy of GRB 050922C", S. Piranomonte, et al., A&A, submitted.

219. 2007 "High-redshift Blazar Identification for Swift J1656.3-3302", N. Masetti, et al., A&A, submitted

217. 2007 "Cynus X-3 Transition from the Ultrasoft to the Hard State", V. Beckmann, et al. A&A, in prep.

217. 2008 "Cosmic X-ray Background and Earth Albedo Spectra with Swift BAT", M. Ajello, et al. ApJ, 689, 655.

215. 2008 "Glimm's Method for Relativistic Hydrodynamics", J. Cannizzo, N. Gehrels, & E. Vishniac, ApJ, 680, 885.

214. 2008 "Global Properties of X-ray Flashes and X-ray Rich GRBs Observed by Swift", T. Sakamoto, et al., ApJ, 679, 570.

213. 2008 "The Swift BAT X-Ray Survey. III. X-Ray Spectra and Statistical Properties, M. Ajello, et al., ApJ, 673, 96.

212. 2007 "Characteristics of EGRET Blazars in the VLBA Imaging and Polarimetry Survey (VIPS)", G. Taylor, et al. ApJ, 671, 1355.

211. 2007 "The First Survey of X-Ray Flares from Gamma-Ray Bursts Observed by Swift: Spectral Properties and Energetics", A. Falcone, et al., ApJ, 671, 1921.

210. 2007 "The First Survey of X-Ray Flares from Gamma-Ray Bursts Observed by Swift: Temporal Properties and Morphology", G. Chincarini, et al., ApJ, 671, 1903.

209. 2007 "The Dark Side of ROTSE-III Prompt GRB Observations", S. Yost, et al., ApJ, 669, 1107

208. 2007 "Swift/XRT Monitoring of Five Orbital Cycles of LSI+61303", P. Esposito, P. Caraveo, A. Pellizzoni, A. De Luca, N. Gehrels & M. Marelli, A&A, 474, 575.

207. 2007 "Detection of GRB 060927 at z = 5.47: Implications for the Use of Gamma-Ray Bursts as Probes of the End of the Dark Ages", A. Ruiz-Velasco, ApJ, 669, 1.

206. 2007 "IGR J22517+2218=MG3 J225155+2217: A New Gamma-Ray Lighthouse in the Distant Universe", L. Bassani, et al. ApJ, 669, L4.

205. 2007 "Extreme Properties Of GRB061007: A Highly Energetic Or A Highly Collimated Burst?", P. Schady, et al. MNRAS, 380, 1041.

204. 2007 "The Two-Component Afterglow of Swift GRB 050802", S. Oates, et al. MNRAS, 380, 270.

203. 2007 "Discovery of the Accretion-powered Millisecond Pulsar SWIFT J1756.9-2508 with a Low-Mass Companion", H. Krimm, et al. ApJ, 668, L147.

202. 2007 "Swift XRT Observations of 34 New INTEGRAL IBIS AGNs: Discovery of Compton-Thick and Other Peculiar Sources", A. Malizia, et al., ApJ, 668, 81.

201. 2007 "GRB 060714: No Clear Dividing Line Between Prompt Emission and X-Ray Flares", H. Krimm, et al., ApJ 665, 554.

200. 2007 "Suzaku Observations of Active Galactic Nuclei Detected in the Swift/BAT Survey: Discovery of "New Type'' of Buried Supermassive Black Holes", Y. Ueda, et al., ApJ, 664, L79.

199. 2007 "The Global Approach to Swift Gamma Ray Burst Science", N. Gehrels, Il Nuovo Cimento, 121, 1029.

198. 2007 "X-Ray, UV, and Optical Observations of Supernova 2006bp with Swift: Detection of Early X-Ray Emission", S. Immler, et al., ApJ, 664, 435.

197. 2007 "Swift Observations of GRB 060614: An Anomalous Burst with a Well-Behaved Afterglow", V. Mangano, et al., A&A, 470, 105.

196. 2007 "Simultaneous Swift and REM Monitoring of the Blazar PKS 0537-441 in 2005", E. Pian, et al., ApJ 664, 106.

195. 2007 "A Case of Mistaken Identityu? GRB 060912A and the Nature of the Long-Short GRB Divide", A. Levan, et al., MNRAS, 378, 1439.

194. 2007 "GRB 061121: Broadband Spectral Evolution through the Prompt and Afterglow Phases of a Bright Burst", K. Page, et al., ApJ, 663, 1125.

193. 2007 "Swift Observations of Classical Novae", J. Ness, G. Schwarz, A. Retter, S. Starrfield, J. Schmitt, N. Gehrels, D. Burrows, & J. Osborne, ApJ, 663, 505.

192. 2007 "An On-Line Repository of Swift/XRT Lightcurves of GRBs", P. Evans, et al., A&A, 469, 379.

191. 2007 "Swift Detection of Previously Undetected Blazars in a Microwave Flu-Limited Sample of WMAP Foreground Sources", P. Giommi, et al., A&A, 468, 571.

190. 2007 "Swift Multiwavelength Observations of the Bright Flaring Burst GRB 051117A", M. Goad, et al., A&A 468, 103.

189. 2007 "ROXA J081009.9-384757.0: A 10^47 erg s-1 Blazar with Hard X-ray Synchrotron Peak or a New Type of Radio Loud AGN?", P. Giommi, et al., A&A 468, 97.

188. 2007 "Swift Observations of TeV Bl Lacertae Objects", Tramacere, A., et al., A&A, 467, 501.

187. 2007 "Testing the Standard Fireball Model of GRBs Using Late X-ray Afterglows Measured by Swift", R. Willingale, et al., ApJ, 662, 1093.

186. 2007 "Long-Term Monitoring of the X-ray Afterglow of GRB 050318", M. Capalbi, et al., A&A, 462, 913.

185. 2007 "Swift XRT and UVOT Deep Observation of the High Energy Peaked Bl Lacertae Object PKS 0548-322 Close to it Brightest State", M. Perri, et al., A&A, 462, 889.

184. 2007 "Swift Observations of GRB 050904: The Most Distant Explosion Ever Observed", G. Cusumano, et al., A&A, 462, 73.

183. 2007 "Swift and XMM-Newton Observations of the Extraordinary GRB 060729", D. Grupe, et al., ApJ, 662, 443.

182. 2007 "Early Ultraviolet, Optical, and X-ray Observation of the Type IIP SN 2005cs with Swift", P. Brown, et al., ApJ, 659, 1488.

181. 2007 "The VLBA Imaging and Polarimetry Survey at 5 GHz", J. Helmboldt, et al., ApJ, 658, 203.

180. 2007 "Exploring Broadband GRB Behavior During Gamma-Ray Emission", S. Yost, et al., ApJ, 657, 925.

179. 2007 "Swift Discovery of Gamma-Ray Bursts without a Jet Break Feature in Their X-Ray Afterglows", G. Sato, et al., ApJ, 657, 359.

178. 2007 "Gamma Ray Bursts in the Swift Era", N. Gehrels, J. Cannizzo, and J. Norris, New J. Phys., 9, 37.

177. 2007 "Swift Ultraviolet Photometry of the Deep Impact Encounter with Comet 9P/Tempel 1", K. Mason, et al., Icarus, 187, 123.

176. 2007 "Making a Short Gamma-Ray Burst from a Long One: Implications for the Nature of GRB 060614", B. Zhang, et al., ApJ 655, L25.

175. 2007 "Swift XRT Observations of the Afterglow of XRF 050416A", V. Mangano, ApJ, 654, 403.

174. 2007 "Redshift Filtering by Swift Apparent X-ray Column Density", D. Grupe, et al., AJ, 133, 2216.

173. 2007 "Optical, Infrared, and Ultraviolet Observations of the X-Ray Flash GRB 050416A ", S. Holland, et al., AJ, 133, 122.

172. 2006 "The New Gamma Ray Burst Classification Scheme from GRB 060614", N. Gehrels et al., Nature, 444, 1044.

171. 2006 "Temporal Profiles and Spectral Lags of XRF 060218", E.W. Liang, B. Zhang, J. Norris, N. Gehrels, J. Zhang & Z. Dai, ApJ, 653, L81.

170. 2006 "Jet Breaks in Short Gamma Ray Bursts. I. The Collimated Afterglow of GRB 051221", D. Burrows, D. Grupe, M. Capalbi, A. Panaitescu, S. Patel, C. Kouveliotou, B. Zhang, P. Meszaros, G. Chincarini, N. Gehrels & R. Wijers, ApJ, 653, 468.

169. 2006 "Jet Breaks in Short Gamma Ray Bursts. I. The Uncollimated Afterglow of GRB 050724", D. Grupe, D. Burrows, S. Patel, C. Kouveliotou, B. Zhang, P. Meszaros, R. Wijers & N. Gehrels, ApJ, 653, 462.

168. 2006 "Very Early Optical Afterglow of GRBs: Evidence for Relative Paucity of Detection", P. Roming, et al., ApJ, 652, 1416.

167. 2006 "Panchromatic Observations of GRB 06124 from Precursor to Afterglow", P. Romano, et al., A&A, 456, 917.

166. 2006 "Swift and Infra-Red Observations of the Blazar 3C 454.3 During the Giant X-ray Flare of May 2005", P. Giommi, et al., A&A, 456, 911.

165. 2006 "The Multiwavelength Afterglow of GRB 050721: A Puzzling Rebrightening Seen in the Optical but not in the X-ray", L. A. Antonelli, et al., A&A, 456, 509.

164. 2006 "Swift Observations of GRB 050712", M. De Pasquale, et al., MNRAS, 370, 1859.

163. 2006 "GRB 051210: Swift Detection of a Short GRB", V. LaParola, et al., A&A, 454, 753.

162. 2006 "Swift Observations of the 2006 Outburst of the Recurrent Nova RS Ophiuchi. I. Early X-ray Emission from the Shocked Ejecta and Red Giant Wind", M. Bode, et al., ApJ, 652, 629.

161. 2006 "The Hard X-ray 20-40 keV AGN Luminosity Function", V. Beckmann, S. Soldi, C. R. Shrader, N. Gehrels & N. Produit, ApJ, 652, 126.

160. 2006 "X-ray Flares in the Early Swift Observations of the Possible Naked GRB 050421", O. Godet, et al., A&A, 452, 819.

159. 2006 "Swift and XMM Observations of the Dark GRB 050326", A. Moretti, et al., A&A, 451, 777.

158. 2006 "GRB 060313: A New Paradigm for Short-Hard Bursts", P. Roming, et al., ApJ, 651, 985.

157. 2006 "Relativistic Ejecta from X-ray Flash XRF 060218 and the Rate of Cosmic Explosions", A.M. Soderberg, et al., Nature, 442, 1014.

156. 2006 "The Association of GRB 060218 with a Supernova and the Evolution of the Shock Wave", S. Campana, et al., Nature, 442, 1008.

155. 2006 "Swift XRT Observations of the Deep Impact Collision", R. Willingale, et al., ApJ, 649, 541.

154. 2006 "X-ray flare in XRF 050406: evidence for prolonged engine activity", P. Romano, A&A, 450, 59.

153. 2006 "The First Swift X-Ray Flash: The Faint Afterglow of XRF 050215B", A. Levan, et al., ApJ, 648, 1132.

152. 2006 "GRB 050717: A Long, Short-Lag, High Peak Energy Burst Observed by Swift and Konus", H. Krimm, et al., ApJ, 648, 1117.

151. 2006 "X-Ray Observations of Type Ia Supernovae with Swift: Evidence of Circumstellar Interaction for SN 2005ke", S. Immler, et al., ApJ, 648, L119.

150. 2006 "The Early X-ray Emission from GRBs", P.T. O'Brien, et al., ApJ, 647, 1213.

149. 2006 "Swift Observations of GRB 050603: An Afterglow with a Steep Late-Time Decay Slope", D. Grupe, et al, ApJ, 645, 464.

148. 2006 "Optical Emission from GRB 050709: A Short/hard GRB in s Star Forming Galaxy", S. Covino, et al., A&A, 447, L5.

147. 2006 "Swift UVOT Observations of the X-ray Flash 050406", V. Mangano, et al., ApJ, 643, 276.

146. 2006 "Evidence for a Canonical Gamma-Ray Burst Afterglow Light Curve in the Swift XRT Data", J. A. Nousek, et al., ApJ, 642, 389.

145. 2006 "Physical Processes Shaping Gamma-Ray Bursts X-ray Afterglow Light Curves: Theoretical Implications from the Swift X-Ray Telescope Observations", B. Zhang, et al., ApJ 642, 354.

144. 2006 "Hypernova Signatures in the Late Rebrightening of GRB 0505025A", M. Della Valle, et al., ApJ, 642, L103.

143. 2006 "The Giant X-ray Flare of GRB 050502B: Evidence for Late-Time Internal Engine Activity", A. Falcone, et al., ApJ, 641, 1010

142. 2006 "The Dust Scattered X-ray Halo Around Swift GRB 050724", S. Vaughn, et al., ApJ, 639, 323.

141. 2006 "Swift XRT Observations of the Afterglow of GRB 050319", G. Cusumano, et al., ApJ, 639, 316.

140. 2006 "Prompt Optical Observations of GRB 050319 with the Swift UVOT", K. Mason, et al., ApJ, 639, 311

139. 2006 "Huge Explosion in the Early Universe", G. Cusumano, et al., Nature, 440, 164.

138. 2006 "A Photometric Redshift of z=6.39 for GRB 050904", J. Haislip, et al., Nature, 440, 181.

137. 2006 "The Anomalous Early Afterglow of GRB 050801", E. Rykoff, et al., ApJ, 638, L5.

136. 2006 "Swift XRT Observations of GRB 050319", G. Cusumano, et al., ApJ, 639, 316.

135. 2006 "GRB 050505: A High Redshift Burst Discovered by Swift", C. Hurkett, et al., MNRAS, 368, 1101.

134. 2006 "GRB 050117: Gamma Ray and X-ray Observations with the Swift Satellite", J. Hill, et al., ApJ, 639, 303.

133. 2006 "Swift Observations of the X-ray Bright GRB 050315", S. Vaughan, ApJ, 638, 920.

132. 2006 "GRB 050911: A Black Hole-Neutron Star Merger of a Naked GRB", K. Page, ApJ, 637, L13

131. 2006 "Swift Panchromatic Observations of the Bright Gamma Ray Burst GRB 050525A", A. Blustin, et al., ApJ, 637, 901.

130. 2006 "Confirmation of the Epeak-Eiso (Amati) Relation from XRF 050416A Observed by the Swift BAT", T. Sakamoto, L. Barbier, S. Barthelmy, J. Cummings, E. Fenimore, N. Gehrels, D. Hullinger, H. Krimm, C. Markwardt, D. Palmer, A. Parsons, G. Sato, & J. Tueller, ApJ, 636, L73.

129. 2006 "Spectral Evolution of the 2005 Outburst of GRO J1655-40 as Observed by Swift", C. Brocksopp, C., et al., MNRAS, 365, 1203.

128. 2005 "Development of Ground-Testable Phase Fresnel Lenses in Silicon", J. Krizmanic, B. Morgan, R. Streitmatter, N. Gehrels, K. Gendreau, Z. Arzoumanian, R. Ghodssi & G. Skinner, Exp. Astron., 20, 299.

127. 2005 "Formation Flying for a Fresnel Lens Observatory Mission", J. Krizmanic, G. Skinner & N. Gehrels, Exp Astron, 20, 497.

126. 2005 "The Swift/BAT High-Latitude Survey: First Results", C. Markwardt, J. Tueller, G. Skinner, N. Gehrels, S. Barthelmy, & R. Mushotzky, ApJ, 633, L77.

125. 2005 "An Origin for Short GRBs Unassociated with Current Start Formation", S. Barthelmy, et al., Nature, 438, 994.

124. 2005 "GRB 050904 at Redshift 6.3: Observations of the Oldest Cosmic Explosion after the Big Bang", G. Tagliaferri, et al., A&A, 443, L1.

123. 2005 "Bright X-ray Flares in XRF 050406 and GRB 050502B Provide Evidence of Extended Central Engine Activity", D. Burrows, et al., Science, 309, 1833.

122. 2005 "VLBA Imaging Polarimetry of Active Galactic Nuclei - An Automated Approach", G. Taylor, C. Fassnacht, L. Sjouwerman, S. Myers, J. Ulvestand, R. Walker, E. Fomalout, T. Pearson, A. Reahead, N. Gehrels & P. Michelson, ApJ Supp, 159, 27

121. 2005 "Swift XRT Observations of the Breaking X-ray Afterglow of GRB 050318", M. Perri, et al., A&A, 442, L1.

120. 2005 "The High Energy Spectrum of NGC 4151" V. Beckmann, N. Gehrels, C. Shrader, S. Soldi, P. Lubinski, A. Zdziarski, P. Petrucci, & J. Malzac, ApJ, 634, 939.

119. 2005 "Ultraviolet, Optical and X-Ray Observations of the Type Ia Supernova 2005am with Swift", P. Brown, et al., ApJ, 635, 1192.

118. 2005 "Discovery of an Afterglow Extension of the Prompt Phase of Two Gamma Ray Bursts Observed by Swift", S. Barthelmy, et al., ApJL, 635, L133.

117. 2005 "Swift UVOT Detection of GRB 050318, M. Still, et al., ApJ, 635, 1187.

116. 2005 "Is the INTEGRAL IBIS Source IGR J17204-3554 a Gamma-Ray Emitting Galaxy Hidden Behind the Molecular Cloud NGC 6334?", L. Bassani, et al., ApJ, 634, L21.

115. 2005, "GRB 050223: A Faint Gamma-Ray Burst Discovered by Swift", K. Page, E. Rol, A. Levan, B. Zhang, J. Osborne, A. Beardmore, D. Burrows, J. Cummings, N. Gehrels, M. Goad, O. Godet, P. O'Brien, MNRAS, 363, 76P.

114. 2005, "An Unexpected Rapid Decline in the X-ray Afterglow Emission of Long Gamma-Ray Bursts", G. Tagliaferri, et al., Nature, 436, 985.

113. 2005, "Prompt Optical Detection of GRB 050401 with ROTSE-IIIA", E. Rykoff, et al., ApJ 631, L121.

112. 2005, "Swift, INTEGRAL, RXTE & Spitzer Reveal IGR J16283-4838", V. Beckmann, et al., ApJ, 631, 506.

111. 2005, "Swift and Optical Observation of GRB 050401", M. De Pasquale, et al., MNRAS, 365, 1031.

110. 2005, "Swift, INTEGRAL, RXTE & Spizer Reveal IGR J16283-4838", V. Beckmann, J. Kennea, C. Markwardt, A. Paizis, S. Soldi, J. Rodriguez, S. Barthelmy, D. Burrows, M. Chester, N. Gehrels, N. Mowlavi, & J. Nousek, ApJ, 621, 506.

109. 2005, "A Short Gamma Ray Burst Apparently Associated with an Elliptical Galaxy at Redshift z=0.225", N. Gehrels, et al., Nature, 437, 851.

108. 2005, "Gamma-Ray Bursts and the Earth: Exploration of Atmospheric Biological, Climactic and Biogeochemical Effects", B. Thomas, A. Melott, C. Jackman, C. Laird, M. Medvedev, R. Stolarski, N. Gehrels, J. Cannizzo, D. Hogan, & L. Ejzak, ApJ, 634, 509.

107. 2005, "The Burst Alert Telescope on the Swift MIDEX Mission", S. Barthelmy, et al., Sp. Sci. Rev. , 120, 143.

106. 2005, "Swift Observations of GRB 050128: The Early X-ray Afterglow", S. Campana, et al., ApJL, 625, L23.

105. 2005, "A Contemporaneous Infrared Flash Associated with an Exceptionally Long and Bright Gamma-Ray Burst", C. Blake, et al., Nature, 435, 181.

104. 2005, "Evidence for Correlated Variability of Prompt Optical and Gamma Ray Emission in GRB 041219", W. Vestrand, P. Wozniak, J. Wren, E. Fenimore, T. Sakamoto, R. White, D. Casperson, H. Davis, S. Evans, M. Galassi, K. McGowan, J. Schier, J. Asa, S. Barthelmy, J. Cummings, N. Gehrels, D. Hullinger, H. Krimm, C. Markwardt, K. McLean, D. Palmer, A. Parsons, & J. Tueller, Nature, 435, 178.

103. 2005, "The Discovery of the Optical and Near-IR Afterglows of the First Swift Gamma Ray Bursts", E. Berger, D. Fox, S. Kulkarni, W. Krzeminski, A. Soderberg, D. Frail, D. Burrows, S. Cenko, E. Murphy, P. Price, A Gal-Yam, D. Moon, N. Gehrels, W. Freedman, E. Persson, S. Barthelmy, J. Hill, J. Nousek, & A. Moret, ApJ, 629, 328.

102. 2005, "An Expanding Radio Nebula Produced by a Giant Flare from the Magnetar SGR 1806-20", B. Gaensler, C. Kouveliotou, J. Gelfand, G. Taylor, D. Eichler, R. Wijers, J. Granot, E. Ramirez-Ruiz, Y. Lyubarsky, R. Hunstead, D. Campbell-Wilson, A. van der Horst, M. McLaughlin, R. Fender, M. Garrett, K. Newton-McGee, D. Palmer, H. Gehrels, & P. Woods, Nature, 434, 1109.

101. 2005, "Swift Detection of a Giant Flare from Magnetar SGR 1806-20", D. Palmer, S. Barthelmy, N. Gehrels, M. Kippen, T. Cayton, C. Kouveliotou, D. Eichler, R. Wijers, P. Woods, J. Granot, Y. Lyubarsky, E. Ramirez-Ruiz, L. Barvier, M. Chester, J. Cummings, E. Fenimore, M. Finger, B. Gaensler, D. Hullinger, H. Krimm, B. Markwardt, J. Nousek, S. Patel, A. Parsons, T. Sakamoto, G. Sato, M. Suzuki, & J. Tueller, Nature, 434, 1107.

100. 2005, "Terrestrial Ozone Depletion Due to a Milkyway Gamma Ray Burst", B. Thomas, C. Jackman, A. Melott, C. Laird, R. Stolarski, N. Gehrels, J. Cannizzo, & D. Hogan, ApJ, accepted.

99. 2005, "Swift XRT and VLT Observations of the Afterglow of GRB 041223", D. Burows, et al., ApJL, 662, L85.

98. 2004, "The Swift Gamma Ray Burst Mission", N. Gehrels, New Astron Rev, 48, 431.

97. 2004, "Did a Gamma Ray Burst Initiate the Late Ordovician Mass extinction?", A. Melott, B. Lieberman, C. Laird, L. Martin, M. Medvedev, B. Thomas, J. Cannizzo, N. Gehrels, & C. Jackman, International Journal of Astrobiology, 3, 55.

96. 2004, "INTEGRAL and XMM-Newton Spectral Studies of NGC 4388", V. Beckmann, N. Gehrels, P. Favre, R. Walter, T. Courvoisier, P. Petrucci, & J. Malzac, ApJ, 614, 641.

95. 2004, "INTEGRAL Observations of 3EG J1736-2908", G. Di Cocco, L. Foschini, P. Grandi, G. Malaguti, A. Castro-Tirado, S. Chaty, A. Dean, N. Gehrels, I. Grenier, W. Hermsen, L. Kuiper, N. Lund, & F. Mirabel, A&A, 425, 89.

94. 2004, "The Swift Gamma Ray Burst Mission", N. Gehrels, et al., ApJ, 611, 1005.

93. 2004, "A Numerical Gamma-Ray Burst Simulation Using Three-Dimensional Relativistic Hydrodynamics: The Transition from Spherical to Jet-Like Expansion". J. Cannizzo, N. Gehrels & E. Vishniac, ApJ, 601, 380.

92. 2003, "First SPI/INTEGRAL Measurements of Galactic 511 keV Line Emission from Positron Annihilation", P. Jean, J. Knoedlseder, V. Lonjou, M. Allain, J.-P. Roques, G. Skinner, G. Vedrenne, P. von Ballmoos, B. Teegarden, V. Schoenfelder, N. Gehrels, C. Winkler, P. Ubertini, G. Weidenspointner, and Ph. Durouchoux, A&A., 407, L55.

91. 2003, "The INTEGRAL Mission", C. Winkler, T. Courvoisier, G. Di Cocco, N. Gehrels, A. Gimenez, S. Grebenev, W. Hermsen, J. Mas-Hesse, F. Lebrun, N. Lund, G. Palumbo, J. Paul, J. Roques, H. Schnopper, V. Schoenfelder, R. Sunyaev, B. Teegarden, P. Ubertini, G. Vedrenne and A. Dean, A&A, 411, L1.

90. 2003, "First Results from the INTEGRAL Galactic Plane Scans", C. Winkler, N. Gehrels. N. Lund, V. Schoenfelder, J.P. Roques, A. Strong, P. Ubertini, J. Wetergaard, V. Beckmann, and P. Kretschmar, A&A., 411, L349.

89. 2003, "Ozone Depletion from Nearby Supernovae", N. Gehrels, et al., ApJ., 585, 1169.

84. 2000, "New Population of Galactic High Energy Gamma Ray Sources", N. Gehrels, D. Macomb, D. Bertsch, D. Thompson, and R. Hartman, Nature, 404, 363.

83. 1999, "Io Encounters Past and Present: A Heavy Ion Comparison", C. Cohen, T. Garrard, E. Stone, J. Cooper, N. Murphy, and N. Gehrels, JGR, 105, 7775.

80. 1999, "A Gamma-Ray Flare from PKS 2255-282", D. Macomb, N. Gehrels and C. Shrader, ApJ, 513, 652.

77. 1999, "GLAST: The Next-Generation High Energy Gamma-Ray Astronomy Mission", N. Gehrels and P. Michelson, Astroparticle Phys., 11, 277.

76. 1999, "The Progenitor of the New COMPTEL/ROSAT Supernova Remnant in Vela", W. Chen and N. Gehrels, ApJ 514, L103.

75. 1999, "A General Gamma-Ray Source Catalog", D. Macomb and N. Gehrels, ApJ. Supp., 120, 335.

71. 1998, "Multi-Year BATSE Earth Occultation Monitoring for NGC 4151", A. Parsons, N. Gehrels, W. Paciesas, B. A. Harmon, G. Fishman, C. Wilson, and S. N. Zhang, ApJ, 501, 608.

70. 1997, "TGRS Observation of the Bright Gamma Ray Burst GRB950822", H. Seifert. B. Teegarden, T. Cline, N. Gehrels, J. in't Zand, D. Palmer, R. Ramaty, K. Hurley, N. Madden and R. Pehl, ApJ, 491, 697.

62. 1997, "Use of nuFnu Spectral Energy Distributions for Multiwavelength Astronomy", N. Gehrels, Il Nuovo Cimento, 112B, 11.

57. 1996, "On the Spiral Arm Interpretation of COMPTEL 26Al Map Features", W. Chen, N. Gehrels, R. Diehl, and D. Hartmann, A&A Supp, 120, C315.

45. 1995, "Hard X-ray and Gamma-Ray Imaging with Solid State Detectors", N. Gehrels, Experimental Aston., 6, 129.

42. 1995, "Two Classes of Gamma-Ray Emitting Active Galactic Nuclei", C. Dermer and N. Gehrels, ApJ, 447, 103.

37. 1995, "Understanding the COMPTEL 1.8 MeV 26Al Map Features, W. Chen, N. Gehrels and R. Diehl, ApJ, 440, L57

31. 1993, "The Geminga Supernova as a Possible Cause of the Local Interstellar Bubble", N. Gehrels and W. Chen, Nature 361, 706.

30. 1993, "Temperatures of Enhanced Stability in Hot Thin Plasmas", N. Gehrels and E. D. Williams, ApJ, 418, L25.

29. 1993, "The Compton Gamma Ray Observatory", N. Gehrels, E. Chipman and D. A. Kniffen, ApJ Supp, 92, 351.

27. 1993, "The Secondary Maxima in Black Hole X-ray Nova Light Curves: Clues Toward a Complete Picture", W. Chen, M. Livio and N. Gehrels, ApJ, 408, L5.

26. 1993, "Gamma Ray Observations of the Galactic Center: Removing the Ridge Contribution", N. Gehrels and J. Tueller, ApJ,. 407, 597.

24. 1993, "Interpretation of the Narrow Positron Annihilation Feature from X-ray Nova Muscae 1991", W. Chen, N. Gehrels and F. H. Cheng, ApJ, 403, L71.

22. 1992, "Instrumental Background in Gamma-Ray Spectrometers Flown in Low Earth Orbit", N. Gehrels, NIM, A313, 513.

19. 1991, "GRIS Observations of Positron Annihilation Radiation from the Galactic Center", N. Gehrels,et al., ApJ, 375, L13.

16. 1990, "Isotopically Enriched Germanium Detectors for Astrophysical Gamma-Ray Spectroscopy", N. Gehrels, NIM, A292, 505.

11. 1987, "Prospects for Gamma Ray Observations of SN 1987A", N. Gehrels, C. MacCallum, and M. Leventhal, ApJ, 320, L19.

10. 1987, "Prospects for Gamma Ray Line Observations of Individual Supernovae", N. Gehrels, M. Leventhal, and C. MacCallum, ApJ,. 322, 215.

9. 1986, "Confidence Limits for Small Numbers of Events in Astrophysical Data", N. Gehrels, ApJ, 303, 336.

8. 1985, "Instrumental Background in Balloon-Borne Gamma-Ray Spectrometers and Techniques for Its Reduction", N. Gehrels, NIM, A239, 324.

5. 1983, "Energetic Oxygen and Sulfur in the Jovian Magnetosphere and Its Contribution to the Auroral Excitation", N. Gehrels and E. C. Stone, JGR, 88, 5537.

1. 1978, "Minor Planets and Related Objects. XXVI. Magnitudes for the Numbered Asteroids", T. Gehrels and N. Gehrels, Astron. J. 83, 1660.

Neil Gehrels (also known as Cornelis A. Gehrels)