Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of California, BerkeleyUS1.3k papers
- Goddard Space Flight CenterUS1.3k papers
- California Institute of TechnologyUS1.3k papers
- The Ohio State UniversityUS1.2k papers
- Centre National de la Recherche ScientifiqueFR1.1k papers
- Massachusetts Institute of TechnologyUS1.1k papers
- University of Maryland, College ParkUS1k papers
- Center for Astrophysics Harvard & SmithsonianUS975 papers
- Lawrence Berkeley National LaboratoryUS898 papers
- University of ChicagoUS889 papers
- University of WashingtonUS868 papers
- Yale UniversityUS848 papers
81 papers · 2 filters
The Optical Afterglow and z=0.92 Early-type Host Galaxy of the Short GRB 100117A
Wen-fai Fong, Edo Berger, Ryan Chornock +6
We present the discovery of the optical afterglow and early-type host galaxy of the short-duration GRB 100117A. The faint afterglow is detected 8.3 hr after the burst with r_AB = 2…
Spectral Energy Distribution of Markarian 501: Quiescent State vs. Extreme Outburst
The VERITAS Collaboration, V. A. Acciari, T. Arlen +225
The very high energy (VHE; E > 100 GeV) blazar Markarian 501 has a well-studied history of extreme spectral variability and is an excellent laboratory for studying the physical pro…
Time-Integrated Searches for Point-like Sources of Neutrinos with the 40-String IceCube Detector
The IceCube Collaboration, R. Abbasi
We present the results of time-integrated searches for astrophysical neutrino sources in both the northern and southern skies. Data were collected using the partially-completed Ice…
Ultraviolet and X-ray Variability of the Seyfert 1.5 Galaxy Markarian 817
Lisa M. Winter, Charles Danforth, Ranjan Vasudevan +9
We present an investigation of the ultraviolet and X-ray spectra of the Seyfert 1.5 galaxy Markarian 817. The ultraviolet analysis includes two recent observations taken with the C…
Confirmation of the Supergiant Fast X-ray Transient nature of AX J1841.0-0536 from Swift outburst observations
P. Romano, V. Mangano, G. Cusumano +8
Swift observed an outburst from the supergiant fast X-ray transients (SFXT) AX J1841.0-0536 on 2010 June 5, and followed it with XRT for 11 days. The X-ray light curve shows an ini…
Detection of a Thermal Spectral Component in the Prompt Emission of GRB 100724B
Sylvain Guiriec, Valerie Connaughton, Michael S. Briggs +29
Observations of GRB 100724B with the Fermi Gamma-Ray Burst Monitor (GBM) find that the spectrum is dominated by the typical Band functional form, which is usually taken to represen…
The Super-Soft X-ray Phase of Nova RS Ophiuchi 2006
J. P. Osborne, K. L. Page, A. P. Beardmore +13
Swift X-ray observations of the ~60 day super-soft phase of the recurrent nova RS Ophiuchi 2006 show the progress of nuclear burning on the white dwarf in exquisite detail. First s…
Insights Into the High-Energy Gamma-ray Emission of Markarian 501 from Extensive Multifrequency Observations in the Fermi Era
LAT collaboration, A. A. Abdo et al., the MAGIC collaboration +6
We report on the gamma-ray activity of the blazar Mrk 501 during the first 480 days of Fermi operation. We find that the average LAT gamma-ray spectrum of Mrk 501 can be well descr…
Search for a Lorentz-violating sidereal signal with atmospheric neutrinos in IceCube
IceCube Collaboration, R. Abbasi, Y. Abdou +258
A search for sidereal modulation in the flux of atmospheric muon neutrinos in IceCube was performed. Such a signal could be an indication of Lorentz-violating physics. Neutrino osc…
Photometric redshifts for GRB afterglows from GROND and Swift/UVOT
T. Krühler, P. Schady, J. Greiner +18
We present a framework to obtain photometric redshifts (photo-zs) for gamma-ray burst afterglows. Using multi-band photometry from GROND and Swift/UVOT, photo-zs are derived for fi…
Multi-wavelength Observations of the Flaring Gamma-ray Blazar 3C 66A in 2008 October
LAT collaboration, A. A. Abdo et al., the VERITAS collaboration +4
The BL Lacertae object 3C 66A was detected in a flaring state by the Fermi Large Area Telescope (LAT) and VERITAS in 2008 October. In addition to these gamma-ray observations, F-GA…
Chandra Observations of the High-Magnetic-Field Radio Pulsar J1718-3718
W. W. Zhu, V. M. Kaspi, M. A. McLaughlin +5
High-magnetic-field pulsars represent an important class of objects for studying the relationship between magnetars and radio pulsars. Here we report on four Chandra observations o…
Search for Gravitational Wave Bursts from Six Magnetars
J. Abadie, B. P. Abbott, R. Abbott +765
Soft gamma repeaters (SGRs) and anomalous X-ray pulsars (AXPs) are thought to be magnetars: neutron stars powered by extreme magnetic fields. These rare objects are characterized b…
On the Implications of Late Internal Dissipation for Shallow-Decay Afterglow Emission and Associated High-Energy Gamma-Ray Signals
Kohta Murase, Kenji Toma, Ryo Yamazaki +1
The origin of the shallow-decay emission during early X-ray afterglows has been an open issue since the launch of the Swift satellite. One of the appealing models is the late inter…
A Statistical Comparison of the Optical/UV and X-ray Afterglows of Gamma-Ray Bursts using the Swift Ultra-violet Optical and X-ray Telescopes
S. R. Oates, M. J. Page, P. Schady +11
We present the systematic analysis of the UVOT and XRT light curves for a sample of 26 Swift Gamma-Ray Bursts (GRBs). By comparing the optical/UV and X-ray light curves, we found t…
The quasar PG 0844+349 in an X-ray weak state
L. C. Gallo, D. Grupe, N. Schartel +4
In March 2009 the well-studied quasar, PG 0844+349, was discovered with Swift to be in an X-ray weak state. A follow-up XMM-Newton observation several weeks later generated a good…
The first gamma-ray outburst of a Narrow-Line Seyfert 1 Galaxy: the case of PMN J0948+0022 in July 2010
L. Foschini, G. Ghisellini, Y. Y. Kovalev +24
We report on a multiwavelength campaign on the radio-loud Narrow-Line Seyfert 1 (NLS1) Galaxy PMN J0948+0022 (z=0.5846) performed in 2010 July-September and triggered by a high-ene…
Measurement of the atmospheric neutrino energy spectrum from 100 GeV to 400 TeV with IceCube
IceCube Collaboration, R. Abbasi, Y. Abdou +258
A measurement of the atmospheric muon neutrino energy spectrum from 100 GeV to 400 TeV was performed using a data sample of about 18,000 up-going atmospheric muon neutrino events i…
Prompt X-ray and Optical Excess Emission due to Hadronic Cascades in Gamma-Ray Bursts
Katsuaki Asano, Susumu Inoue, Peter Meszaros
A fraction of gamma-ray bursts exhibit distinct spectral features in their prompt emission below few 10s of keV that exceed simple extrapolations of the low-energy power-law portio…
Searching for compact objects in SNRs G27.8+0.6 and G28.8+1.5
Zdenka Misanovic, Oleg Kargaltsev, George G. Pavlov
We analyzed XMM-Newton observations of two center-filled supernova remnants, G27.8+0.6 and G28.8+1.5, to search for pulsars/pulsar wind nebulae (PWNe) and other types of neutron st…
On Relativistic Disk Spectroscopy in Compact Objects with X-ray CCD Cameras
J. M. Miller, A. D'Ai, M. W. Bautz +11
X-ray charge-coupled devices (CCDs) are the workhorse detectors of modern X-ray astronomy. Typically covering the 0.3-10.0 keV energy range, CCDs are able to detect photoelectric a…
Two years of monitoring Supergiant Fast X-ray Transients with Swift
P. Romano, V. La Parola, S. Vercellone +10
We present two years of intense Swift monitoring of three SFXTs, IGR J16479-4514, XTE J1739-302, and IGR J17544-2619 (since October 2007). Out-of-outburst intensity-based X-ray (0.…
Relativistic jets in Narrow-Line Seyfert 1
L. Foschini, E. Angelakis, G. Bonnoli +20
Narrow-Line Seyfert 1 (NLS1) class of active galactic nuclei (AGNs) is generally radio-quiet, but a small percent of them are radio-loud. The recent discovery by Fermi/LAT of high-…
A Tidal Disruption Flare in Abell 1689 from an Archival X-ray Survey of Galaxy Clusters
Peter Maksym, Melville P. Ulmer, Michael Eracleous
Theory suggests that a star making a close passage by a supermassive black hole at the center of a galaxy can under most circumstances be expected to emit a giant flare of radiatio…