1.3k citations · 30.6k across the 387 of their papers we have counts for
25 papers · 1 filter
Search for transitions between states in redbacks and black widows using seven years of Fermi-LAT observations
Diego F. Torres, Long Ji, Jian Li +4
Considering about seven years of Fermi-Large Area Telescope (LAT) data, we present a systematic search for variability possibly related to transitions between states in redbacks an…
A rotationally-powered magnetar nebula around Swift J1834.9-0846
Diego F. Torres
A wind nebula, generating extended X-ray emission, was recently detected surrounding Swift J1834.9-0846. This is the first magnetar for which such a wind nebula was found. Here, we…
The second catalog of flaring gamma-ray sources from the Fermi All-sky Variability Analysis
S. Abdollahi, M. Ackermann, M. Ajello +124
We present the second catalog of flaring gamma-ray sources (2FAV) detected with the Fermi All-sky Variability Analysis (FAVA), a tool that blindly searches for transients over the…
Observations of Sagittarius A* during the pericenter passage of the G2 object with MAGIC
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +153
Context. We present the results of a multi-year monitoring campaign of the Galactic Center (GC) with the MAGIC telescopes. These observations were primarily motivated by reports th…
A search for spectral hysteresis and energy-dependent time lags from X-ray and TeV gamma-ray observations of Mrk 421
A. U. Abeysekara, S. Archambault, A. Archer +220
Blazars are variable emitters across all wavelengths over a wide range of timescales, from months down to minutes. It is therefore essential to observe blazars simultaneously at di…
Very High-Energy Gamma-Ray Follow-Up Program Using Neutrino Triggers from IceCube
IceCube Collaboration, M. G. Aartsen, K. Abraham +537
We describe and report the status of a neutrino-triggered program in IceCube that generates real-time alerts for gamma-ray follow-up observations by atmospheric-Cherenkov telescope…
Detection of very high energy gamma-ray emission from the gravitationally-lensed blazar QSO B0218+357 with the MAGIC telescopes
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +151
Context. QSO B0218+357 is a gravitationally lensed blazar located at a redshift of 0.944. The gravitational lensing splits the emitted radiation into two components, spatially indi…
The 2015 outburst of the accreting millisecond pulsar IGR J17511-3057 as seen by INTEGRAL, Swift and XMM-Newton
A. Papitto, E. Bozzo, C. Sanchez-Fernandez +5
We report on INTEGRAL, Swift and XMM-Newton observations of IGR J17511-3057 performed during the outburst that occurred between March 23 and April 25, 2015. The source reached a pe…
Search for gamma-ray emission from AE Aquarii with seven years of FERMI-LAT observations
Jian Li, Diego F. Torres, Nanda Rea +4
AE Aquarii (AE Aqr) is a cataclysmic binary hosting one of the fastest rotating (P = 33.08 s) white dwarfs known. Based on seven years of Fermi Large Area Telescope (L…
Gamma-ray emission from PSR J0007+7303 using 7 years of Fermi Large Area Telescope observations
Jian Li, Diego F. Torres, Emma de Ona Wilhelmi +2
Based on more than seven years of Fermi Large Area Telescope (LAT) Pass 8 data, we report on a detailed analysis of the bright gamma-ray pulsar (PSR) J0007+7303. We confirm that PS…
Gamma-ray upper limits on magnetars with 6 years of Fermi-LAT observations
Jian Li, Nanda Rea, Diego F. Torres +1
We report on the search for gamma-ray emission from 20 magnetars using 6 years of Fermi, Large Area Telescope (LAT) observations. No significant evidence for gamma-ray emission fro…
A physical scenario for the high and low X-ray luminosity states in the transitional pulsar PSR J1023+0038
S. Campana, F. Coti Zelati, A. Papitto +4
PSR J1023+0038 (J1023) is a binary system hosting a neutron star and a low mass companion. J1023 is the best studied transitional pulsar, alternating a faint eclipsing millisecond…
Observations of three young gamma-ray pulsars with the Gran Telescopio Canarias
R. P. Mignani, N. Rea, V. Testa +6
We report the analysis of the first deep optical observations of three isolated -ray pulsars detected by the {\em Fermi Gamma-ray Space Telescope}: the radio-loud PSR\, J0248+60…
Searching the Gamma-ray Sky for Counterparts to Gravitational Wave Sources: Fermi GBM and LAT Observations of LVT151012 and GW151226
J. L. Racusin, E. Burns, A. Goldstein +138
We present the Fermi Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) observations of the LIGO binary black hole merger event GW151226 and candi- date LVT151012. No can…
Long-term multi-wavelength variability and correlation study of Markarian 421 from 2007 to 2009
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +176
We study the multi-band variability and correlations of the TeV blazar Mrk 421 on year time scales, which can bring additional insight on the processes responsible for its broadban…
Minute-Timescale >100 MeV gamma-ray variability during the giant outburst of quasar 3C 279 observed by Fermi-LAT in 2015 June
LAT Collaboration
On 2015 June 16, Fermi-LAT observed a giant outburst from the flat spectrum radio quasar 3C 279 with a peak MeV flux of $\sim3.6\times10^{-5}\;{\rm photons}\;{\rm cm}^{-2}\;…
Fermi LAT Stacking Analysis of Swift Localized Gamma-ray Bursts
LAT Collaboration
We perform a comprehensive stacking analysis of data collected by the Fermi Large Area Telescope (LAT) of gamma-ray bursts (GRB) localized by the Swift spacecraft, which were not d…
Super-orbital variability of LS I +61°303 at TeV energies
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +150
The gamma-ray binary LS I +61303 is a well established source from centimeter radio up to very high energy (VHE; E100 GeV). Its broadband emission shows a periodicity…
Molecular environment, reverberation, and radiation from the pulsar wind nebula in CTA 1
Jonatan Martín, Diego F. Torres, Giovanna Pedaletti
We estimate the molecular mass around CTA 1 using data from Planck and the Harvard CO survey. We observe that the molecular mass in the vicinity of the complex is not enough to exp…
Insights into the emission of the blazar 1ES 1011+496 through unprecedented broadband observations during 2011 and 2012
J. Aleksić, S. Ansoldi, L. A. Antonelli +161
1ES 1011+496 was discovered in very high energy (VHE, E >100 GeV) -rays with MAGIC in 2007. The absence of simultaneous data at lower energies led to a rather incomp…
Development of the Model of Galactic Interstellar Emission for Standard Point-Source Analysis of Fermi Large Area Telescope Data
F. Acero, M. Ackermann, M. Ajello +131
Most of the celestial gamma rays detected by the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope originate from the interstellar medium when energetic cosmic…
Fermi-LAT Observations of the LIGO event GW150914
LAT collaboration
The Fermi Large Area Telescope (LAT) has an instantaneous field of view covering of the sky and completes a survey of the full sky every ~3 hours. It provides a continuo…
Limits to dark matter annihilation cross-section from a combined analysis of MAGIC and Fermi-LAT observations of dwarf satellite galaxies
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +154
We present the first joint analysis of gamma-ray data from the MAGIC Cherenkov telescopes and the Fermi Large Area Telescope (LAT) to search for gamma-ray signals from dark matter…
Contemporaneous broadband observations of three high-redshift BL Lac Objects
LAT Collaboration
We have collected broadband spectral energy distributions (SEDs) of three BL Lac objects, 3FGL J0022.11855 (z=0.689), 3FGL J0630.92406 (z >~ 1.239), and 3FGL J0811.27529 (…