Publications (124)
Optical/IR counterpart to the resolved X-ray jet source CXO J172337.5-373442 and its distance
Bhaswati Mookerjea, Pietro Parisi, Sudip Bhattacharyya +3
We present results of observations in the optical to mid-infrared wavelengths of the X-ray source CXO J172337.5-373442, which was serendipitously discovered in the Chandra images a…
GRB 091127: The cooling break race on magnetic fuel
Robert Filgas, Jochen Greiner, Patricia Schady +13
Using high-quality, broad-band afterglow data for GRB 091127, we investigate the validity of the synchrotron fireball model for gamma-ray bursts, and infer physical parameters of t…
Weather on the Nearest Brown Dwarfs: Resolved Simultaneous Multi-Wavelength Variability Monitoring of WISE J104915.57-531906.1AB
Beth A. Biller, Ian J. M. Crossfield, Luigi Mancini +15
We present two epochs of MPG/ESO 2.2m GROND simultaneous 6-band () photometric monitoring of the closest known L/T transition brown dwarf binary WISE J104915.57-531906.1…
Multifrequency Observations of the Galactic Microquasars GRS1915+105 and GROJ1655-40
Ronald A. Remillard, Edward H. Morgan, Jeffrey E. McClintock +3
The two galactic `microquasars' with superluminal radio jets have been quite active during 1996, generatinga variety of studies involving both NASA and ground-based observatories.…
Al gamma rays from the Galaxy with INTEGRAL/SPI
Moritz M. M. Pleintinger, Roland Diehl, Thomas Siegert +2
The presence of radioactive Al at 1.8 MeV reflects ongoing nucleosynthesis in the Milky Way. Diffuse emission from its decay can be measured with gamma-ray telescopes in spa…
The ULIRG NGC 6240: Luminous extended X-ray emission and evidence for an AGN
Hartmut Schulz, Stefanie Komossa, Jochen Greiner
We briefly review and extend our discussion of the ROSAT detection of the extraordinarily luminous (>10^{42} erg/s) partly extended (> 30 kpc diameter) X-ray emission from the doub…
Positron annihilation signatures associated with the outburst of the microquasar V404 Cygni
Thomas Siegert, Roland Diehl, Jochen Greiner +7
Microquasars are stellar-mass black holes accreting matter from a companion star and ejecting plasma jets at almost the speed of light. They are analogues of quasars that contain s…
New high-z BL Lacs using the photometric method with Swift and SARA
Amanpreet Kaur, Arne Rau, Marco Ajello +5
BL Lacertae (BL Lac) objects are the prominent members of the third {\it Fermi} Large Area Telescope catalog of -ray sources. Half of the BL Lac population ( 300) lack re…
Revisiting INTEGRAL/SPI observations of 44Ti from Cassiopeia A
Thomas Siegert, Roland Diehl, Martin G. H. Krause +1
The 340-year old supernova remnant Cassiopeia A at 3.4 kpc distance is the best-studied young core-collapse supernova remnant. Nucleosynthesis yields in radioactive isotopes have b…
GRB 060605: multi-wavelength analysis of the first GRB observed using integral field spectroscopy
Patrizia Ferrero, Sylvio Klose, David Alexander Kann +16
The long and relatively faint gamma-ray burst GRB 060605 detected by \emph{Swift}/BAT lasted about 20 sec. Its afterglow could be observed with \emph{Swift}/XRT for nearly 1 day, w…
Clustering of galaxies around GRB sight-lines
Vladimir Sudilovsky, Jochen Greiner, Arne Rau +11
There is evidence of an overdensity of strong intervening MgII absorption line systems distributed along the lines of sight towards GRB afterglows relative to quasar sight-lines. I…
Gamma-Ray Bursts: The multiwavelength context in 2015 and beyond
Jochen Greiner, Arne Rau
We collect information as complete as possible about the upcoming telescopes and facilities relevant to gamma-ray bursts, both in the electromagnetic bands as well as for non-elect…
Multi-messenger detection prospects of gamma-ray burst afterglows with optical jumps
Ersilia Guarini, Irene Tamborra, Damien Bégué +2
Some afterglow light curves of gamma-ray bursts (GRBs) exhibit very complex temporal and spectral features, such as a sudden intensity jump about one hour after the prompt emission…
The 3rd Fermi GBM Gamma-Ray Burst Catalog: The First Six Years
P. Narayana Bhat, Charles A. Meegan, Andreas von Kienlin +30
Since its launch in 2008, the Fermi Gamma-ray Burst Monitor (GBM) has triggered and located on average approximately two gamma-ray bursts (GRB) every three days. Here we present th…
iPTF14yb: The First Discovery of a GRB Afterglow Independent of a High-Energy Trigger
S. Bradley Cenko, Alex L. Urban, Daniel A. Perley +34
We report here the discovery by the Intermediate Palomar Transient Factory (iPTF) of iPTF14yb, a luminous ( mag), cosmological (redshift 1.9733), rapidly fading…
Awakening the BALROG (BAyesian Location Reconstruction Of GRBs): A new paradigm in spectral and location analysis of gamma ray bursts
J. Michael Burgess, Hoi-Fung Yu, Jochen Greiner +1
The accurate spatial location of gamma-ray bursts (GRBs) is crucial for both producing a detector response matrix (DRM) and follow-up observations by other instruments. The Fermi G…
An Intertwined Short and Long GRB with 4-minute Separation
Liang Li, Yu Wang, Bing Zhang +19
Gamma-ray bursts (GRBs), the most energetic transients in the Universe, are traditionally classified into long-duration ( s) and short-duration ( s) events, ass…
The Fermi Gamma-Ray Burst Monitor
Charles Meegan, Giselher Lichti, P. N. Bhat +18
The Gamma-Ray Burst Monitor (GBM) will significantly augment the science return from the Fermi Observatory in the study of Gamma-Ray Bursts (GRBs). The primary objective of GBM is…
The Fermi GBM Gamma-Ray Burst Spectral Catalog: Four Years Of Data
David Gruber, Adam Goldstein, Victoria Weller von Ahlefeld +29
In this catalog we present the updated set of spectral analyses of GRBs detected by the Fermi Gamma-Ray Burst Monitor (GBM) during its first four years of operation. It contains tw…
Looking for black-holes in X-ray binaries with XMM-Newton: XTE J1817-330 and XTE J1856+053
Gloria Sala, Jochen Greiner, Natalia Primak
The X-ray binary XTE J1817-330 was discovered in outburst on 26 January 2006 with RXTE/ASM. One year later, another X-ray transient discovered in 1996, XTE J1856+053, was detected…
Old Galactic novae in the eROSITA All Sky Survey
Gloria Sala, Frank Haberl, Axel Schwope +4
Nova explosions occur on accreting white dwarfs. A thermonuclear runaway in the H-rich accreted envelope causes its ejection without destroying the white dwarf, and an increase in…
Bright radio emission from an ultraluminous stellar-mass microquasar in M31
Matthew J. Middleton, James C. A. Miller-Jones, Sera Markoff +34
A subset of ultraluminous X-ray sources (those with luminosities < 10^40 erg/s) are thought to be powered by the accretion of gas onto black holes with masses of ~5-20 M_solar, pro…
POLAR-2 -- Latest Developments of the Next Generation GRB Polarimeter
Johannes Hulsman, Philipp Azzarello, Joerg Bayer +20
Gamma-Ray Bursts (GRBs) are among the most energetic events in the Universe. Despite over 50 years of research and measurements their prompt emission remains poorly understood, wit…
Gamma-ray bursts as cool synchrotron sources
J. Michael Burgess, Damien Bégué, Ana Bacelj +3
Gamma-ray bursts are the most energetic electromagnetic sources in the Universe. Their prompt gamma-ray radiation corresponds to an energy release of 1E42-1E47J. Fifty years after…
On the X-ray properties of V Sge and its relation to the supersoft X-ray binaries
Jochen Greiner, Andre van Teeseling
We investigate the ROSAT X-ray properties of V Sge, which has been proposed to be related to supersoft X-ray binaries. During optical bright states, V Sge is a faint hard X-ray sou…
ROSAT HRI discovery of luminous extended X-ray emission in NGC 6240
Stefanie Komossa, Hartmut Schulz, Jochen Greiner
We report the detection of luminous extended X-ray emission in NGC 6240 on the basis of ROSAT HRI observations of this ultraluminous IR galaxy. The spatial structure and temporal b…
POLAR-2, the next generation of GRB polarization detector
Nicolas Produit, Merlin Kole, Xin Wu +9
The POLAR-2 Gamma-Ray Burst (GRB) Polarimetry mission is a follow-up to the successful POLAR mission. POLAR collected six months of data in 2016-2017 on board the Tiangong-2 Chines…
Gamma-ray spectroscopy of galactic nucleosynthesis
Roland Diehl, Jochen Greiner, Martin Krause +2
Diffuse gamma-ray emission from the decay of radioactive Al is a messenger from the nucleosynthesis activity in our current-day galaxy. Because this material is attributed t…
Gamma-Ray Observations of Nova Sgr 2015 No. 2 with INTEGRAL
Thomas Siegert, Alain Coc, Laura Delgado +11
INTEGRAL observed the nova V5668 Sgr around the time of its optical maximum on March 21, 2015. Studies at UV wavelengths showed spectral lines of freshly produced Be-7. This could…
Calibration of the GLAST Burst Monitor detectors
Andreas von Kienlin, Elisabetta Bissaldi, Giselher G. Lichti +15
The GLAST Burst Monitor (GBM) will augment the capabilities of GLAST for the detection of cosmic gamma-ray bursts by extending the energy range (20 MeV to > 300 GeV) of the Large A…
The Optical Content of the Error Box of GRS 1915+105
Michel Boer, Jochen Greiner, Christian Motch
We report on deep photometry and spectroscopy of the objects detected in the ROSAT HRI X-ray error box of the hard X-ray transient, GRS 1915+105. The probable counterpart of this s…
Optical identification of supersoft X-ray sources in M31
Marina orio, Roberto Casalegno, Chris Conselice +3
We report on initial progress in a program of optical identification of supersoft X-ray sources in M31, pursued mainly with the WIYN telescope. We propose the identification of one…
26Al kinematics: superbubbles following the spiral arms? Constraints from the statistics of star clusters and HI supershells
Martin G. H. Krause, Roland Diehl, Yiannis Bagetakos +6
High energy resolution spectroscopy of the 1.8 MeV radioactive decay line of 26Al with the SPI instrument on board the INTEGRAL satellite has recently revealed that diffuse 26Al ha…
Design and preliminary performance study of the broad-band spectrometer detector for POLAR-2
Jian-Chao Sun, Jiang He, Shuang-Nan Zhang +46
POLAR-2, the successor of the POLAR experiment aboard China's Tiangong-2 space lab, is set to be deployed on the China Space Station. The POLAR-2 mission aims to conducting high-pr…
Follow-up observations from observatories based in Spain
Javier Gorosabel, Alberto J. Castro-Tirado, Jochen Greiner +4
We present a review of the follow-up observations carried out from observatories located in Spain; Calar-Alto, Izanha and Roque de Los Muchachos. It summarizes the observations car…
Design and Performance of a Universal SiPM Readout System for X- and Gamma-Ray Missions
Merlin Kole, Nicolas De Angelis, Nicolas Produit +15
The advent of both multi-messenger and time-domain astrophysics over the last decade has seen a large interest in the development of small-scale, cheap, and robust gamma-ray detect…
GRO J1655-40: from ASCA and XMM-Newton Observations
Xiao-Ling Zhang, Shuang Nan Zhang, Gloria Sala +3
We have analysed four ASCA observations (1994--1995, 1996--1997) and three XMM-Newton observations (2005) of this source, in all of which the source is in high/soft state. We model…
Improving INTEGRAL/SPI data analysis of GRBs
Björn Biltzinger, Jochen Greiner, J. Michael Burgess +1
INTEGRAL/SPI is a coded mask instrument observing since 2002 in the keV to MeV energy range, which covers the peak of the spectrum of most Gamma-Ray Bursts (GRBs). Since it…
Relation between supersoft X-ray sources and VY Scl stars
Jochen Greiner, Rosanne DiStefano
In a recent ROSAT observation, taken during its optical low state, we found that the VY Scl star V751 Cyg was a highly luminous source of soft X-rays. The ROSAT HRI count rate of V…
The GROND GRB sample: II. Fireball parameters for four GRB afterglows
Karla Varela, Jochen Greiner, Patricia Schady +1
Afterglows of GRBs are, in general, well described by the fireball model. Yet, deducing the full set of model parameters from observations without prior assumptions has been possib…
On the Clustering of GRBs on the Sky
Shiv K. Sethi, S. G. Bhargavi, Jochen Greiner
The two-point correlation of the 4th (current) BATSE catalog (2494 objects) is calculated. It is shown to be consistent with zero at nearly all angular scales of interest. Assuming…
INTEGRAL/SPI -ray line spectroscopy
Roland Diehl, Thomas Siegert, Jochen Greiner +7
INTEGRAL/SPI is a space-based coded mask telescope featuring a 19-element Germanium detector array for high-resolution gamma-ray spectroscopy, encapsulated in a scintillation detec…
Synchrotron Cooling in Energetic Gamma-Ray Bursts Observed by the Fermi Gamma-Ray Burst Monitor
Hoi-Fung Yu, Jochen Greiner, Hendrik van Eerten +15
We study the time-resolved spectra of eight GRBs observed by Fermi GBM in its first five years of mission, with 1 keV - 1 MeV fluence erg cm and signal-…
A very luminous magnetar-powered supernova associated with an ultra-long gamma-ray burst
Jochen Greiner, Paolo A. Mazzali, D. Alexander Kann +29
A new class of ultra-long duration (>10,000 s) gamma-ray bursts has recently been suggested. They may originate in the explosion of stars with much larger radii than normal long ga…
Comptonization, the X-ray-radio correlation and the long-term periodicity in the chi-states of GRS 1915+105
Arne Rau, Jochen Greiner
We analyzed 139 chi-state observations of GRS 1915+105 with RXTE from 1997 to 2000 and found i) that the observations fall into two groups with different Comptonization behavior, i…
Gamma-Ray Burst Polarimetry with the POLAR and POLAR-2 missions
Nicolas De Angelis, Philipp Azzarello, Franck Cadoux +15
Gamma-Ray Bursts are among the most powerful and violent events in the Universe. Despite over half a century of observations of these transient sources, many open questions remain…
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…
Anomalies in low-energy Gamma-Ray Burst spectra with the Fermi Gamma-Ray Burst Monitor
Dave Tierney, Sheila McBreen, Robert D. Preece +15
A Band function has become the standard spectral function used to describe the prompt emission spectra of gamma-ray bursts (GRBs). However, deviations from this function have previ…
PSR J1311-3430: A Heavyweight Neutron Star with a Flyweight Helium Companion
Roger W. Romani, Alexei V. Filippenko, Jeffery M. Silverman +5
We have obtained initial spectroscopic observations and additional photometry of the newly discovered Pb=94min gamma-ray black-widow pulsar PSR J1311-3430. The Keck spectra show a…
On the association of the ultraluminous X-ray sources in the Antennae galaxies with young stellar clusters
Juri Poutanen, Sergei Fabrika, Azamat F. Valeev +2
The nature of the ultra-luminous X-ray sources (ULXs) in the nearby galaxies is a matter of debates. One of the popular hypothesis associates them with accretion at a sub-Eddington…
Viewing short Gamma-ray Bursts from a different angle
J. Michael Burgess, Jochen Greiner, Damien Begue +3
The recent coincident detection of gravitational waves (GW) from a binary neutron star merger with aLIGO/Virgo and short-lived gamma-ray emission with Fermi/GBM (called GW 170817)…
The exceptional X-ray properties of the NLSy1 galaxy RXJ 0134.3-4258
Stefanie Komossa, Dieter Breitschwerdt, Jochen Greiner +1
The Narrow-line Seyfert 1 galaxy RXJ0134.3-4258 was detected during the ROSAT all-sky survey with an ultrasoft spectrum (Greiner 1996). Our later pointed observation led to the dis…
Three years of Fermi GBM Earth Occultation Monitoring: Observations of Hard X-ray/Soft Gamma-Ray Sources
P. Jenke, Colleen A. Wilson-Hodge, Gary L. Case +15
The Gamma ray Burst Monitor (GBM) on board Fermi Gamma-ray Space Telescope has been providing continuous data to the astronomical community since 2008 August 12. We will present th…
Three years of Fermi GBM Earth Occultation Monitoring: Observations of Hard X-ray/Soft Gamma-Ray Sources
Colleen A. Wilson-Hodge, Gary L. Case, Michael L. Cherry +15
The Gamma ray Burst Monitor (GBM) on board Fermi has been providing continuous data to the astronomical community since 2008 August 12. In this paper we present the results of the…
A Physical Background Model for the Fermi Gamma-ray Burst Monitor
Björn Biltzinger, Felix Kunzweiler, Jochen Greiner +2
We present the first physically motivated background model for the Gamma-Ray Burst Monitor (GBM) onboard the Fermi satellite. Such a physically motivated background model has the p…
Gamma-ray spectroscopy of Positron Annihilation in the Milky Way
Thomas Siegert, Roland Diehl, Gerasim Khachatryan +5
The annihilation of positrons in the Galaxy's interstellar medium produces characteristic gamma-rays with a line at 511 keV. This emission has been observed with the spectrometer S…
The sharpness of gamma-ray burst prompt emission spectra
Hoi-Fung Yu, Hendrik J. van Eerten, Jochen Greiner +5
We aim to obtain a measure of the curvature of time-resolved spectra that can be compared directly to theory. This tests the ability of models such as synchrotron emission to expla…
A Revised Host Galaxy Association for GRB 020819B: A High-Redshift Dusty Starburst, Not a Low-Redshift Gas-Poor Spiral
Daniel A. Perley, Thomas Krühler, Patricia Schady +8
The purported spiral host galaxy of GRB 020819B at z=0.41 has been seminal in establishing our view of the diversity of long-duration gamma-ray burst environments: optical spectros…
A Multiwavelength Study of the Relativistic Tidal Disruption Candidate Sw J2058+05 at Late Times
Dheeraj R. Pasham, S. Bradley Cenko, Andrew J. Levan +13
We report a multiwavelength (X-ray, ultraviolet/optical/infrared, radio) analysis of the relativistic tidal disruption event candidate Sw J2058+05 from 3 months to 3 yr post-discov…
A very energetic supernova associated with the gamma-ray burst of 29 March 2003
Jens Hjorth, Jesper Sollerman, Palle Møller +24
Over the past five years evidence has mounted that long-duration (> 2 s) gamma-ray bursts (GRBs)--the most brilliant of all astronomical explosions--signal the collapse of massive…
The POLAR Gamma-Ray Burst Polarization Catalog
Merlin Kole, Nicolas De Angelis, Francesco Berlato +18
Despite over 50 years of research, many open questions remain about the origin and nature of GRBs. Polarization measurements of the prompt emission of these extreme phenomena have…
Dust reddening and extinction curves towards gamma-ray bursts at z > 4
Jan Bolmer, Jochen Greiner, Thomas Krühler +4
Dust is known to be produced in the envelopes of AGB stars, the expanded shells of supernova (SN) remnants, and in situ grain growth in the ISM, although the corresponding efficien…
Probing dust-obscured star formation in the most massive Gamma-Ray Burst host galaxies
Jochen Greiner, Michal J. Michalowski, Sylvio Klose +15
Due to their relation to massive stars, long-duration gamma-ray bursts (GRBs) allow pinpointing star formation in galaxies independently of redshift, dust obscuration, or galaxy ma…
Detection of spectral evolution in the bursts emitted during the 2008-2009 active episode of SGR J1550 - 5418
Andreas von Kienlin, David Gruber, Chryssa Kouveliotou +16
In early October 2008, the Soft Gamma Repeater SGRJ1550 - 5418 (1E 1547.0 - 5408, AXJ155052 - 5418, PSR J1550 - 5418) became active, emitting a series of bursts which triggered the…
Intervening Metal Systems in GRB and QSO sight-lines: The Mgii and Civ Question
Vladimir Sudilovsky, Sandra Savaglio, Paul Vreeswijk +3
Prochter et al. 2006 recently found that the number density of strong intervening 0.5<z<2 MgII absorbers detected in gamma-ray burst (GRB) afterglow spectra is nearly 4 times large…
The Fermi GBM Gamma-Ray Burst Catalog: The First Two Years
William S. Paciesas, Charles A. Meegan, Andreas von Kienlin +26
The Fermi Gamma-ray Burst Monitor (GBM) is designed to enhance the scientific return from Fermi in studying gamma-ray bursts (GRBs). In its first two years of operation GBM trigger…
The Fermi GBM Gamma-Ray Burst Spectral Catalog: The First Two Years
Adam Goldstein, J. Michael Burgess, Robert D. Preece +25
We present systematic spectral analyses of GRBs detected by the Fermi Gamma-Ray Burst Monitor (GBM) during its first two years of operation. This catalog contains two types of spec…
The properties of the 2175AA extinction feature discovered in GRB afterglows
Tayyaba Zafar, Darach Watson, Ardis Eliasdottir +10
The unequivocal, spectroscopic detection of the 2175 bump in extinction curves outside the Local Group is rare. To date, the properties of the bump have been examined in only two G…
The deep look onto the hard X-ray sky: The Swift - INTEGRAL X-ray (SIX) survey
Eugenio Bottacini, Marco Ajello, Jochen Greiner
The super-massive black-holes in the centers of Active Galactic Nuclei (AGNs) are surrounded by obscuring matter that can block the nuclear radiation. Depending on the amount of bl…
The GLAST Burst Monitor
Andreas von Kienlin, Charles A. Meegan, Giselher G. Lichti +14
The next large NASA mission in the field of gamma-ray astronomy, GLAST, is scheduled for launch in 2007. Aside from the main instrument LAT (Large-Area Telescope), a gamma-ray tele…
Discovery of a Be/X-ray Binary Consistent with the Position of GRO J2058+42
Colleen A. Wilson, Martin C. Weisskopf, Mark H. Finger +4
GRO J2058+42 is a 195 s transient X-ray pulsar discovered in 1995 with BATSE. In 1996, RXTE located GRO J2058+42 to a 90% confidence error circle with a 4' radius. On 20 February 2…
Early 56Ni decay γ-rays from SN2014J suggest an unusual explosion
Roland Diehl, Thomas Siegert, Wolfgang Hillebrandt +7
Type-Ia supernovae result from binary systems that include a carbon-oxygen white dwarf, and these thermonuclear explosions typically produce 0.5 M_solar of radioactive 56Ni. The 56…
Ground-based calibration and characterization of the Fermi Gamma-Ray Burst Monitor Detectors
Elisabetta Bissaldi, Andreas von Kienlin, Giselher G. Lichti +18
One of the scientific objectives of NASA's Fermi Gamma-ray Space Telescope is the study of Gamma-Ray Bursts (GRBs). The Fermi Gamma-Ray Burst Monitor (GBM) was designed to detect a…
Background modelling for -ray spectroscopy with INTEGRAL/SPI
Thomas Siegert, Roland Diehl, Christoph Weinberger +3
The coded-mask spectrometer-telescope SPI on board the INTEGRAL observatory records photons in the energy range between 20 and 8000 keV. A robust and versatile method to model the…
Galactic Population Synthesis of Radioactive Nucleosynthesis Ejecta
Thomas Siegert, Moritz M. M. Pleintinger, Roland Diehl +3
Diffuse gamma-ray line emission traces freshly produced radioisotopes in the interstellar gas, providing a unique perspective on the entire Galactic cycle of matter from nucleosynt…
Kinematics of massive star ejecta in the Milky Way as traced by 26Al
Karsten Kretschmer, Roland Diehl, Martin Krause +5
Massive stars form in groups and their winds and supernova explosions create superbubbles up to kpc in size. Their ejecta are important for the dynamics of the interstellar medium…
Energy-dependent polarization of Gamma-Ray Bursts' prompt emission with the POLAR and POLAR-2 instruments
Nicolas De Angelis, J. Michael Burgess, Franck Cadoux +10
Gamma-Ray Bursts are among the most powerful events in the Universe. Despite half a century of observations of these transient sources, many open questions remain about their natur…
The Fermi GBM gamma-ray burst time-resolved spectral catalog: brightest bursts in the first four years
Hoi-Fung Yu, Robert D. Preece, Jochen Greiner +17
We aim to obtain high-quality time-resolved spectral fits of gamma-ray bursts (GRBs) observed by the Gamma-ray Burst Monitor (GBM) on board the Fermi Gamma-ray Space Telescope. We…
The Fast Evolution of SN 2010bh associated with XRF 100316D
Felipe Olivares E., Jochen Greiner, Patricia Schady +13
(...) Since 1998, only half a dozen spectroscopically confirmed associations have been discovered and XRF 100316D associated with the type-Ic SN 2010bh at z = 0.059 is among the la…
The Spectral Sharpness Angle of Gamma-ray Bursts
Hoi-Fung Yu, Hendrik J. van Eerten, Jochen Greiner +5
We explain the results of Yu et al. (2015b) of the novel sharpness angle measurement to a large number of spectra obtained from the Fermi gamma-ray burst monitor. The sharpness ang…
V5116 Sgr, an Eclipsing Supersoft Post-Outburst Nova?
Gloria Sala, Margarita Hernanz, Carlo Ferri +1
V5116 Sgr (Nova Sgr 2005 No. 2), discovered on 2005 July 4, was observed with XMM-Newton in March 2007, 20 months after the optical outburst. The X-ray spectrum shows that the nova…
When A Standard Candle Flickers
Colleen A. Wilson-Hodge, Michael L. Cherry, Wayne H. Baumgartner +27
The Crab Nebula is the only hard X-ray source in the sky that is both bright enough and steady enough to be easily used as a standard candle. As a result, it has been used as a nor…
Constraints on the Synchrotron Shock Model for the Fermi GBM Gamma-Ray Burst 090820A
J. Michael Burgess, Robert D. Preece, Matthew G. Baring +25
Discerning the radiative dissipation mechanism for prompt emission in Gamma-Ray Bursts (GRBs) requires detailed spectroscopic modeling that straddles the peak in the 100 k…
The benefit of simultaneous seven-filter imaging: 10 years of GROND observations
Jochen Greiner
A variety of scientific results have been achieved over the last 10 years with the GROND simultaneous 7-channel imager at the 2.2m telescope of the Max-Planck Society at ESO/La Sil…
WASP-4b Transit Observations With GROND
Nikolay Nikolov, Thomas Henning, Johannes Koppenhoefer +3
Ground-based simultaneous multiband transit observations allow an accurate system parameters determination and may lead to the detection and characterization of additional bodies v…
A New Derivation of GRB Jet Opening Angles from the Prompt Gamma-Ray Emission
Adam Goldstein, Robert D. Preece, Michael S. Briggs +24
The jet opening angle of gamma-ray bursts (GRBs) is an important parameter for determining the characteristics of the progenitor, and the information contained in the opening angle…
Temporal Deconvolution study of Long and Short Gamma-Ray Burst Light curves
P. N. Bhat, Michael S. Briggs, Valerie Connaughton +24
The light curves of Gamma-Ray Bursts (GRBs) are believed to result from internal shocks reflecting the activity of the GRB central engine. Their temporal deconvolution can reveal p…
Swift J2058.4+0516: Discovery of a Possible Second Relativistic Tidal Disruption Flare?
S. Bradley Cenko, Hans A. Krimm, Assaf Horesh +18
We report the discovery by the Swift hard X-ray monitor of the transient source Swift J2058.4+0516 (Sw J2058+05). Our multi-wavelength follow-up campaign uncovered a long-lived (du…
INTEGRAL reloaded: spacecraft, instruments and ground system
Erik Kuulkers, Carlo Ferrigno, Peter Kretschmar +85
ESA's INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) was launched on 17 Oct 2002 at 06:41 CEST. Since then, it has been providing long, uninterrupted observations (up t…
The Highly Energetic Expansion of SN2010bh Associated with GRB 100316D
Filomena Bufano, Elena Pian, Jesper Sollerman +50
We present the spectroscopic and photometric evolution of the nearby (z = 0.059) spectroscopically confirmed type Ic supernova, SN 2010bh, associated with the soft, long-duration g…
XMM-Newton observations of the microquasars GRO J1655-40 and GRS 1915+105
Gloria Sala, Jochen Greiner, Frank Haberl +4
We present results of a sequence of XMM-Newton observations of the two microquasars GRO J1655-40 and GRS 1915+105. The observations were preformed using the EPIC-pn camera in the B…
The 2nd Fermi GBM Gamma-Ray Burst Catalog: The First Four Years
Andreas von Kienlin, Charles A. Meegan, William S. Paciesas +30
This is the second of a series of catalogs of gamma-ray bursts (GRBs) observed with the Fermi Gamma-ray Burst Monitor (GBM). It extends the first two-year catalog by two more years…
Time-Resolved Spectroscopy of the 3 Brightest and Hardest Short Gamma-Ray Bursts Observed with the FGST Gamma-Ray Burst Monitor
Sylvain Guiriec, Michael S. Briggs, Valerie Connaugthon +25
From July 2008 to October 2009, the Gamma-ray Burst Monitor (GBM) on board the Fermi Gamma-ray Space Telescope (FGST) has detected 320 Gamma-Ray Bursts (GRBs). About 20% of these e…
Supernova 2010as: the Lowest-Velocity Member of a Family of Flat-Velocity Type IIb Supernovae
Gastón Folatelli, Melina C. Bersten, Hanindyo Kuncarayakti +23
We present extensive optical and near-infrared photometric and spectroscopic observations of the stripped-envelope (SE) supernova SN 2010as. Spectroscopic peculiarities, such as in…
Gamma-Ray Bursts: Old and New
Jochen Greiner
Gamma-ray bursts are sudden releases of energy that for a duration of a few seconds outshine even huge galaxies. 30 years after the first detection of a gamma-ray burst their origi…
Filling up the period gap: RX J0803.4-4748, a new 137 minute polar
Robert Schwarz, Jochen Greiner
We report the discovery of a new AM Herculis system as the counterpart of the bright and very soft X-ray source RX J0803.4-4748 found serendipitously in a ROSAT PSPC pointing. Opti…
A novel compact 4-channel beam splitter based on a Kösters-type prism
Jochen Greiner, Uwe Laux
We introduce a novel compact 4-channel beam splitter which is based on a combination of dichroic coatings and internal total reflection, similar in concept to the interference doub…
ejecta in young supernova remnants
Christoph Weinberger, Roland Diehl, Moritz M. M. Pleintinger +2
Context: Tracing unstable isotopes produced in supernova nucleosynthesis provides a direct diagnostic of supernova explosion physics. Theoretical models predict an extensive variet…
Constraining the environment of GRB 990712 through emission line fluxes
Aybuke Kupcu Yoldas, Jochen Greiner, Rosalba Perna
The energy output in the gamma-ray burst (GRB) prompt emission and afterglow phase is expected to photoionize the surrounding medium out to large radii. Cooling of this gas produce…
nazgul: A statistical approach to gamma-ray burst localization. Triangulation via non-stationary time-series models
J. Michael Burgess, Ewan Cameron, Dmitry Svinkin +1
Context. Gamma-ray bursts can be located via arrival time signal triangulation using gamma-ray detectors in orbit throughout the solar system. The classical approach based on cross…