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Probing GRB environments with time variability: ULTRASPEC fast imaging of GRB 080210

We present high time resolution (1.09 s) photometry of GRB 080210 obtained with ULTRASPEC mounted on the ESO/3.6-m telescope, starting 68.22 min after the burst and lasting for 26.45 min. The light curve is smooth on both short (down to…

Cosmology and Nongalactic Astrophysics · Physics 2011-06-30 A. De Cia , P. Jakobsson , G. Björnsson , P. M. Vreeswijk , V. S. Dhillon , T. R. Marsh , R. Chapman , J. P. U. Fynbo , C. Ledoux , S. P. Littlefair , D. Malesani , S. Schulze , A. Smette , T. Zafar , E. H. Gudmundsson

The triple-peaked afterglow of GRB 210731A from X-ray to radio frequencies

GRB 210731A was a long-duration gamma-ray burst discovered by the Burst Alert Telescope (BAT) aboard the Neil Gehrels Swift observatory. Swift triggered the wide-field, robotic MeerLICHT optical telescope in Sutherland; it began observing…

High Energy Astrophysical Phenomena · Physics 2023-03-15 S. de Wet , T. Laskar , P. J. Groot , F. Cavallaro , A. Nicuesa Guelbenzu , S. Chastain , L. Izzo , A. Levan , D. B. Malesani , I. M. Monageng , A. J. van der Horst , W. Zheng , S. Bloemen , A. V. Filippenko , D. A. Kann , S. Klose , D. L. A. Pieterse , A. Rau , P. M. Vreeswijk , P. Woudt , Z. -P. Zhu

The X-shooter GRB afterglow legacy sample (XS-GRB)

In this work we present spectra of all $\gamma$-ray burst (GRB) afterglows that have been promptly observed with the X-shooter spectrograph until 31-03-2017. In total, we obtained spectroscopic observations of 103 individual GRBs observed…

High Energy Astrophysical Phenomena · Physics 2019-03-13 J. Selsing , D. Malesani , P. Goldoni , J. P. U. Fynbo , T. Krühler , L. A. Antonelli , M. Arabsalmani , J. Bolmer , Z. Cano , L. Christensen , S. Covino , P. D'Avanzo , V. D'Elia , A. De Cia , A. de Ugarte Postigo , H. Flores , M. Friis , A. Gomboc , J. Greiner , P. Groot , F. Hammer , O. E. Hartoog , K. E. Heintz , J. Hjorth , P. Jakobsson , J. Japelj , D. A. Kann , L. Kaper , C. Ledoux , G. Leloudas , A. J. Levan , E. Maiorano , A. Melandri , B. Milvang-Jensen , E. Palazzi , J. T. Palmerio , D. A. Perley , E. Pian , S. Piranomonte , G. Pugliese , R. Sánchez-Ramírez , S. Savaglio , P. Schady , S. Schulze , J. Sollerman , M. Sparre , G. Tagliaferri , N. R. Tanvir , C. C. Thöne , S. D. Vergani , P. Vreeswijk , D. Watson , K. Wiersema , R. Wijers , D. Xu , T. Zafar

Multi-color observations of short GRB afterglows: 20 events observed between 2007 and 2010

We report on follow-up observations of 20 short-duration gamma-ray bursts performed in g'r'i'z'JHKs with the seven-channel imager GROND between mid-2007 and the end of 2010. This is one of the most comprehensive data sets on GRB afterglow…

High Energy Astrophysical Phenomena · Physics 2015-06-05 A. Nicuesa Guelbenzu , S. Klose , J. Greiner , D. A. Kann , T. Kruehler , A. Rossi , S. Schulze , P. M. J. Afonso , J. Elliott , R. Filgas , D. H. Hartmann , A. Kuepcue Yoldas , S. McBreen , M. Nardini , F. Olivares E. , A. Rau , S. Schmidl , P. Schady , V. Sudilovsky , A. C. Updike , A. Yoldas

GRB 040403: a faint X-ray rich Gamma-ray Burst discovered by INTEGRAL

GRB 040403 is one of the faintest gamma-ray bursts for which a rapid and accurate localization has been obtained. Here we report on the gamma-ray properties of this burst, based on observations with the IBIS instrument aboard INTEGRAL, and…

Astrophysics · Physics 2007-05-23 S. Mereghetti , D. Gotz , M. I. Andersen , A. Castro-Tirado , F. Frontera , J. Gorosabel , D. H. Hartmann , J. Hjorth , R. Hudec , K. Hurley , G. Pizzichini , N. Produit , A. Tarana , M. Topinka , P. Ubertini , A. de Ugarte

The afterglow, the redshift, and the extreme energetics of the gamma-ray burst 990123

Afterglow, or long-lived emission, has now been detected from about a dozen well-positioned gamma-ray bursts. Distance determinations made by measuring optical emission lines from the host galaxy, or absorption lines in the afterglow…

Astrophysics · Physics 2008-11-26 S. R. Kulkarni , S. G. Djorgovski , S. C. Odewahn , J. S. Bloom , R. R. Gal , C. D. Koresko , F. A. Harrison , L. M. Lubin , L. Armus , R. Sari , G. D. Illingworth , D. D. Kelson , D. K Magee , P. G. van Dokkum , D. A. Frail , J. S. Mulchaey , M. A. Malkan , I. S. McLean , H. I. Teplitz , D. Koerner , D. Kirkpatrick , N. Kobayashi , I. A. Yadigaroglu , J. Halpern , T. Piran , R. Goodrich , F. Chaffee , M. Feroci , E. Costa

An achromatic break in the afterglow of the short GRB 140903A: evidence for a narrow jet

We report the results of our observing campaign on GRB140903A, a nearby (z=0.351) short duration (T90~0.3 s) gamma-ray burst discovered by Swift. We monitored the X-ray afterglow with Chandra up to 21 days after the burst, and detected a…

High Energy Astrophysical Phenomena · Physics 2016-08-17 E. Troja , T. Sakamoto , S. B. Cenko , A. Lien , N. Gehrels , A. J. Castro-Tirado , R. Ricci , J. Capone , V. Toy , A. Kutyrev , N. Kawai , A. Cucchiara , A. Fruchter , J. Gorosabel , S. Jeong , A. Levan , D. Perley , R. Sanchez-Ramirez , N. Tanvir , S. Veilleux

Photometric and Spectroscopic Observations of GRB 210104A: Bright Reverse shock Emission and Dense Circumburst Environment

Early afterglow observations of gamma-ray bursts (GRBs) are valuable for exploring the properties of their jets and ambient medium. We report our photometric and spectroscopic observations of GRB 210104A and discuss its jet properties with…

High Energy Astrophysical Phenomena · Physics 2022-12-16 Lu-Lu Zhang , Li-Ping Xin , Jing Wang , Xu-Hui Han , Dong Xu , Zi-Pei Zhu , Chao Wu , Jian-Yan Wei , En-Wei Liang

Swift XRT Observations of the Breaking X-ray Afterglow of GRB 050318

We report the results of Swift X-Ray Telescope (XRT) observations of GRB 050318. This event triggered the Burst Alert Telescope (BAT) aboard Swift and was followed-up with XRT and UVOT for 11 consecutive orbits starting from 54 minutes…

Astrophysics · Physics 2009-11-11 M. Perri , P. Giommi , M. Capalbi , L. Amati , F. Frontera , G. Chincarini , S. Campana , A. Moretti , P. Romano , G. Tagliaferri , G. Cusumano , V. La Parola , V. Mangano , T. Mineo , D. N. Burrows , J. E. Hill , J. A. Kennea , D. C. Morris , C. Pagani , J. A. Nousek , L. Angelini , N. Gehrels , M. Still , A. P. Beardmore , M. R. Goad , O. Godet , P. T. O'Brien , J. P. Osborne , K. L. Page

RAPTOR observations of delayed explosive activity in the high-redshift gamma-ray burst GRB 060206

The RAPid Telescopes for Optical Response (RAPTOR) system at Los Alamos National Laboratory observed GRB 060206 starting 48.1 minutes after gamma-ray emission triggered the Burst Alert Telescope (BAT) on-board the Swift satellite. The…

Astrophysics · Physics 2009-11-11 P. R. Wozniak , W. T. Vestrand , J. A. Wren , R. R. White , S. M. Evans , D. Casperson

Swift panchromatic observations of the bright gamma-ray burst GRB050525a

The bright gamma-ray burst GRB050525a has been detected with the Swift observatory, providing unique multiwavelength coverage from the very earliest phases of the burst. The X-ray and optical/UV afterglow decay light curves both exhibit a…

Astrophysics · Physics 2019-08-14 A. J. Blustin , D. Band , S. Barthelmy , P. Boyd , M. Capalbi , S. T. Holland , F. E. Marshall , K. O. Mason , M. Perri , T. Poole , P. Roming , S. Rosen , P. Schady , M. Still , B. Zhang

Short GRB 130603B: Discovery of a jet break in the optical and radio afterglows, and a mysterious late-time X-ray excess

We present radio, optical/NIR, and X-ray observations of the afterglow of the short-duration 130603B, and uncover a break in the radio and optical bands at 0.5 d after the burst, best explained as a jet break with an inferred jet opening…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Wen-fai Fong , Edo Berger , Brian D. Metzger , Raffaella Margutti , Ryan Chornock , Giulia Migliori , Ryan J. Foley , B. Ashley Zauderer , Ragnhild Lunnan , Tanmoy Laskar , Steven J. Desch , Karen J. Meech , Sarah Sonnett , Claire M. Dickey , Anne M. Hedlund , Paul Harding

PROMPT Observations of the Early-Time Optical Afterglow of GRB 060607A

PROMPT (Panchromatic Robotic Optical Monitoring and Polarimetry Telescopes) observed the early-time optical afterglow of GRB 060607A and obtained a densely sampled multiwavelength light curve that begins only tens of seconds after the GRB.…

Astrophysics · Physics 2009-06-23 M. Nysewander , D. E. Reichart , J. A. Crain , A. Foster , J. Haislip , K. Ivarsen , A. Lacluyze , A. Trotter

A Comprehensive Study of Gamma-Ray Burst Optical Emission: III. Brightness Distributions and Luminosity Functions of Optical Afterglows

We continue our systematic statistical study on optical afterglow data of gamma-ray bursts (GRBs). We present the apparent magnitude distributions of early optical afterglows at different epochs (t= 10^2 s, t = 10^3 s, and 1 hour) for the…

High Energy Astrophysical Phenomena · Physics 2015-06-16 Xiang-Gao Wang , En-Wei Liang , Liang Li , Rui-Jing Lu , Jian-Yan Wei , Bing Zhang

Optical afterglow of the not so dark GRB 021211

We determine Johnson $B,V$ and Cousins $R,I$ photometric CCD magnitudes for the afterglow of GRB 021211 during the first night after the GRB trigger. The afterglow was very faint and would have been probably missed if no prompt observation…

Astrophysics · Physics 2009-11-07 S. B. Pandey , G. C. Anupama , R. Sagar , D. Bhattacharya , A. J. Castro-Tirado , D. K. Sahu , Padmakar Parihar , T. P. Prabhu

H.E.S.S. Observations of the Prompt and Afterglow Phases of GRB 060602B

We report on the first completely simultaneous observation of a gamma-ray burst (GRB) using an array of Imaging Atmospheric Cherenkov Telescopes which is sensitive to photons in the very-high-energy (VHE) gamma-ray range (>~100 GeV). On…

Astrophysics · Physics 2008-12-18 HESS Collaboration , F. Aharonian

GRB990510: on the possibility of a beamed X-ray afterglow

We discuss the prompt emission of the gamma-ray burst (GRB) 990510 and its subsequent X-ray afterglow from 8.0 to 44.3 hrs after the prompt emission, using observations with the Gamma-ray Burst Monitor and Narrow Field Instruments on…

Astrophysics · Physics 2009-10-31 E. Kuulkers , L. A. Antonelli , L. Kuiper , J. S. Kaastra , L. Amati , E. Costa , F. Frontera , J. Heise , J. J. M. in 't Zand , N. Masetti , L. Nicastro , E. Pian , L. Piro , P. Soffita

The Early (<1 hr) Multi-Color Afterglow of GRB 050502a: Possible Evidence for a Uniform Medium with Density Clumps

The 2-m robotic Liverpool Telescope reacted promptly to the gamma-ray burst GRB 050502a discovered by INTEGRAL and started observing 3 min after the onset of the GRB. The automatic identification of a bright afterglow of r'~15.8 triggered…

Astrophysics · Physics 2007-08-29 C. Guidorzi , A. Monfardini , A. Gomboc , C. G. Mundell , I. A. Steele , D. Carter , M. F. Bode , R. J. Smith , C. J. Mottram , M. J. Burgdorf , N. R. Tanvir , N. Masetti , E. Pian , ;

IR and Optical Observations of GRB 030115

We present an upper limit on the brightness of the afterglow of the long GRB 030115 measured from Infrared (IR) images taken with the Magellan Classic Cam instrument of Ks > 22 at 6.2 days after the burst. We also present measurments of the…

Astrophysics · Physics 2009-11-10 Allyn Dullighan , George Ricker , Nathaniel Butler , Roland Vanderspek

GRB 000418: A Hidden Jet Revealed?

We report on optical, near-infrared and centimeter radio observations of GRB000418 which allow us to follow the evolution of the afterglow from 2 to 200 days after the gamma-ray burst. In modeling these broad-band data, we find that an…

Astrophysics · Physics 2009-11-06 E. Berger , A. Diercks , D. A. Frail , S. R. Kulkarni , J. S. Bloom , R. Sari , J. Halpern , N. Mirabal , G. B. Taylor , K. Hurley , G. Pooley , K. M. Becker , R. M. Wagner , D. M. Terndrup , T. Statler , E. Mazets , T. Cline