|
Strange explosion
(
1 2
)
(Preview)
|
Astronomy News
|
14
|
18625
|
|
| |
Scientists are studying a strange explosion that appeared on February 18, 2006, about 440 million light years away in the constellation Aries.
The "before" image on the left is from the Sloan Digital Sky Survey.
The "after" image on the right is from NASA Swift's Ultraviolet/Optical Telesc...
|
|
|
|
|
|
|
Gamma-Ray Bursts
(
1 2 3 4 5 … 8
)
(Preview)
|
Cosmology News
|
70
|
47824
|
|
| |
Long duration gamma-ray bursts (GRBs) seem to involve very massive stars. A new clue indicating this was uncovered recently by a series of ima...
|
|
|
|
|
|
|
GRB050904
(
1 2
)
(Preview)
|
Astronomy News
|
11
|
16430
|
|
| |
NASA is hosting a media teleconference at 18:00 GMT, Monday, September 12 to announce the detection of the most distant explosion yet, a gamma-ray burst from the edge of the visible universe.
Scientists detected the burst using the Swift satellite. Several ground-based telescopes, including...
|
|
|
|
|
|
|
Short gamma-ray bursts
(Preview)
|
Astronomy News
|
8
|
8252
|
|
| |
Just a reminder to say that on Wednesday, NASA will announce new findings related to short gamma-ray bursts .
Since the 1980s, the two most popular theories of the origin of gamma-ray bursts postulated stupendous explosions at gigantic distances, either from a supernova caused by the...
|
|
|
|
|
|
|
GRB 060729
(Preview)
|
Cosmology News
|
0
|
2516
|
|
| |
Gamma-Ray Burst Challenges Theory In a series of landmark observations gathered over a period of four months, NASA's Swift satellite has challenged some of astronomers' fundamental ideas about gamma-ray bursts (GRBs), which are among the most extreme events in our universe. GRBs are t...
|
|
|
|
|
|
|
GRB 051109B
(Preview)
|
Cosmology News
|
0
|
2770
|
|
| |
Title: Swift Observations of GRB 051109B Authors: E. Troja, G. Cusumano, V. LaParola, V.Mangano, T. Mineo (INAF - IASFPA) We present Swift observations of GRB 051109B, a soft long burst triggered by the Burst Alert Telescope (BAT). The soft photon index of the prompt emission suggest it is a X-ray F...
|
|
|
|
|
|
|
GRB050724
(Preview)
|
Cosmology News
|
1
|
5635
|
|
| |
An international team of astronomers reports the discovery of a third short gamma-ray burst (GBR) type, associated with a nearby elliptical galaxy. The low level of star formation in such galaxies and the detection of a second long-lasting flare indicate that this gamma-ray burst is most likely t...
|
|
|
|
|
|
|
Hypernova GRB
(Preview)
|
Stars/galaxy News
|
1
|
5298
|
|
| |
Hypernova Reveals Hidden Identity As Gamma-Ray Burst :
An international research team, led by astronomers from the University of Tokyo, Hiroshima University, and the National Astronomical Observatory of Japan, used the Subaru telescope to obtain the spectrum of SN2003jd...
|
|
|
|
|
|
|
GRB 080916C
(Preview)
|
Cosmology News
|
0
|
2628
|
|
| |
Most Extreme Gamma-Ray Blast Ever, Seen by Fermi Gamma-ray Space Telescope With the greatest total energy, the fastest motions, and the highest-energy initial emissions ever before seen, a gamma-ray burst recently observed by the Fermi Gamma-ray Space Telescope is one for the record books. The...
|
|
|
|
|
|
|
Long Gamma Ray Bursts
(Preview)
|
Cosmology News
|
4
|
3346
|
|
| |
Title: Close Binary Progenitors of Long Gamma Ray Bursts Authors: M.V. Barkov, S.S. Komissarov The strong dependence of the neutrino annihilation mechanism on the mass accretion rate makes it difficult to explain the LGRBs with duration in excess of 100 seconds as well as the precursors separate...
|
|
|
|
|
|
|
GRB050911
(Preview)
|
Cosmology News
|
1
|
2590
|
|
| |
The Swift Satellite has detected long burst on the 5th September.
At 15:59:34 UT, the Swift-BAT triggered and located GRB050911 (trigger=154630).
The BAT on-board calculated position(2000) is RA, 13.692, Dec -38.861, with an uncertainty of 3 arcmin (radius, 90% containment...
|
|
|
|
|
|
|
GRB 051022
(Preview)
|
Cosmology News
|
0
|
2384
|
|
| |
Title: An Optically Dark GRB Observed by HETE-2: GRB 051022
Authors: Yujin E. Nakagawa, Atsumasa Yoshida, Satoshi Sugita, Kaoru Tanaka, Nobuyuki Ishikawa, Toru Tamagawa, Motoko Suzuki, Yuji Shirasaki, Nobuyuki Kawai, Masaru Matsuoka, Jean-Luc Atteia, Alexandre Pelangeo...
|
|
|
|
|
|
|
GRB 050713A
(Preview)
|
Cosmology News
|
0
|
2498
|
|
| |
Title: GRB 050713A: High Energy Observations of the GRB Prompt and Afterglow Emission
Authors: D.C. Morris, J. Reeves, V. Pal'shin, M. Garczarczyk, A.D.Falcone, D.N. Burrows, H. Krimm, N. Galante, M. Gaug, S. Mizobuchi, C. Pagani, A. Stamerra, M. Teshima, A.P. Beardmore, O. G...
|
|
|
|
|
|
|
GRB 971214
(Preview)
|
Cosmology News
|
0
|
2854
|
|
| |
GRB 971214 is a gamma ray burst observed in 1997. It originated 12 billion light years away. For a brief period this was thought by some researchers to have been the most energetic event observed in the universe, but this claim has since been discredited. R.A. = 11h56m30s, Decl. = +65o12'.6 (equino...
|
|
|
|
|
|
|
GRB 070616
(Preview)
|
Cosmology News
|
0
|
2476
|
|
| |
Title: Strong spectral evolution during the prompt emission of GRB 070616 Authors: R.L.C. Starling (University of Leicester, UK) Swift has revealed features in GRB early light curves, such as steep decays and X-ray flares, whose properties are consistent with an internal origin though they are...
|
|
|
|
|
|
|
GRB070201
(Preview)
|
Cosmology News
|
0
|
3106
|
|
| |
An international team of physicists, including University of Oregon scientists, has concluded that last February's intense burst of gamma rays possibly coming from the Andromeda Galaxy lacked a gravitational wave. That absence, they say, rules out an initial interpretation that the burst cam...
|
|
|
|
|
|
|
GRB 070125
(Preview)
|
Cosmology News
|
2
|
2969
|
|
| |
A team of astronomers has discovered a cosmic explosion that seems to have come from the middle of nowhere thousands of light-years from the nearest galaxy-sized collection of stars, gas, and dust. This "shot in the dark" is surprising because the type of explosion, a long-duration gam...
|
|
|
|
|
|
|
GRB060124
(Preview)
|
Cosmology News
|
0
|
2413
|
|
| |
Title: Theoretical interpretation of GRB060124: preliminary results Authors: Roberto Guida, Maria Grazia Bernardini, Carlo Luciano Bianco, Letizia Caito, Maria Giovanna Dainotti, Remo Ruffini We show the preliminary results of the application of our "fireshell" model to GRB06...
|
|
|
|
|
|
|
GRB 080822B
(Preview)
|
Cosmology News
|
0
|
2503
|
|
| |
At 21:02:52 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 080822B (trigger=321376). Swift did not slew to this burst because of the Moon observing constraint. It will come out of Moon constraint early 26 Aug 08 UT. The BAT on-board calculated location is RA, Dec 63.495, +25.7...
|
|
|
|
|
|
|
GRB 060614
(Preview)
|
Cosmology News
|
1
|
2780
|
|
| |
Title: A new class of gamma-ray bursts from stellar disruptions by intermediate mass black holes Authors: H.Gao, Y.Lu, S.N.Zhang It has been argued that the long gamma-ray burst (GRB) of GRB 060614 without an associated supernova (SN) has challenged the current classification and fuel model for...
|
|
|
|
|
