Global Characteristics of X-Ray Flashes and X-Ray-Rich GRBs Observed by HETE-2 (2006)
Sakamoto, T., Lamb, D. Q., Graziani, C., Donaghy, T. Q., Suzuki, M., Ricker, G., ...
We describe and discuss the global properties of 45 gamma-ray bursts (GRBs) observed by HETE-2 during the first three years of its mission, focusing on the properties of X-Ray Flashes (XRFs) and...
Limits on the early afterglow phase of gamma-ray burst sources from TAROT-1 (2005)
Boer, M, Atteia, J-L, Bringer, M, Gendre, B, Klotz, A, Malina, R, ...
The Telescope a Action Rapide pour les Objets Transitoires (TAROT-1) has as prime objective the observation of the prompt and delayed emission of cosmic gamma-ray bursts (GRBs). We have performed a...
Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE (2005)
Barraud, C., Olive, J-F., Lestrade, J. P., Atteia, J-L., Hurley, K., Ricker, G., ...
We present a spectral analysis of 35 GRBs detected with the HETE-2 gamma-ray detectors (the FREGATE instrument) in the energy range 7-400 keV. The GRB sample analyzed is made of GRBs localized with...
Observation and implications of the Epeak - Eiso correlation in Gamma-Ray Bursts (2005)
Atteia, J-L., Ricker, G. R., Lamb, D. Q., Sakamoto, T., Graziani, C., Donaghy, T., ...
The availability of a few dozen GRB redshifts now allows studies of the intrinsic properties of these high energy transients. Amati et al. recently discovered a correlation between Epeak, the...
A simple empirical redshift indicator for gamma-ray bursts (2005)
We propose a new empirical redshift indicator for gamma-ray bursts. This indicator is easily computed from the gamma-ray burst spectral parameters, and its duration, and it provides...
In flight performance and first results of FREGATE (2005)
Atteia, J-L., Boer, M., Cotin, F., Couteret, J., Dezalay, J-P., Ehanno, M., ...
The gamma-ray detector of HETE-2, called FREGATE, has been designed to detect gamma-ray bursts in the energy range [6-400] keV. Its main task is to alert the other instruments of the occurrence of a...
Redshift indicators for gamma-ray bursts (2005)
The measure of the distances and luminosities of gamma-ray bursts (GRBs) led to the discovery that many GRB properties are strongly correlated with their intrinsic luminosity, leading to the...
Global Characteristics of X-Ray Flashes and X-Ray-Rich GRBs Observed by HETE-2 (2004)
Sakamoto, T., Lamb, D. Q., Graziani, C., Donaghy, T. Q., Suzuki, M., Ricker, G., ...
We describe and discuss the global properties of 45 gamma-ray bursts (GRBs) observed by HETE-2 during the first three years of its mission, focusing on the properties of X-Ray Flashes (XRFs) and...
High Energy Observations of XRF 030723: Evidence for an Off-axis Gamma-Ray Burst? (2004)
Butler, N. R., Sakamoto, T., Suzuki, M., Kawai, N., Lamb, D. Q., Graziani, C., ...
We report High Energy Transient Explorer 2 (HETE-2) Wide Field X-ray Monitor/French Gamma Telescope observations of XRF030723 along with observations of the XRF afterglow made using the 6.5m Magellan...
Global Characteristics of X-Ray Flashes and X-Ray-Rich GRBs Observed by HETE-2 (2004)
Sakamoto, T., Lamb, D. Q., Graziani, C., Donaghy, T. Q., Suzuki, M., Ricker, G., ...
We describe and discuss the global properties of 45 gamma-ray bursts (GRBs) observed by HETE-2 during the first three years of its mission, focusing on the properties of X-Ray Flashes (XRFs) and...
Global Characteristics of X-Ray Flashes and X-Ray-Rich GRBs Observed by HETE-2 (2004)
Sakamoto, T., Lamb, D. Q., Graziani, C., Donaghy, T. Q., Suzuki, M., Ricker, G., ...
We describe and discuss the global properties of 45 gamma-ray bursts (GRBs) observed by HETE-2 during the first three years of its mission, focusing on the properties of X-Ray Flashes (XRFs) and...
Observation and implications of the Epeak - Eiso correlation in Gamma-Ray Bursts (2003)
Atteia, J-L., Ricker, G. R., Lamb, D. Q., Sakamoto, T., Graziani, C., Donaghy, T., ...
The availability of a few dozen GRB redshifts now allows studies of the intrinsic properties of these high energy transients. Amati et al. recently discovered a correlation between Epeak, the...
HETE-2 Observations of the Extremely Soft X-Ray Flash XRF 020903 (2003)
Sakamoto, T., Lamb, D. Q., Graziani, C., Donaghy, T. Q., Suzuki, M., Ricker, G., ...
We report HETE-2 WXM/FREGATE observations of the X-ray flash, XRF 020903. This event was extremely soft: the ratio log(S_X/S_gamma) = 0.7, where S_X and S_gamma are the fluences in the 2-30 and...
Scientific Highlights of the HETE-2 Mission (2003)
Lamb, D. Q., Ricker, G. R., Atteia, J-L., Barraud, C., Boer, M., Braga, J., ...
The HETE-2 mission has been highly productive. It has observed more than 250 GRBs so far. It is currently localizing 25 - 30 GRBs per year, and has localized 43 GRBs to date. Twenty-one of these...
A simple empirical redshift indicator for gamma-ray bursts (2003)
We propose a new empirical redshift indicator for gamma-ray bursts. This indicator is easily computed from the gamma-ray burst spectral parameters, and its duration, and it provides...
Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE (2003)
Barraud, C., Olive, J-F., Lestrade, J. P., Atteia, J-L., Hurley, K., Ricker, G., ...
We present a spectral analysis of 35 GRBs detected with the HETE-2 gamma-ray detectors (the FREGATE instrument) in the energy range 7-400 keV. The GRB sample analyzed is made of GRBs localized with...
Observation and implications of the Epeak - Eiso correlation in Gamma-Ray Bursts (2003)
Atteia, J-L., Ricker, G. R., Lamb, D. Q., Sakamoto, T., Graziani, C., Donaghy, T., ...
The availability of a few dozen GRB redshifts now allows studies of the intrinsic properties of these high energy transients. Amati et al. recently discovered a correlation between Epeak, the...
A simple empirical redshift indicator for gamma-ray bursts (2003)
We propose a new empirical redshift indicator for gamma-ray bursts. This indicator is easily computed from the gamma-ray burst spectral parameters, and its duration, and it provides...
Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE (2003)
Barraud, C., Olive, J-F., Lestrade, J. P., Atteia, J-L., Hurley, K., Ricker, G., ...
We present a spectral analysis of 35 GRBs detected with the HETE-2 gamma-ray detectors (the FREGATE instrument) in the energy range 7-400 keV. The GRB sample analyzed is made of GRBs localized with...
Observation and implications of the Epeak - Eiso correlation in Gamma-Ray Bursts (2003)
Atteia, J-L., Ricker, G. R., Lamb, D. Q., Sakamoto, T., Graziani, C., Donaghy, T., ...
The availability of a few dozen GRB redshifts now allows studies of the intrinsic properties of these high energy transients. Amati et al. recently discovered a correlation between Epeak, the...
A simple empirical redshift indicator for gamma-ray bursts (2003)
We propose a new empirical redshift indicator for gamma-ray bursts. This indicator is easily computed from the gamma-ray burst spectral parameters, and its duration, and it provides...
Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE (2002)
Barraud, C., Olive, J-F., Lestrade, J. P., Atteia, J-L., Hurley, K., Ricker, G., ...
We present a spectral analysis of 35 GRBs detected with the HETE-2 gamma-ray detectors (the FREGATE instrument) in the energy range 7-400 keV. The GRB sample analyzed is made of GRBs localized with...
In-flight verification of the FREGATE spectral response (2002)
Olive, J-F., Dezalay, J-P., Atteia, J-L., Barraud, C., Butler, N., Crew, G. B., ...
We present the first results of the in-flight validation of the spectral response of the FREGATE X/gamma detectors on-board the HETE-2 satellite. This validation uses the Crab pulsar and nebula as...
FREGATE observation of a strong burst from SGR1900+14 (2002)
Olive, J-F., Hurley, K., Dezalay, J-P., Atteia, J-L., Barraud, C., Butler, N., ...
After a long period of quiescence, the soft gamma repeater SGR1900+14 was suddenly reactivated on April 2001. On July 2, 2001, a bright flare emitted by this source triggerred the WXM and FREGATE...
In flight performance and first results of FREGATE (2002)
Atteia, J-L., Boer, M., Cotin, F., Couteret, J., Dezalay, J-P., Ehanno, M., ...
The gamma-ray detector of HETE-2, called FREGATE, has been designed to detect gamma-ray bursts in the energy range [6-400] keV. Its main task is to alert the other instruments of the occurrence of a...
Stern, B. E., Atteia, J-L., Hurley, K.
We show that the source population of long gamma-ray bursts (GRBs) has declined by at least a factor of 12 (at the 90% confidence level) since the early stages of the Universe ($z \sim 2 - 3$). This...
GRB010921: Localization and Observations by the HETE Satellite (2002)
Ricker, G., Hurley, K., Lamb, D., Woosley, S., Atteia, J-L, Kawai, N., ...
On September 21 at 18950.56 SOD (05:15:50.56) UT the FREGATE gamma-ray instrument on the High Energy Transient Explorer (HETE) detected a bright gamma-ray burst (GRB). The burst was also seen by the...
In flight performance and first results of FREGATE (2002)
Atteia, J-L., Boer, M., Cotin, F., Couteret, J., Dezalay, J-P., Ehanno, M., ...
The gamma-ray detector of HETE-2, called FREGATE, has been designed to detect gamma-ray bursts in the energy range [6-400] keV. Its main task is to alert the other instruments of the occurrence of a...
In flight performance and first results of FREGATE (2002)
Atteia, J-L., Boer, M., Cotin, F., Couteret, J., Dezalay, J-P., Ehanno, M., ...
The gamma-ray detector of HETE-2, called FREGATE, has been designed to detect gamma-ray bursts in the energy range [6-400] keV. Its main task is to alert the other instruments of the occurrence of a...
Limits on the early afterglow phase of gamma-ray burst sources from TAROT-1 (2001)
Boer, M, Atteia, J-L, Bringer, M, Gendre, B, Klotz, A, Malina, R, ...
The T\'elescope \`a Action Rapide pour les Objets Transitoires (TAROT-1) has as prime objective the observation of the prompt and delayed emission of cosmic gamma-ray bursts (GRBs). We have performed...
Limits on the early afterglow phase of gamma-ray burst sources from TAROT-1 (2001)
Boer, M, Atteia, J-L, Bringer, M, Gendre, B, Klotz, A, Malina, R, ...
The Telescope a Action Rapide pour les Objets Transitoires (TAROT-1) has as prime objective the observation of the prompt and delayed emission of cosmic gamma-ray bursts (GRBs). We have performed a...
Limits on the early afterglow phase of gamma-ray burst sources from TAROT-1 (2001)
Boer, M, Atteia, J-L, Bringer, M, Gendre, B, Klotz, A, Malina, R, ...
The Telescope a Action Rapide pour les Objets Transitoires (TAROT-1) has as prime objective the observation of the prompt and delayed emission of cosmic gamma-ray bursts (GRBs). We have performed a...
Are bright gamma-ray bursts a fair sample ? (1999)
We conjecture that bright gamma-ray bursts (GRBs) are bright because they come from sources which are intrinsically over luminous and not because they come from nearby sources. We show that this...
Choosing a measure of GRB brightness that approaches a standard candle (1997)
Studies using the GRB brightness as a distance indicator require a measure of brightness with a small intrinsic dispersion (close to a standard candle). There is unfortunately no general agreement on...
Gamma-ray bursts: towards a standard candle luminosity (1997)
It is usual, in gamma-ray burst (GRB) studies, to compare the average properties of bright and faint GRBs, with the assumption that brightness classes reflect distance classes. When brightness is...