Ahlen, S., Afshordi, N., Battat, J. B. R., Billard, J., Bozorgnia, N., Burgos, S., ...
We present the case for a dark matter detector with directional sensitivity. This document was developed at the 2009 CYGNUS workshop on directional dark matter detection, and contains contributions...
The Interplanetary Network Supplement to the HETE-2 Gamma-Ray Burst Catalog (2009)
Hurley, K., Barraud, C., Pelangeon, A., Boer, M., Vanderspek, R., ...
Between 2000 November and 2006 May, one or more spacecraft of the interplanetary network (IPN) detected 226 cosmic gamma-ray bursts that were also detected by the FREGATE experiment aboard the...
Hurley, K., Rowlinson, A., Bellm, E., Perley, D., Mitrofanov, I. G., Golovin, D. V., ...
GRB 051103 is considered to be a candidate soft gamma repeater (SGR) extragalactic giant magnetar flare by virtue of its proximity on the sky to M81/M82, as well as its time history, localization,...
DMTPC: A dark matter detector with directional sensitivity (2009)
Battat, J. B. R., Ahlen, S., Caldwell, T., Dujmic, D., Dushkin, A., Fisher, P., ...
By correlating nuclear recoil directions with the Earth's direction of motion through the Galaxy, a directional dark matter detector can unambiguously detect Weakly Interacting Massive Particles...
Transport properties of electrons in CF4 (2009)
Caldwell, T., Roccaro, A., Sahin, T., Yegoryan, H., Dujmic, D., Ahlen, S., ...
Carbon-tetrafluoride (CF4) is used as a counting gas in particle detectors, but some of its properties that are of interest for large time-projection chambers are not well known. We measure the mean...
Pélangeon, A., Nakagawa, Y. E., Hurley, K., Yoshida, A., Vanderspek, R., ...
Aims: Taking advantage of the forthcoming Catalog of the HETE-2 mission, the aim of this paper is to evaluate the main properties of HETE-2 GRBs - the E_peak, the T_90 and the E_iso - in their source...
Sciolla, G., Battat, J., Caldwell, T., Cornell, B., Dujmic, D., Fisher, P., ...
Directional detection of Dark Matter allows for unambiguous direct detection of WIMPs as well as discrimination between various Dark Matter models in our galaxy. The DMTPC detector is a low-pressure...
DMTPC-10L: Direction-Sensitive Dark Matter Detector Prototype (2008)
Dujmic, D., Fisher, P., Lanza, R., Lopez, J., Kaboth, A., Kohse, G., ...
The known direction of motion of dark matter particles relative to the Earth may be a key for their unambiguous identification even in the presence of backgrounds. We describe a prototype detector...
DMTPC: a new apparatus for directional detection of Dark Matter (2008)
Sciolla, G., Lee, A., Battat, J., Caldwell, T., Cornell, B., Dujmic, D., ...
Directional detection of Dark Matter allows for unambiguous direct detection of WIMPs as well as discrimination between various Dark Matter models in our galaxy. The DMTPC detector is a low-pressure...
Toward directional detection of Dark Matter with the DM-TPC detector (2008)
Sciolla, G., Ahlen, S., Dujmic, D., Dutta, V., Fisher, P., Henderson, S., ...
Directional detection can provide unambiguous observation of Dark Matter interactions even in presence of insidious backgrounds. The DM-TPC collaboration is developing a detector with the goal of...
DM-TPC: a new approach to directional detection of Dark Matter (2008)
Sciolla, G., Ahlen, S., Dujmic, D., Dutta, V., Fisher, P., Henderson, S., ...
Directional detection can provide unambiguous observation of Dark Matter interactions even in presence of insidious backgrounds. The DM-TPC collaboration is developing a detector with the goal of...
Charge amplification concepts for direction-sensitive dark matter detectors (2008)
Dujmic, D., Fisher, P., Sciolla, G., Ahlen, S., Dutta, V., Henderson, S., ...
Direction measurement of weakly interacting massive particles in time-projection chambers can provide definite evidence of their existence and help to determine their properties. This article...
A Measurement of Photon Production in Electron Avalanches in CF4 (2008)
Kaboth, A., Monroe, J., Ahlen, S., Dujmic, D., Henderson, S., Kohse, G., ...
This paper presents a measurement of the ratio of photon to electron production and the scintillation spectrum in a popular gas for time pro jection chambers, carbon tetrafluoride (CF4), over the...
Improved measurement of the head-tail effect in nuclear recoils (2008)
Dujmic, D., Ahlen, S., Fisher, P., Henderson, S., Kaboth, A., Kohse, G., ...
We present new results with a prototype detector that is being developed by the DMTPC collaboration for the measurement of the direction tag (head-tail) of dark matter wind. We use neutrons from a...
Pélangeon, A., Nakagawa, Y. E., Hurley, K., Yoshida, A., Vanderspek, R., ...
Aims: Taking advantage of the forthcoming Catalog of the HETE-2 mission, the aim of this paper is to evaluate the main properties of HETE-2 GRBs - the E_peak, the T_90 and the E_iso - in their source...
Pélangeon, A., Nakagawa, Y. E., Hurley, K., Yoshida, A., Vanderspek, R., ...
Aims: Taking advantage of the forthcoming Catalog of the HETE-2 mission, the aim of this paper is to evaluate the main properties of HETE-2 GRBs - the E_peak, the T_90 and the E_iso - in their source...
Observation of the 'head-tail' effect in nuclear recoils of low-energy neutrons (2007)
Dujmic, D., Tomita, H., Lewandowska, M., Ahlen, S., Fisher, P., Henderson, S., ...
Directional detection of dark matter can provide unambiguous observation of dark matter interactions even in the presence of background. This article presents an experimental method to measure the...
Discovery of a New X-Ray Burst/Millisecond Accreting Pulsar HETE J1900.1-2455 (2006)
Suzuki, M., Kawai, N., Tamagawa, T., Yoshida, A., Nakagawa, Y. E., Tanaka, K., ...
A class of low-mass X-ray binary sources are known to be both X-ray burst sources and millisecond pulsars at the same time. A new source of this class was discovered by High Energy Transient Explorer...
X-ray Flashes or soft Gamma-ray Bursts? The case of the likely distant XRF 040912 (2006)
Stratta, G., Basa, S., Butler, N., Atteia, J. L., Gendre, B., Pelangeon, A., ...
In this work, we present a multi-wavelength study of XRF 040912, aimed at measuring its distance scale and the intrinsic burst properties. We performed a detailed spectral and temporal analysis of...
Donaghy, T. Q., Lamb, D. Q., Sakamoto, T., Norris, J. P., Nakagawa, Y., Villasenor, J., ...
Here we report the localizations and properties of four short-duration GRBs localized by the High Energy Transient Explorer 2 satellite (HETE-2): GRBs 010326B, 040802, 051211 and 060121, all of which...
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...
Discovery of the Millisecond X-Ray Pulsar HETE J1900.1-2455 (2005)
Kaaret, P., Morgan, E. H., Vanderspek, R., Tomsick, J. A.
We report the discovery of millisecond pulsations from the low-mass X-ray binary HETE J1900.1-2455 which was discovered by the detection of a type I X-ray burst by the High Energy Transient Explorer...
Discovery of the short gamma-ray burst GRB 050709 (2005)
Villasenor, J. S., Lamb, D. Q., Ricker, G. R., Kawai, N., Butler, N., ...
Gamma-Ray Bursts (GRBs) fall into two classes: short-hard and long-soft bursts. The latter are now known to have X-ray and optical afterglows, to occur at cosmological distances in star-forming...
Discovery of the short gamma-ray burst GRB 050709 (2005)
Villasenor, J. S., Lamb, D. Q., Ricker, G. R., Kawai, N., Butler, N., ...
Gamma-ray bursts (GRBs) fall into two classes: short-hard and long-soft bursts. The latter are now known to have X-ray and optical afterglows, to occur at cosmological distances in starforming...
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...
HETE-2 Observation of two gamma-ray bursts at z > 3 (2005)
Kawai, N., Vanderspek, R., Pizzichini, G., Ricker, G. R., Barraud, C., ...
GRB 020124 and GRB 030323 constitute half the sample of gamma-ray bursts with a measured redshift greater than 3. This paper presents the temporal and spectral properties of these two gamma-ray...
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...
HETE-2 Observation of two gamma-ray bursts at z > 3 (2005)
Kawai, N., Vanderspek, R., Pizzichini, G., Ricker, G. R., Barraud, C., ...
GRB 020124 and GRB 030323 constitute half the sample of gamma-ray bursts with a measured redshift greater than 3. This paper presents the temporal and spectral properties of these two gamma-ray...
HETE-2 Observation of two gamma-ray bursts at z > 3 (2005)
Kawai, N., Vanderspek, R., Pizzichini, G., Ricker, G. R., Barraud, C., ...
GRB 020124 and GRB 030323 constitute half the sample of gamma-ray bursts with a measured redshift greater than 3. This paper presents the temporal and spectral properties of these two gamma-ray...
HETE-2 Observation of two gamma-ray bursts at z > 3 (2005)
Kawai, N., Vanderspek, R., Pizzichini, G., Ricker, G. R., Barraud, C., ...
GRB 020124 and GRB 030323 constitute half the sample of gamma-ray bursts with a measured redshift greater than 3. This paper presents the temporal and spectral properties of these two gamma-ray...
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...
Vanderspek, R., Sakamoto, T., Barraud, C., Tamagawa, T., Graziani, C., Suzuki, M., ...
An exceptionally intense gamma-ray burst, GRB030329, was detected and localized by the instruments on board the High Energy Transient Explorer satellite (HETE) at 11:37:14 UT on 29 March 2003. The...
Chandra Observations of the Optically Dark GRB030528 (2004)
Butler, N., Dullighan, A., Ford, P., Ricker, G., Vanderspek, R., Hurley, K., ...
The X-ray-rich GRB030528 was detected by the HETE satellite and its localization was rapidly disseminated. However, early optical observations failed to detect a counterpart source. In a 2-epoch ToO...
Optical and X-ray Observations of the Afterglow to XRF030723 (2004)
Butler, N., Dullighan, A., Ford, P., Ricker, G., Vanderspek, R., Hurley, K., ...
The X-ray-flash XRF030723 was detected by the HETE satellite and rapidly disseminated, allowing for an optical transient to be detected ~1 day after the burst. We discuss observations in the optical...
Previously Claimed(/Unclaimed) X-ray Emission Lines in High Resolution Afterglow Spectra (2004)
Butler, N., Dullighan, A., Ford, P., Ricker, G., Vanderspek, R., Hurley, K., ...
We review the significance determination for emission lines in the Chandra HETGS spectrum for GRB020813, and we report on a search for additional lines in high resolution Chandra spectra. No...
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...
GRB 020531: A Short, Hard Gamma-Ray Burst Localized and Observed by HETE-2 (2003)
Lamb, D. Q., Ricker, G. R., Hurley, K., Kawai, N., Shirasaki, Y., ...
The HETE-2 FREGATE and WXM instruments detected a short, hard GRB at 00:26:18.72 UT on 31 May 2002. A preliminary localization was reported as a GCN Position Notice 88 min after the burst, and a...
Shirasaki, Y., Kawai, N., Yoshida, A., Matsuoka, M., Tamagawa, T., Torii, K., ...
The Wide-field X-ray Monitor (WXM) is one of the scientific instruments carried on the High Energy Transient Explorer 2 (HETE-2) satellite launched on 2000 October 9. HETE-2 is an international...
Highlights of the HETE-2 Mission (2003)
Lamb, D. Q., Ricker, G. R., 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...
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...
HETE-2 Localization and Observation of the Bright, X-Ray-Rich Gamma-Ray Burst GRB021211 (2003)
Crew, G. B., Lamb, D. Q., Ricker, G. R., Kawai, N., Vanderspek, R., ...
A bright, x-ray-rich GRB was detected by HETE-2 at 11:18:34.03 UT on 11 Dec 2002. The WXM localization was to 14' and relayed to the GCN 22 s after the start of the burst. The ground SXC localization...
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...
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...
Graziani, C., Shirasaki, Y., Donaghy, T., Fenimore, E., Galassi, M., Kawai, N., ...
WXM gives GRB localizations in instrument coordinates. WXM localizations must be converted to celestial coordinates using spacecraft aspect information obtained by the optical cameras on HETE. We...
Berger, E., Kulkarni, S. R., Bloom, J. S., Price, P. A., Fox, D. W., Frail, D. A., ...
We present ground-based optical observations of GRB 020124 starting 1.6 hours after the burst, as well as subsequent Very Large Array (VLA) and Hubble Space Telescope (HST) observations. The optical...
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...
HETE-2 Localization and Observations of the Short, Hard Gamma-Ray Burst GRB020531 (2002)
Lamb, D. Q., Ricker, G. R., Hurley, K., Kawai, N., Shirasaki, Y., ...
The {\it HETE-2} (hereafter \HETE) French Gamma Telescope (FREGATE) and the Wide-field X-ray Monitor (WXM) instruments detected a short ($t_{50} = 360$ msec in the FREGATE 85-300 keV energy band),...
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...
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...
HETE-II and the Interplanetary Network (2002)
Hurley, K., Crew, G., Ricker, G., Doty, J., Monnelly, G., ...
The FREGATE experiment aboard HETE-II has been successfully integrated into the Third Interplanetary Network (IPN) of gamma-ray burst detectors. We show how HETE's timing has been verified in flight,...
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...
A search for optical afterglow from GRB 970828 (1999)
Groot, P.J., Galama, T.J., Paradijs, J.A. Van, Kouveliotou, C., Bloom, J., ...
A search for optical afterglow from GRB 970828 (1998)
Groot, P.J., Galama, T.J., Paradijs, J.A. Van, Kouveliotou, C., Vanderspek, R., Castro-Tirado, A.J., ...
A search for optical afterglow from GRB 970828 (1998)
Groot, P.J., Galama, T.J., Paradijs, J. Van, Kouveliotou, C., Bloom, J., ...
We report on the results of R-band observations of the error box of the gamma -ray burst of 1997 August 28 made between 4 hr and 8 days after this burst occurred. No counterpart was found varying by...