Kaaret, P., Abdo, A. A., Arons, J., Baring, M., Cui, W., Dingus, B., ...
This is a report on the findings of the Galactic compact objects working group for the white paper on the status and future of TeV gamma-ray astronomy. The white paper is an APS commissioned...
Status of the VERITAS Observatory (2008)
Holder, J., Acciari, V. A., Aliu, E., Arlen, T., Beilicke, M., Benbow, W., ...
VERITAS, an Imaging Atmospheric Cherenkov Telescope (IACT) system for gammma-ray astronomy in the GeV-TeV range, has recently completed its first season of observations with a full array of four...
Aliu, E., Beilicke, M., Benbow, W., Boettcher, M., Bradbury, S. M., ...
We report the detection of very high-energy gamma-ray emission from the intermediate-frequency-peaked BL Lacertae object W Comae (z=0.102) by VERITAS. The source was observed between January and...
VERITAS Observations of the gamma-Ray Binary LS I +61 303 (2008)
Acciari, V. A., Beilicke, M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Bugaev, V., ...
LS I +61 303 is one of only a few high-mass X-ray binaries currently detected at high significance in very high energy gamma-rays. The system was observed over several orbital cycles (between...
Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS (2008)
Acciari, V. A., Beilicke, M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Bugaev, V., ...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to study in detail processes occurring in Active Galactic Nuclei from radio waves to TeV gamma-rays. Here...
A Search for Dark Matter Annihilation with the Whipple 10m Telescope (2008)
Wood, M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Byrum, K. L., Chow, Y. C. K., ...
We present observations of the dwarf galaxies Draco and Ursa Minor, the local group galaxies M32 and M33, and the globular cluster M15 conducted with the Whipple 10m gamma-ray telescope to search for...
Veritas observations of the gamma-ray binary LS I+61 303 (2008)
Acciari, V. A., Beilicke, M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Bugaev, V., ...
LS I +61 303 is one of only a few high-mass X-ray binaries currently detected at high significance in very high energy gamma-rays. The system was observed over several orbital cycles ( between 2006...
Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS (2008)
Acciari, V. A., Beilicke, M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Bugaev, V., ...
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to study in detail processes occurring in active galactic nuclei from radio waves to TeV gamma-rays. Here...
Search for pulsar wind nebula associations with unidentified TeV gamma-ray sources (2008)
Chang, C., Konopelko, A., Cui, W.
Many of the recently discovered TeV gamma-ray sources are associated with pulsar wind nebulae (PWNe). In fact, they represent the most populous class of Galactic sources at TeV energies. In addition,...
Fossati, G., Buckley, J. H., Bond, I. H., Bradbury, S. M., Carter-Lewis, D. A., Chow, Y. C. K., ...
We present a detailed analysis of week-long simultaneous observations of the blazar Mrk 421 at 2-60 keV X-rays (RXTE) and TeV gamma-rays (Whipple and HEGRA) in 2001. Accompanying optical monitoring...
A search for dark matter annihilation with the whipple 10 m telescope (2008)
Wood, M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Byrum, K. L., Chow, Y. C. K., ...
We present observations of the dwarf galaxies Draco and Ursa Minor, the Local Group galaxies M32 and M33, and the globular cluster M15 conducted with the Whipple 10 m gamma-ray telescope to search...
The TeV energy spectrum of Markarian 421 measured in a high flaring state (2008)
Konopelko, A., Cui, W., Duke, C., Finley, J. P.
The BL Lac object (blazar) Mrk 421 was observed during its outburst in 2004 April with the Whipple 10 m telescope for a total of about 24.5 hr. The measured gamma-ray rate varied substantially over...
Xue, Y. Q., Wu, X. B., Cui, W.
We report results from a systematic study of the spectral energy distribution (SED) and spectral evolution of XTE J1550-564 and H 1743-322 in outbursts. The jets of both sources have been directly...
Fossati, G., Buckley, J. H., Bond, I. H., Bradbury, S. M., Carter-Lewis, D. A., Chow, Y. C. K., ...
(Abridged) We present a detailed analysis of week-long simultaneous observations of the blazar Mrk421 at 2-60 keV X-rays (RXTE) and TeV gamma-rays (Whipple and HEGRA) in 2001. The unprecedented...
The TeV Energy Spectrum of Mrk 421 Measured in A High Flaring State (2007)
Konopelko, A., Cui, W., Duke, C., Finley, J. P.
The BL Lac object (blazar) Mrk 421 was observed during its outburst in April 2004 with the Whipple 10 m telescope for a total of about 24.5 hours. The measured gamma-ray rate varied substantially...
Multiwavelength Observations of 1ES 1959+650, One Year After the Strong Outburst of 2002 (2007)
Gutierrez, K., Badran, H. M., Bradbury, S. M., Buckley, J. H., Celik, O., Chow, Y. C., ...
In April-May 2003, the blazar 1ES 1959+650 showed an increased level of X-ray activity. This prompted a multiwavelength observation campaign with the Whipple 10 m gamma-ray telescope, the Rossi X-ray...
Very High Energy Observations of Gamma-Ray Burst Locations with the Whipple Telescope (2007)
Horan, D., Atkins, R. W., Badran, H. M., Blaylock, G., Bradbury, S. M., Buckley, J. H., ...
Gamma-ray burst (GRB) observations at very high energies (VHE, E > 100 GeV) can impose tight constraints on some GRB emission models. Many GRB afterglow models predict a VHE component similar to that...
Very high energy observations of gamma-ray burst locations with the whipple telescope (2007)
Horan, D., Atkins, R. W., Badran, H. M., Blaylock, G., Bradbury, S. M., Buckley, J. H., ...
Gamma-ray burst (GRB) observations at very high energies (VHE; E > 100 GeV) can impose tight constraints on some GRB emission models. Many GRB afterglow models predict a VHE component similar to that...
On the radio/X-ray correlation in microquasars (2007)
Context. The broadband spectral energy distribution of microquasars has proven to be a valuable tool for assessing the roles of jets and accretion flows in microquasars, as well as the coupling...
The Whipple Observatory 10 m gamma-ray telescope, 1997-2006 (2007)
Kildea, J., Atkins, R. W., Badran, H. M., Blaylock, G., Bond, I. H., Bradbury, S. M., ...
Details are presented of the Whipple Observatory's 10 m atmospheric Cherenkov telescope and camera, as it evolved during the period 1997 until 2006. The design of the telescope and camera's optical...
Dramatic variability of X-ray absorption lines in the black hole candidate Cygnus X-1 (2007)
We report results from a 30 ks observation of Cygnus X-1 with the High Energy Transmission Grating Spectrometer (HETGS) on board the Chandra X-Ray Observatory. Numerous absorption lines were detected...
Chandra view of the unidentified TeV gamma-ray source Hess J1804-216 (vol 652, pg L109, 2006) (2007)
Very high energy observations of gamma-ray burst locations with the whipple telescope (2007)
Horan, D., Atkins, R. W., Badran, H. M., Blaylock, G., Bradbury, S. M., Buckley, J. H., ...
Gamma-ray burst (GRB) observations at very high energies (VHE; E > 100 GeV) can impose tight constraints on some GRB emission models. Many GRB afterglow models predict a VHE component similar to that...
Konopelko, A., Atkins, R. W., Blaylock, G., Buckley, J. H., Butt, Y., Carter-Lewis, D. A., ...
We report on observations of the sky region around the unidentified TeV gamma-ray source (TeV J2032+ 4130) carried out with the Whipple Observatory 10 m atmospheric Cerenkov telescope for a total of...
Modeling the accretion disk X-ray continuum of black hole candidates (2007)
We critically examine issues associated with determining the fundamental properties of the black hole and the surrounding accretion disk in an X-ray binary based on modeling the disk X-ray continuum...
The Whipple Observatory 10 m gamma-ray telescope, 1997-2006 (2007)
Kildea, J., Atkins, R. W., Badran, H. M., Blaylock, G., Bond, I. H., Bradbury, S. M., ...
Delamination buckling of a curved composite beam subjected to a closing bending moment (2006)
Wang, W., Shenoi, R.A., Cui, W.
The snap buckling case in a curved composite beam under a closing bending moment is dealt with.A theoretical approach is developed for the non-linear problem of delamination buckling which is likely...
Konopelko, A., Atkins, R. W., Blaylock, G., Buckley, J. H., Butt, Y., Carter-Lewis, D. A., ...
We report on observations of the sky region around the unidentified TeV gamma-ray source TeV J2032+4130 carried out with the Whipple Observatory 10 m atmospheric Cherenkov telescope for a total of...
Further Evidence for Variable Synchrotron Emission in XTE J1118+480 in Outburst (2006)
Hynes, R. I., Robinson, E. L., Pearson, K. J., Gelino, D. M., Cui, W., Xue, Y., ...
We present simultaneous multicolor infrared and optical photometry of the black hole X-ray transient XTE J1118+480 during its short 2005 January outburst, supported by simultaneous X-ray...
The First VERITAS Telescope (2006)
Holder, J., Atkins, R. W., Badran, H. M., Blaylock, G., Bradbury, S. M., Buckley, J. H., ...
The first atmospheric Cherenkov telescope of VERITAS (the Very Energetic Radiation Imaging Telescope Array System) has been in operation since February 2005. We present here a technical description...
Multiwavelength Observations of 1ES 1959+650, One Year After the Strong Outburst of 2002 (2006)
Gutierrez, K., Badran, H. M., Bradbury, S. M., Buckley, J. H., Celik, O., Chow, Y. C., ...
In April-May 2003, the blazar 1ES 1959+650 showed an increased level of X-ray activity. This prompted a multiwavelength observation campaign with the Whipple 10 m gamma-ray telescope, the Rossi X-ray...
TeV Gamma-Ray Observations of the Perseus and Abell 2029 Galaxy Clusters (2006)
Perkins, J. S., Badran, H. M., Blaylock, G., Bradbury, S. M., Cogan, P., Chow, Y. C. K., ...
Galaxy clusters might be sources of TeV gamma rays emitted by high-energy protons and electrons accelerated by large scale structure formation shocks, galactic winds, or active galactic nuclei....
Hot one-temperature accretion flows revisited (2006)
Yuan, F., Taam, R. E., Xue, Y. Q., Cui, W.
The effectiveness of the thermal coupling of ions and electrons in optically thin, hot accretion flows is investigated in a phenomenological approach. In the limit of complete coupling, we focus on...
Multiwavelength observations of the blazar Markarian 421 in 2002 December and 2003 January (2006)
Rebillot, P. F., Badran, H. M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Carter-Lewis, D. A., ...
We report on a multiwavelength campaign on the TeV gamma-ray blazar Mrk 421 performed during 2002 December and 2003 January. These target of opportunity observations were initiated by the detection...
TeV gamma-ray observations of the Perseus and Abell 2029 galaxy clusters (2006)
Perkins, J. S., Badran, H. M., Blaylock, G., Bradbury, S. M., Cogan, P., Chow, Y. C. K., ...
Galaxy clusters might be sources of TeV gamma rays emitted by high-energy protons and electrons accelerated by large-scale structure formation shocks, galactic winds, or active galactic nuclei....
Multiwavelength observations of 1ES 1959+650, 1 year after the strong outburst of 2002 (2006)
Gutierrez, K., Badran, H. M., Bradbury, S. M., Buckley, J. H., Celik, O., Chow, Y. C., ...
In 2003 April-May, the blazar 1ES 1959+650 showed an increased level of X-ray activity. This prompted a multiwavelength observation campaign with the Whipple 10 m gamma-ray telescope, the Rossi X-Ray...
Multiwavelength observations of 1ES 1959+650, 1 year after the strong outburst of 2002 (2006)
Gutierrez, K., Badran, H. M., Bradbury, S. M., Buckley, J. H., Celik, O., Chow, Y. C., ...
In 2003 April-May, the blazar 1ES 1959+650 showed an increased level of X-ray activity. This prompted a multiwavelength observation campaign with the Whipple 10 m gamma-ray telescope, the Rossi X-Ray...
TeV gamma-ray observations of the Perseus and Abell 2029 galaxy clusters (2006)
Perkins, J. S., Badran, H. M., Blaylock, G., Bradbury, S. M., Cogan, P., Chow, Y. C. K., ...
Galaxy clusters might be sources of TeV gamma rays emitted by high-energy protons and electrons accelerated by large-scale structure formation shocks, galactic winds, or active galactic nuclei....
Multiwavelength observations of the blazar Markarian 421 in 2002 December and 2003 January (2006)
Rebillot, P. F., Badran, H. M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Carter-Lewis, D. A., ...
We report on a multiwavelength campaign on the TeV gamma-ray blazar Mrk 421 performed during 2002 December and 2003 January. These target of opportunity observations were initiated by the detection...
Hot one-temperature accretion flows revisited (2006)
Yuan, F., Taam, R. E., Xue, Y. Q., Cui, W.
The effectiveness of the thermal coupling of ions and electrons in optically thin, hot accretion flows is investigated in a phenomenological approach. In the limit of complete coupling, we focus on...
Chandra view of the unidentified TeV gamma-ray source HESS J1804-216 (2006)
We present high-resolution X-ray images taken with the Chandra X-Ray Observatory of the field that contains the unidentified TeV gamma-ray source HESS J1804-216. A total of 11 discrete sources were...
The first VERITAS telescope (2006)
Holder, J., Atkins, R. W., Badran, H. M., Blaylock, G., Bradbury, S. M., Buckley, J. H., ...
The first atmospheric Cherenkov telescope of VERITAS (the Very Energetic Radiation Imaging Telescope Array System) has been in operation since February 2005. We present here a technical description...
Further evidence for variable synchrotron emission in XTE J1118+480 in outburst (2006)
Hynes, R. I., Robinson, E. L., Pearson, K. J., Gelino, D. M., Cui, W., Xue, Y. Q., ...
We present simultaneous multicolor infrared and optical photometry of the black hole X-ray transient XTE J1118+480 during its short 2005 January outburst, supported by simultaneous X-ray...
Multiwavelength observations of the blazar Markarian 421 in 2002 December and 2003 January (2006)
Rebillot, P. F., Badran, H. M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Carter-Lewis, D. A., ...
We report on a multiwavelength campaign on the TeV gamma-ray blazar Mrk 421 performed during 2002 December and 2003 January. These target of opportunity observations were initiated by the detection...
TeV gamma-ray observations of the Perseus and Abell 2029 galaxy clusters (2006)
Perkins, J. S., Badran, H. M., Blaylock, G., Bradbury, S. M., Cogan, P., Chow, Y. C. K., ...
Galaxy clusters might be sources of TeV gamma rays emitted by high-energy protons and electrons accelerated by large-scale structure formation shocks, galactic winds, or active galactic nuclei....
X-ray spectral variability of TeV blazars during rapid flares (2006)
The spectral energy distribution (SED) of TeV blazars peaks both at keV and TeV energies. The X-ray emission is generally believed to originate in the synchrotron emission from relativistic electrons...
Multiwavelength Observations of 1ES 1959+650, One Year After the Strong Outburst of 2002 (2006)
Gutierrez, K., Badran, H. M., Bradbury, S. M., Buckley, J. H., Celik, O., Chow, Y. C., ...
In April-May 2003, the blazar 1ES 1959+650 showed an increased level of X-ray activity. This prompted a multiwavelength observation campaign with the Whipple 10 m gamma-ray telescope, the Rossi X-ray...
Multiwavelength Observations of 1ES 1959+650, One Year After the Strong Outburst of 2002 (2006)
Gutierrez, K., Badran, H. M., Bradbury, S. M., Buckley, J. H., Celik, O., Chow, Y. C., ...
In April-May 2003, the blazar 1ES 1959+650 showed an increased level of X-ray activity. This prompted a multiwavelength observation campaign with the Whipple 10 m gamma-ray telescope, the Rossi X-ray...
Delamination buckling of a curved composite beam subjected to a closing bending moment (2006)
Wang, W., Shenoi, R. A., Cui, W.
The snap buckling case in a curved composite beam under a closing bending moment is dealt with.A theoretical approach is developed for the non-linear problem of delamination buckling which is likely...
Design of permanent magnet brushless motors with asymmetric air gap for electric vehicles (2006)
Chau, KT, Cui, W, Jiang, JZ, Wang, Z
This paper proposes a cost-effective approach to design permanent magnet brushless dc motors for electric vehicles. The key is to shape the pole arc in such a way that the air gap length is at a...
Hawley, R Scott, Gilbert, SP, Matthies, HJG, Gustafson, SM, Sproul, LR, Cui, W
Nod, a nonmotile kinesinlike protein, plays a critical role in segregating achiasmate chromosomes during female meiosis. In addition to localizing to oocyte chromosomes, we show that functional...
Wang, Q. D., Yao, Y., Tripp, T. M., Cui, W., Nicastro, F., ...
X-ray absorption lines of highly-ionized species such as OVII at about zero redshift have been firmly detected in the spectra of several active galactic nuclei. However, the location of the absorbing...
Yuan, F., Cui, W., Narayan, R.
Multiwavelength observations of the black hole X-ray binary XTE J1118+480 have offered abundant spectral and timing information about the source and have thus provided serious challenges to...
X-ray flares from Markarian 501 (2005)
Motivated by the recent discovery of a hierarchical X-ray flaring phenomenon in Mrk 421, we conducted a systematic search for X-ray flares from Mrk 501, another well-known TeV blazar, by making use...
Blazejowski, M. B., Blaylock, G., Bond, I. H., Bradbury, S. M., Buckley, J. H., Carter-Lewis, D. A., ...
We report results from an intensive multiwavelength monitoring campaign on the TeV blazar Mrk 421 over the period of 2003 - 2004. The source was observed simultaneously at TeV energies with the...
Wang, Q. D., Yao, Y., Tripp, T. M., Fang, T. T., Cui, W., Nicastro, F., ...
X-ray absorption lines of highly ionized species such as O VII at about zero redshift have been firmly detected in the spectra of several active galactic nuclei. However, the location of the...
Daniel, M. K., Badran, H. M., Bond, I. H., Boyle, P. J., Bradbury, S. M., Buckley, J. H., ...
The blazar 1ES 1959+650 was observed in a flaring state with the Whipple 10 m Imaging Atmospheric Cerenkov Telescope in 2002 May. A spectral analysis has been carried out on the data from that time...
Radio-X-ray correlation and the "quiescent state'' of black hole sources (2005)
Recently a correlation between the radio and X-ray luminosities, L-R proportional to L-X(0.7), was found in black hole sources including black hole candidates in our Galaxy and active galactic...
A survey of unidentified egret sources at very high energies (2005)
Fegan, S. J., Badran, H. M., Bond, I. H., Boyle, P. J., Bradbury, S. M., Buckley, J. H., ...
The Whipple Observatory 10 m γ-ray telescope has been used to survey the error boxes of EGRET unidentified sources in an attempt to find counterparts at energies of 350 GeV and above....
Coordinated multiwavelength observation of 3C 66A during the WEBT campaign of 2003-2004 (2005)
Bottcher, M., Harvey, J., Joshi, M., Villata, M., Raiteri, C. M., Bramel, D., ...
The BL Lac object 3C 66A was the target of an extensive multiwavelength monitoring campaign from 2003 July through 2004 April (with a core campaign from 2003 September to 2003 December) involving...