Soccer matches as experiments: how often does the 'best' team win? (2009)
Skinner, G. K., Freeman, G. H.
Models in which the number of goals scored by a team in a soccer match follow a Poisson distribution, or a closely related one, have been widely discussed. We here consider a soccer match as an...
Skinner, G. K., Krizmanic, J. F.
Interferometry provides one of the possible routes to ultra-high angular resolution for X-ray and gamma-ray astronomy. Sub-micro-arc-second angular resolution, necessary to achieve objectives such as...
The 22-Month Swift-BAT All-Sky Hard X-ray Survey (2009)
Tueller, J., Baumgartner, W. H., Markwardt, C. B., Skinner, G. K., Mushotzky, R. F., Ajello, M., ...
We present the catalog of sources detected in the first 22 months of data from the hard X-ray survey (14--195 keV) conducted with the BAT coded mask imager on the \swift satellite. The catalog...
Super-Orbital Variability in Hard X-rays (2008)
Farrell, S. A., Barret, D., Skinner, G. K.
We present the results of a study with the \emph{Swift} Burst Alert Telescope in the 14 -- 195 keV range of the long-term variability of 5 low mass X-ray binaries with reported or suspected...
Swift Observations of Shock Evolution in RS Ophiuchi (2008)
Bode, M. F., Osborne, J. P., Page, K. L., Beardmore, A. P., O'Brien, T. J., ...
Our \textit{Swift} observations of RS Oph form an unprecedented X-ray dataset to undertake investigations of both the central source and the interaction of the outburst ejecta with the circumstellar...
Detectability of gamma-ray emission from classical novae with Swift/BAT (2008)
Senziani, F., Skinner, G. K., Jean, P., Hernanz, M.
Classical novae are expected to emit gamma rays during their explosions. The most important contribution to the early gamma-ray emission comes from the annihilation with electrons of the positrons...
Energetic X-ray Imaging Survey Telescope (EXIST) (2008)
J. E. Grindlay, T. A. Prince, N. Gehrels, J. Tueller, C. J. Hailey, B. D. Ramsey, ...
We have begun to study a mission to carry out the rst high sensitivity imaging survey of the entire sky at hard x-ray energies (5-600 keV). The Energetic X-ray Imaging Survey Telescope (EXIST) would...
Positron astronomy with SPI/INTEGRAL (2008)
Weidenspointner, G., Skinner, G. K., Jean, P., Knödlseder, J., Von Ballmoos, P., Diehl, R., ...
Swift BAT Survey of AGN (2007)
Tueller, J., Mushotzky, R. F., Barthelmy, S., Cannizzo, J. K., Gehrels, N., Markwardt, C. B., ...
We present the results of the analysis of the first 9 months of data of the Swift BAT survey of AGN in the 14-195 keV band. Using archival X-ray data or follow-up Swift XRT observations, we have...
SPI imaging prospects for diffuse Galactic continuum hard X-rays. (2007)
A. W. Strong, R. Diehl, P. Connell, G. K. Skinner
ABSTRACT The performance of the INTEGRAL Spectrometer SPI for large-scale imaging of the Galactic diffuse continuum emission has been studied. Simulations of long-term survey data have been made...
Energetic X-ray Imaging Survey Telescope (EXIST) (2007)
J. E. Grindlay, T. A. Prince, N. Gehrels, J. Tueller, C. J. Hailey, B. D. Ramsey, ...
We have begun to study a mission to carry out the rst high sensitivity imaging survey of the entire sky at hard x-ray energies (5-600 keV). The Energetic X-ray Imaging Survey Telescope (EXIST) would...
Gamma-Ray Burst Studies With the Energetic X-ray Imaging Survey Telescope (EXIST) (2007)
F. A. Harrison, N. Gehrels, J. E. Grindlay, C. J. Hailey, T. A. Prince, B. D. Ramsey, ...
The Energetic X-ray Imaging Survey Telescope (EXIST) is a sensitive, wide eld of view hard X-ray (10 { 600 keV) coded-aperture telescope. This paper describes the capabilities and characteristics of...
Weidenspointner, G., Knoedlseder, J., Jean, P., Skinner, G. K., Vedrenne, G., ...
The imaging spectrometer SPI on board ESA's INTEGRAL observatory provides us with an unprecedented view of positron annihilation in our Galaxy. The first sky maps in the 511 keV annihilation line and...
Spectral analysis of the galactic positron annihilation emission (2007)
Jean, P., Weidenspointner, G., Knödlseder, J., Skinner, G. K., Von Ballmoos, P., ...
Bode, M.F., O'Brien, T.J., Osborne, Julian P., Page, Kim L., Senziani, F., Skinner, G.K., ...
The definitive version of this paper is available from http://www.journals.uchicago.edu/ApJ/journal/issues/ApJ/v652n1/65145/65145.html
Bode, M. F., O'Brien, T. J., Osborne, J. P., Page, K. L., Senziani, F., Skinner, G. K., ...
RS Ophiuchi began its latest outburst on 2006 February 12. Previous outbursts have indicated that high velocity ejecta interact with a pre-existing red giant wind, setting up shock systems analogous...
Gamma Ray Fresnel lenses - why not? (2006)
Fresnel lenses offer the possibility of concentrating the flux of X-rays or gamma-rays flux falling on a geometric area of many square metres onto a focal point which need only be a millimetre or so...
Weidenspointner, G., Shrader, C. R., Knoedlseder, J., Jean, P., Lonjou, V., Guessoum, N., ...
We present a measurement of the sky distribution of positronium (Ps) annihilation continuum emission obtained with the SPI spectrometer on board ESA's INTEGRAL observatory. The only sky region from...
Swift observations of Swift J0911.2+4533 (2006)
Grupe, D., Tueller, J., Markwardt, C., Kennea, J. A., Falcone, A., Mushotzky, R., ...
The Swift/BAT High Latitude Survey: First Results (2005)
Markwardt, C. B., Tueller, J., Skinner, G. K., Gehrels, N., Barthelmy, S. D., Mushotzky, R. F.
We present preliminary results from the first 3 months of the Swift BAT high galactic latitude survey in the 14--195 keV band. The survey reaches a flux of \~10^{-11} erg/cm^2/s and has ~2.7' (90%...
On the high coherence of kilo-Hz Quasi-Periodic Oscillations (2005)
Barret, D., Kluzniak, W., Olive, J. F., Paltani, S., Skinner, G. K.
We have carried out a systematic study of the properties of the kilo-Hertz quasi-periodic oscillations (QPO) observed in the X-ray emission of the neutron star low-mass X-ray binary 4U1608-52, using...
Future X-ray timing missions (2005)
Barret, D., Skinner, G. K., Staubert, R., Stella, L.
Thanks to the Rossi X-ray Timing Explorer (RXTE), it is now widely recognized that fast X-ray timing can be used to probe strong gravity fields around collapsed objects and constrain the equation of...
Lonjou, V., Knodlseder, J., Roques, J. P., Skinner, G. K., Von Ballmoos, P., Jean, P., ...
The status of the SPI energy calibration after the first year of INTEGRAL operations is reported. We have studied the gain variations and we have demonstrated that the most important parameter is the...
INTEGRAL SPI limits on electron-positron annihilation radiation from the galactic plane (2005)
Teegarden, B. J., Watanabe, K., Jean, P., Knödlseder, J., Lonjou, V., Roques, J. P., ...
The INTEGRAL spectrometer SPI: performance of point-source data analysis (2005)
Dubath, P., Knödlseder, J., Skinner, G. K., Connell, P., Kreykenbohm, I., Strong, A., ...
On the high coherence of kilo-Hz Quasi-Periodic Oscillations (2004)
Barret, D., Kluzniak, W., Olive, J. F., Paltani, S., Skinner, G. K.
We have carried out a systematic study of the properties of the kilo-Hertz quasi-periodic oscillations (QPO) observed in the X-ray emission of the neutron star low-mass X-ray binary 4U1608-52, using...
Rapid variability of the kHz-QPO frequency in 4U1608-52 (2004)
Paltani, S., Barret, D., Olive, J. F., Skinner, G. K.
We investigate the variability of the QPO frequency in 4U1608-52 on very short time scales of a few seconds. We detect changes in frequency as fast as 0.5 Hz/s, which is more than ten times the...
Lonjou, V., Weidenspointner, G., Knodlseder, J., Jean, P., Allain, M., Von Ballmoos, P., ...
The status of the analysis of the electron/positron annihilation radiation performed by INTEGRAL/SPI in the 4th GALACTIC QUADRANT is reported. We use data from the first two Galactic Center Deep...
INTEGRAL/SPI Limits on Electron-Positron Annihilation Radiation from the Galactic Plane (2004)
Teegarden, B. J., Watanabe, K., Jean, P., Knodlseder, J., Lonjou, V., Roques, J. P., ...
The center of our Galaxy is a known strong source of electron-positron 511-keV annihilation radiation. Thus far, however, there have been no reliable detections of annihilation radiation outside of...
Weidenspointner, G., Lonjou, V., Knoedlseder, J., Jean, P., Allain, M., Von Ballmoos, P., ...
During its first year in orbit the INTEGRAL observatory performed deep exposures of the Galactic Center region and scanning observations of the Galactic plane. We report on the status of our analysis...
The INTEGRAL/SPI response and the Crab observations (2004)
Sizun, P., Shrader, C. R., Attié, D., Dubath, P., Schanne, S., Cordier, B., ...
The Crab region was observed several times by INTEGRAL for calibration purposes. This paper aims at underlining the systematic interactions between (i) observations of this reference source, (ii)...
The INTEGRAL/SPI response and the Crab observations (2004)
Sizun, P., Shrader, C. R., Attié, D., Dubath, P., Schanne, S., Cordier, B., ...
The Crab region was observed several times by INTEGRAL for calibration purposes. This paper aims at underlining the systematic interactions between (i) observations of this reference source, (ii)...
The INTEGRAL/SPI response and the Crab observations (2004)
Sizun, P., Shrader, C. R., Attie, D., Dubath, P., Schanne, S., Cordier, B., ...
The Crab region was observed several times by INTEGRAL for calibration purposes. This paper aims at underlining the systematic interactions between (i) observations of this reference source, (ii)...
On the high coherence of kilo-Hz Quasi-Periodic Oscillations (2004)
Barret, D., Kluzniak, W., Olive, J. F., Paltani, S., Skinner, G. K.
We have carried out a systematic study of the properties of the kilo-Hertz quasi-periodic oscillations (QPO) observed in the X-ray emission of the neutron star low-mass X-ray binary 4U1608-52, using...
On the high coherence of kilo-Hz Quasi-Periodic Oscillations (2004)
Barret, D., Kluzniak, W., Olive, J. F., Paltani, S., Skinner, G. K.
We have carried out a systematic study of the properties of the kilo-Hertz quasi-periodic oscillations (QPO) observed in the X-ray emission of the neutron star low-mass X-ray binary 4U1608-52, using...
The INTEGRAL/SPI response and the Crab observations (2004)
Sizun, Patrick, Shrader, C. R., Attié, D., Dubath, P., Schanne, S., Cordier, B., ...
The Crab region was observed several times by INTEGRAL for calibration purposes. This paper aims at underlining the systematic interactions between (i) observations of this reference source, (ii)...
Status of the 511 keV line from the Galactic Centre region (2004)
Jean, P., Ballmoos, P. Von, Knödlseder, J., Lonjou, V., Weidenspointner, G., Skinner, G. K., ...
Performance of SPI point-source data analaysis (2004)
Dubath, Pierre, Kreykenbohm, I., Knödlseder, J., Connell, P., Skinner, G. K., Strong, A., ...
The INTEGRAL/SPI response and the Crab observations (2004)
Sizun, Patrick, Shrader, C. R., Attié, D., Dubath, P., Schanne, S., Cordier, B., ...
The Crab region was observed several times by INTEGRAL for calibration purposes. This paper aims at underlining the systematic interactions between (i) observations of this reference source, (ii)...
Early SPI/INTEGRAL measurements of galactic 511 keV line emission from positron annihilation (2003)
Jean, P., Knoedlseder, J., Lonjou, V., Allain, M., Skinner, G. K., ...
We report the first measurements of the 511 keV line emission from the Galactic Centre (GC) region performed with the spectrometer SPI on the space observatory INTEGRAL (International Gamma-Ray...
Knodlseder, J., Lonjou, V., Jean, P., Allain, M., Mandrou, P., ...
We provide first constraints on the morphology of the 511 keV line emission from the galactic centre region on basis of data taken with the spectrometer SPI on the INTEGRAL gamma-ray observatory. The...
The Spiros imaging software for the Integral SPI spectrometer (2003)
Skinner, G. K., Connell, P. H.
A key tool in the package of software available for the analysis of data from the SPI spectrometer of Integral is the SPIROS system developed at the University of Birmingham. Although intended...
The concept of coded mask imaging in theory and in practice is reviewed, with particular emphasis on image reconstruction techniques. The techniques are simple in principle but become more...
Proposal to do fast x-ray timing with XEUS (2003)
Staubert, R., Kendziorra, E., Barret, D., Skinner, G. K., Lechner, P., Stroeder, L., ...
SPI instrumental background characteristics (2003)
Jean, P., Vedrenne, G., Roques, J.P., Schonfelder, V., Teegarden, B.J., Von Kienlin, A., ...
In its space environment the INTEGRAL observatory is subject to an intense irradiation by energetic cosmic-ray particles that leads, via nuclear interactions with the telescope and spacecraft...
A proposal to do fast X-ray timing with XEUS (2003)
Staubert, R., Kendziorra, E., Barret, D., Skinner, G. K., Lechner, P., Strüder, L., ...
Early SPI/INTEGRAL measurements of 511 keV line emission from the 4th quadrant of the Galaxy (2003)
Jean, P., Knödlseder, J., Lonjou, V., Allain, M., Skinner, G. K., ...
SPI instrumental background characteristics (2003)
Jean, P., Vedrenne, G., Roques, J. P., Schönfelder, V., Teegarden, B. J., Kienlin, A. Von, ...
SPI instrumental background characteristics (2003)
Jean, P., Vedrenne, G., Roques, J.P., Schonfelder, V., Teegarden, B.J., Von Kienlin, A., ...
In its space environment the INTEGRAL observatory is subject to an intense irradiation by energetic cosmic-ray particles that leads, via nuclear interactions with the telescope and spacecraft...
SPI instrumental background characteristics (2003)
Jean, P., Vedrenne, G., Roques, J.P., Schonfelder, V., Teegarden, B.J., Von Kienlin, A., ...
In its space environment the INTEGRAL observatory is subject to an intense irradiation by energetic cosmic-ray particles that leads, via nuclear interactions with the telescope and spacecraft...
Long-term Mir-Kvant observations of the transient X-ray burster KS 1731-260 (2002)
Aleksandrovich, N. L., Revnivtsev, M. G., Aref'ev, V. A., Sunyaev, R. A., Skinner, G. K.
We present the observations of the X-ray burster KS 1731-260 from 1988 until 1999 with the Kvant/TTM telescope supplemented with published data from the ASM and PCA instruments of the RXTE...
A fast X-ray timing capability on XEUS (2002)
Barret, D., Skinner, G. K., Kendziorra, E., Staubert, R., Lechner, P., Strüder, L., ...
Future X-Ray Timing Missions (2001)
Klis, M. Van Der, Barret, D., Skinner, G. K., Staubert, R., Stella, L.
Future X-ray timing missions (2000)
Barret, D., Skinner, G. K., Staubert, R., Stella, L.
Thanks to the Rossi X-ray Timing Explorer (RXTE), it is now widely recognized that fast X-ray timing can be used to probe strong gravity fields around collapsed objects and constrain the equation of...
Future X-ray timing missions (2000)
Barret, D., Skinner, G. K., Staubert, R., Stella, L.
Thanks to the Rossi X-ray Timing Explorer (RXTE), it is now widely recognized that fast X-ray timing can be used to probe strong gravity fields around collapsed objects and constrain the equation of...
Future X-ray timing missions (2000)
Barret, D., Skinner, G. K., Staubert, R., Stella, L.
Thanks to the Rossi X-ray Timing Explorer (RXTE), it is now widely recognized that fast X-ray timing can be used to probe strong gravity fields around collapsed objects and constrain the equation of...
Hard X-ray Emission From Low Mass X-ray Binaries (1999)
Barret, D., Olive, J. F., Boirin, L., Done, C., Skinner, G. K., Grindlay, J. E.
We report on Rossi X-ray Timing Explorer observations of four type I X-ray bursters; namely 1E1724-3045, GS1826-238, SLX1735-269 and KS1731-260. The first three were in a low state (LS) whereas...
The X-ray Nova GRS 1739-278 near the Galactic Center (1999)
Borozdin, K. N., Revnivtsev, M. G., Trudolyubov, S. P., Aleksandrovich, N. L., Sunyaev, R. A., Skinner, G. K.
The soft X-ray nova GRS 1739-278 flared up in 1996 near the Galactic center. We present the observations of this interesting source, a black-hole candidate, with the instruments on board the...
Proposed (to) EXIST: Hard X-ray Imaging All Sky Survey/Monitor (1997)
Grindlay, J. E., Prince, T. A., Harrison, F., Gehrels, N., Hailey, C. J., Ramsey, B., ...
The hard x-ray (10-600 keV) sky is inherently time variable and yet has neither been surveyed nor monitored with a sensitive imaging telescope. The Energetic X-ray Imaging Survey Telescope (EXIST) is...
X-ray Spectrum of the Black Hole Candidate X1755-338 (1995)
Pan, H. C., Skinner, G. K., Sunyaev, R. A., Borozdin, K. N.
We report the first detection of a hard power-law tail in the X-ray spectrum of the black hole candidate (BHC) binary X1755-338, which was observed in 1989 March-September during the TTM Galactic...
Soccer matches as experiments: how often does the 'best' team win?
Models in which the number of goals scored by a team in a soccer match follow a Poisson distribution, or a closely related one, have been widely discussed. We here consider a soccer match as an...