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7 results on '"JEM-X"'

1. JEM–X inflight performance

Author

A. A. Zdziarski, C. Gomez, M. Morawski, Osmi Vilhu, E. Morelli, Niels Lund, Niels Jørgen Stenfeldt Westergaard, K. H. Andersen, G. Giulianelli, S. Maisala, R. Carli, Enrico Costa, G. Sarri, J. Polny, S. Larrson, T. Andersson, K. Omø, M. Rezazad, R. Much, Carl Budtz-Jørgensen, S. Laursen, Victor Reglero, A. Rubini, Juhani Huovelin, S. Martínez Núñez, M. Feroci, G. Juchnikowski, V. Carassiti, Carol Anne Oxborrow, P. L. Jensen, A. J. Castro-Tirado, Massimo Rapisarda, Allan Hornstrup, Herbert W. Schnopper, Peter Kretschmar, Astrid Orr, F. Cordero, Michael Schmidt, C. Pelliciari, Jérôme Chenevez, Filippo Frontera, M. Goria, G. Loffredo, Ib Lundgaard Rasmussen, H. Andersson, Søren Møller Pedersen, R. Svensson, Søren Brandt, and P. A. Jensen

Subjects
Physics, Instrumentation: detectors, X-rays: general, 010308 nuclear & particles physics, Detectors, X–rays, JEM-X, Astronomy and Astrophysics, UNESCO::ASTRONOMÍA Y ASTROFÍSICA, ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO], 01 natural sciences, Space and Planetary Science, 0103 physical sciences, Calibration, UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia, 010303 astronomy & astrophysics, ASTRONOMÍA Y ASTROFÍSICA [UNESCO], Remote sensing
Abstract

We summarize the inflight performance of JEM-X, the X-ray monitor on the INTEGRAL mission during the initial ten months of operations. The JEM-X instruments have now been tuned to stable operational conditions. The performance is found to be close to the pre-launch expectations. The ground calibrations and the inflight calibration data permit to determine the instruments characteristics to fully support the scientific data analysis. Reglero Velasco, Victor, Victor.Reglero@uv.es ; Martinez Nuñez, Silvia, Silvia.Martinez@uv.es

Published
2003
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2. JEM–X science analysis software

Author

S. Maisala, Juhani Huovelin, Niels Lund, I. L. Rasmussen, S. Brandt, S. Martínez Núñez, C. A. Oxborrow, Niels J. Westergaard, Carl Budtz-Jørgensen, Stefan Larsson, Allan Hornstrup, and Peter Kretschmar

Subjects
Software, X-ray data analysis, INTEGRAL, Satellite, JEM-X, 010504 meteorology & atmospheric sciences, Astrophysics, UNESCO::ASTRONOMÍA Y ASTROFÍSICA, 01 natural sciences, 0103 physical sciences, Analysis software, 010303 astronomy & astrophysics, Selection (genetic algorithm), 0105 earth and related environmental sciences, Physics, business.industry, Astronomy and Astrophysics, computer.file_format, ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO], Computer engineering, Space and Planetary Science, Executable, UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia, business, computer, ASTRONOMÍA Y ASTROFÍSICA [UNESCO]
Abstract

The science analysis of the data from JEM-X on INTEGRAL is performed through a number of levels including corrections, good time selection, imaging and source finding, spectrum and light-curve extraction. These levels consist of individual executables and the running of the complete analysis is controlled by a script where parameters for detailed settings are introduced. The end products are FITS files with a format compatible with standard analysis packages such as XSPEC. Martinez Nuñez, Silvia, Silvia.Martinez@uv.es

Published
2003
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3. JEM-X: the x-ray monitor on INTEGRAL

Author

Marco Feroci, Josef Polny, A. A. Zdziarski, P. B. Mogensen, V. Collado, I. L. Rasmussen, Jose-Luis Requena, G. Loffredo, Fernando Cerdeira Pérez, Roland Svensson, Herbert W. Schnopper, Osmi Vilhu, J. Peris, K. Omoe, J. M. Rodrigo, Niels J. Westergaard, S. M. Pedersen, A. J. Castro-Tirado, K. Harpo Andersen, Carl Budtz-Jørgensen, C. A. Oxborrow, Veikko J. Kamarainen, Filippo Frontera, Carlo Pelliciari, S. Laursen, Jérôme Chenevez, Rene Engel Kristansen, Allan Hornstrup, V. Carassiti, Alda Rubini, S. Larsson, M. Morawski, Guido Zavattini, P. A. Jensen, E. Morelli, Victor Reglero, T. Andersson, Niels Lund, Enrico Costa, S. Brandt, Juhani Huovelin, G. Juchnikowski, and Alfredo Morbidini

Subjects
Physics::Instrumentation and Detectors, micro strip detector, Astrophysics::High Energy Astrophysical Phenomena, Field of view, X-ray telescope, 01 natural sciences, law.invention, Jem-X, INTEGRAL, X-ray astronimy, Telescope, Optics, law, 0103 physical sciences, Angular resolution, Coded aperture, 010303 astronomy & astrophysics, Image resolution, Physics, 010308 nuclear & particles physics, business.industry, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, business
Abstract

The INTEGRAL X-ray monitor, JEM-X, (together with the two gamma ray instruments, SPI and IBIS) provides simultaneous imaging with arcminute angular resolution in the 3-35 keV band. The good angular resolution and low energy response of JEM-X plays an important role in the detection and identification of gamma ray sources as well as in the analysis and scientific interpretation of the combined X-ray and gamma ray data. JEM-X is a coded aperture X-ray telescope consisting of two identical detectors. Each detector has a sensitive area of 500 cm2, and views the sky through its own coded aperture mask. The coded masks are located 3.4 m above the detector windows. The detector field of view is constrained by X-ray collimators (6.6° FOV, FWHM).

Published
2004
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4. JEM-X observations of the Be/X-ray binary EXO 2030+375

Author

S. Martínez Núñez, Pablo Reig, Peter Kretschmar, Niels Lund, Pere Blay, and Victor Reglero

Subjects
Physics, Range (particle radiation), EXO 2030+375, HMXRBs, INTEGRAL, X-ray binary, Astronomy, Static timing analysis, Astronomy and Astrophysics, Astrophysics, UNESCO::ASTRONOMÍA Y ASTROFÍSICA, ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO], Pulse (physics), Luminosity, Pulse period, Pulsar, Space and Planetary Science, BeX stars, JEM-X, Energy spectrum, UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia, ASTRONOMÍA Y ASTROFÍSICA [UNESCO]
Abstract

We have used data from the Joint European Monitor (JEM-X) to perform an X-ray spectral and timing analysis of the 42-s transient pulsar EXO 2030+375 during an X-ray outburst. X-ray pulsations are clearly detected with an average pulse period of 41:66 +- 0:05 s and an average pulse fraction of 60%. The profile of the energy spectrum did not change appreciably throughout the X-ray outburst, although the source shows a slightly softer spectrum during periastron passage in the energy range 9–25 keV. The 5–25 keV X-ray luminosity changed by a factor of 2 throughout the observations, reaching a maximum value of 3x10^36 erg s^−1. These observations allowed us to verify the in-flight instrumental properties of the JEM-X Monitor. Martinez Nuñez, Silvia, Silvia.Martinez@uv.es ; Reig Torres, Pablo, Pablo.Reig@uv.es ; Blay Serrano, Pedro Jose, Pere.Blay@uv.es ; Reglero Velasco, Victor, Victor.Reglero@uv.es

Published
2003

5. JEM-X: The X-ray monitor on INTEGRAL

Author

Flanagan, Kathryn A, Siegmund, Oswald H. W, Budtz-Jørgensen, Carl, Lund, Niels, Westergaard, Niels Jørgen Stenfeldt, Brandt, Søren Kristian, Hornstrup, Allan, Rasmussen, Ib Lundgaard, Laursen, Steen, Pedersen, S.M., Kristensen, R.E., Mogensen, P.B., Andersen, K.H., Polny, Jozef, Jensen, Poul Anker, Oxborrow, Carol Anne, Chenevez, Jérôme, Omoe, K., Kämäräinen, V.J., Andersson, Toke Bech, Vilhu, O.R., Huovelin, J., Costa, E., Feroci, M., Rubini, A., Morelli, E., Morbidini, A., Frontera, F., Pelliciari, C., Loffredo, G., Zavattini, G., Carassiti, V., Morawski, M., Juchnikowski, G., Reglero, V., Peris, J., Collado, V., Rodirgo, J.M., Perez, F., Requena, J.L., Larsson, S., Svensson, R., Zdziarski, A., Castro-Tirado, A.J., Schnopper, H.W., Flanagan, Kathryn A, Siegmund, Oswald H. W, Budtz-Jørgensen, Carl, Lund, Niels, Westergaard, Niels Jørgen Stenfeldt, Brandt, Søren Kristian, Hornstrup, Allan, Rasmussen, Ib Lundgaard, Laursen, Steen, Pedersen, S.M., Kristensen, R.E., Mogensen, P.B., Andersen, K.H., Polny, Jozef, Jensen, Poul Anker, Oxborrow, Carol Anne, Chenevez, Jérôme, Omoe, K., Kämäräinen, V.J., Andersson, Toke Bech, Vilhu, O.R., Huovelin, J., Costa, E., Feroci, M., Rubini, A., Morelli, E., Morbidini, A., Frontera, F., Pelliciari, C., Loffredo, G., Zavattini, G., Carassiti, V., Morawski, M., Juchnikowski, G., Reglero, V., Peris, J., Collado, V., Rodirgo, J.M., Perez, F., Requena, J.L., Larsson, S., Svensson, R., Zdziarski, A., Castro-Tirado, A.J., and Schnopper, H.W.

Abstract

The INTEGRAL X-ray monitor, JEM-X, (together with the two gamma ray instruments, SPI and IBIS) provides simultaneous imaging with arcminute angular resolution in the 3-35 keV band. The good angular resolution and low energy response of JEM-X plays an important role in the detection and identification of gamma ray sources as well as in the analysis and scientific interpretation of the combined X-ray and gamma ray data. JEM-X is a coded aperture X-ray telescope consisting of two identical detectors. Each detector has a sensitive area of 500 cm(2), and views the sky through its own coded aperture mask. The coded masks are located 3.4 m above the detector windows. The detector field of view is constrained by X-ray collimators (6.6degrees FOV, FWHM).

Published
2004

6. JEM-X observations of the Be/X-ray binary EXO 2030+375

Author

Nunez, S.M., Reig, P., Blay, P., Kretschmar, P., Lund, Niels, Reglero, V., Nunez, S.M., Reig, P., Blay, P., Kretschmar, P., Lund, Niels, and Reglero, V.

Abstract

We have used data from the Joint European Monitor (JEM-X) to perform an X-ray spectral and timing analysis of the 42-s transient pulsar EXO 2030+375 during an X-ray outburst. X-ray pulsations are clearly detected with an average pulse period of 41.66+/-0.05 s and an average pulse fraction of 60%. The profile of the energy spectrum did not change appreciably throughout the X-ray outburst, although the source shows a slightly softer spectrum during periastron passage in the energy range 9-25 keV. The 5-25 keV X-ray luminosity changed by a factor of 2 throughout the observations, reaching a maximum value of 3x10(36) erg s(-1). These observations allowed us to verify the in-flight instrumental properties of the JEM-X Monitor.

Published
2003

7. JEM-X science analysis software

Author

Westergaard, Niels Jørgen Stenfeldt, Kretschmar, P., Oxborrow, Carol Anne, Larsson, S., Huovelin, J., Maisala, S., Nunez, S.M., Lund, Niels, Hornstrup, Allan, Brandt, Søren Kristian, Budtz-Jørgensen, Carl, Rasmussen, Ib Lundgaard, Westergaard, Niels Jørgen Stenfeldt, Kretschmar, P., Oxborrow, Carol Anne, Larsson, S., Huovelin, J., Maisala, S., Nunez, S.M., Lund, Niels, Hornstrup, Allan, Brandt, Søren Kristian, Budtz-Jørgensen, Carl, and Rasmussen, Ib Lundgaard

Abstract

The science analysis of the data from JEM-X on INTEGRAL is performed through a number of levels including corrections, good time selection, imaging and source finding, spectrum and light-curve extraction. These levels consist of individual executables and the running of the complete analysis is controlled by a script where parameters for detailed settings are introduced. The end products are FITS files with a format compatible with standard analysis packages such as XSPEC.

Published
2003

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