Peter Kretschmar's INTEGRAL Publications upto 2006
author
Smithsonian/NASA ADS ADS arXiv e-prints
Abstract Service preprints
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Title:
The INTEGRAL Galactic bulge monitoring program: the first 1.5 years
Authors:
Kuulkers, E.:author;
Shaw, S. E.:author;
Paizis, A.:author;
Chenevez, J.:author;
Brandt, S.:author;
Courvoisier, T. J. -L.:author;
Domingo, A.:author;
Ebisawa, K.:author;
Kretschmar, P.:author;
Markwardt, C. B.:author;
Mowlavi, N.:author;
Oosterbroek, T.:author;
Orr, A.:author;
Risquez, D.:author;
Sanchez-Fernandez, C.:author;
Wijnands, R.:authorPublication:
eprint arXiv:astro-ph/0701244
Publication Date:
01/2007
Origin:
ARXIV
Keywords:
Astrophysics
Comment:
27 pages, 42 figures, accepted for publication in A&A. Abstract
abridged. Tables 3,4,6,7 appear at the end. Images have been compressed
and are reduced in quality; original PostScript images can be retrieved
from http://isdc.unige.ch/~kuulkers/bulge/
Bibliographic Code:
2007astro.ph..1244K
Abstract
The Galactic bulge region is a rich host of variable high-energy point
sources. Since 2005, February 17 we are monitoring the source activity
in this region about every three days with INTEGRAL. Thanks to the large
field of view, the imaging capabilities and the sensitivity at hard
X-rays, we are able to present for the first time a detailed homogeneous
(hard) X-ray view of a sample of 76 sources in the Galactic bulge
region. We describe the successful monitoring program and show the first
results for a period of about one and a half year. We focus on the short
(hour), medium (month) and long-term (year) variability in the 20-60 keV
and 60-150 keV bands. When available, we discuss the simultaneous
observations in the 3-10 keV and 10-25 keV bands. Per visibility season
we detect 32/33 sources in the 20-60 keV band and 8/9 sources in the
60-150 keV band. On average, we find per visibility season one active
bright (>~100 mCrab, 20-60 keV) black-hole candidate X-ray transient and
three active weaker (<~25 mCrab, 20-60 keV) neutron star X-ray
transients. Most of the time a clear anti-correlation can be seen
between the soft and hard X-ray emission in some of the X-ray bursters.:
Hard X-ray flares or outbursts in X-ray bursters, which have a duration
of the order of weeks, are accompanied by soft X-ray drops. On the other
hand, hard X-ray drops can be accompanied by soft X-ray
flares/outbursts. We found a number of new sources, IGR J17354-3255, IGR
17453-2853, IGR J17454-2703, IGR J17456-2901b, IGR J17536-2339, and IGR
J17541-2252. We report here on some of the high-energy properties of
these sources. The high-energy light curves of all the sources in the
field of view, and the high-energy images of the region, are made
available through the WWW at http://isdc.unige.ch/Science/BULGE/.:
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Title:
INTEGRAL observations of the cosmic X-ray background in the 5-100 keV
range via occultation by the Earth
Authors:
Churazov, E.:author;
Sunyaev, R.:author;
Revnivtsev, M.:author;
Sazonov, S.:author;
Molkov, S.:author;
Grebenev, S.:author;
Winkler, C.:author;
Parmar, A.:author;
Bazzano, A.:author;
Falanga, M.:author;
Gros, A.:author;
Lebrun, F.:author;
Natalucci, L.:author;
Ubertini, P.:author;
Roques, J. -P.:author;
Bouchet, L.:author;
Jourdain, E.:author;
Knoedlseder, J.:author;
Diehl, R.:author;
Budtz-Jorgensen, C.:author;
Brandt, S.:author;
Lund, N.:author;
Westergaard, N. J.:author;
Neronov, A.:author;
Turler, M.:author;
Chernyakova, M.:author;
Walter, R.:author;
Produit, N.:author;
Mowlavi, N.:author;
Mas-Hesse, J. M.:author;
Domingo, A.:author;
Gehrels, N.:author;
Kuulkers, E.:author;
Kretschmar, P.:author;
Schmidt, M.:authorPublication:
eprint arXiv:astro-ph/0608250
Publication Date:
08/2006
Origin:
ARXIV
Keywords:
Astrophysics
Comment:
Submitted to A&A, 13 pages, 12 figues
Bibliographic Code:
2006astro.ph..8250C
Abstract
We study the spectrum of the cosmic X-ray background (CXB) in energy
range $\sim$5-100 keV. Early in 2006 the INTEGRAL observatory performed
a series of four 30ksec observations with the Earth disk crossing the
field of view of the instruments. The modulation of the aperture flux
due to occultation of extragalactic objects by the Earth disk was used
to obtain the spectrum of the Cosmic X-ray Background(CXB). Various
sources of contamination were evaluated, including compact sources,
Galactic Ridge emission, CXB reflection by the Earth atmosphere, cosmic
ray induced emission by the Earth atmosphere and the Earth auroral
emission. The spectrum of the cosmic X-ray background in the energy band
5-100 keV is obtained. The shape of the spectrum is consistent with that
obtained previously by the HEAO-1 observatory, while the normalization
is $\sim$10% higher. The CXB spectrum obtained by INTEGRAL agrees well
with the measurements of RXTE/PCA, the latest recalculation of HEAO-1
measurements and ASCA and CHANDRA observations. The increase relative to
the earlier adopted value of the absolute flux of the CXB near the
energy of maximum luminosity (20-50 keV) has direct implications for the
energy release of supermassive black holes in the Universe and their
growth at the epoch of the CBX origin.:
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Title:
JEM-X: three years in space
Authors:
Budtz-Jørgensen, C.:author;
Lund, N.:author;
Westergaard, N. J.:author;
Brandt, S.:author;
Oxborrow, C. A.:author;
Chenevez, J.:author;
Rasmussen, I. Lundgaard: author;
Laursen, S.:author;
Pedersen, S. M.:author;
Polny, J.:author;
Kretschmar, P.:author;
Vilhu, O.:author;
Feroci, M.:author;
Frontera, F.:author;
Juchnikowski, G.:author;
Reglero, V.:author;
MartÃnez-Núnez, S.:author;
Larsson, S.:author;
Zdziarski, A.:author;
Fahmy, S.:author;Affiliation:
AA(Danish National Space Ctr. (Denmark)), AB(Danish National Space Ctr.:(Denmark)), AC(Danish National Space Ctr. (Denmark)), AD(Danish National
Space Ctr. (Denmark)), AE(Danish National Space Ctr. (Denmark)),
AF(Danish National Space Ctr. (Denmark)), AG(Danish National Space Ctr.:(Denmark)), AH(Danish National Space Ctr. (Denmark)), AI(Danish National
Space Ctr. (Denmark)), AJ(Danish National Space Ctr. (Denmark)),
AK(European Space Astronomy Ctr. (Spain)), AL(Univ. of Helsinki
(Finland)), AM(Instituto de Astrofisica CNR (Italy)), AN(Univ. of
Ferrara (Italy)), AO(Space Research Ctr. (Poland)), AP(Univ. of Valencia
(Spain)), AQ(Univ. of Valencia (Spain)), AR(Stockholm Observatory
(Sweden)), AS(Copernicus Astronomical Ctr. (Poland)), AT(European Space
Operations Ctr. (Germany))
Publication:
Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray.:Edited by Turner, Martin J. L.; Hasinger, Günther. Proceedings of the
SPIE, Volume 6266, pp. (2006). (SPIE Homepage SPIEhomepage)
Publication Date:
07/2006
Origin:
SPIE
Abstract Copyright:
(c) 2006: SPIE--The International Society for Optical Engineering.:Downloading of the abstract is permitted for personal use only.:DOI:
10.1117/12.672762 DOI
Bibliographic Code:
2006SPIE.6266E..87B
Abstract
We report on the technical and scientific performance of JEM-X, the
X-ray monitor on ESA's INTEGRAL mission. INTEGRAL has now been in orbit
for more than three years, and the mission is foreseen to be extended
until the end of 2010. Overall, JEM-X performs very well, and can be
expected to continue to do so for the duration of the mission. We
discuss in some detail the operational experiences and the problems
encountered with the microstrip detectors caused by the space
environment and give one example of the interesting scientific results
obtained. The analysis software is still being improved on, and we
discuss briefly the significance of these improvements.:
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Title:
The INTEGRAL Galactic Bulge monitoring program
Authors:
Kuulkers, E.:author;
Shaw, S. E.:author;
Brandt, S.:author;
Chenevez, J.:author;
Courvoisier, T. J.-L.:author;
Ebisawa, K.:author;
Kretschmar, P.:author;
Markwardt, C. B.:author;
Mowlavi, N.:author;
Oosterbroek, T.:author;
Orr, A.:author;
Paizis, A.:author;
Sanchez-Fernandez, C.:author;
Wijnands, R.:author;Publication:
The Transient Milky Way: A Perspective for MIRAX, AIP Conference
Proceedings, Vol. 840, held in Sao Jose dos Campos (Brazil), 7-9
December 2005. Edited by J. Braga, F. D'Amico, and R.E. Rothschild.:Melville, NY: American Institute of Physics, 2006., p.30-34 (AIPC
Homepage homepage)
Publication Date:
06/2006
Origin:
ADS link
Bibliographic Code:
2006AIPC..840...30K
Abstract
The Galactic Bulge region is a rich host of variable high-energy point
sources. These sources include bright and relatively faint X-ray
transients, X-ray bursters, persistent neutron star and black-hole
candidate binaries, X-ray pulsars, etc.. We have a program to monitor
the Galactic Bulge region regularly and frequently with the gamma-ray
observatory INTEGRAL. As a service to the scientific community the
high-energy light curves of all the active sources as well as images of
the region are made available through the WWW. We show the first results
of this exciting new program.:
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Title:
Observation of V0332+53 over the 2004/2005 outburst with INTEGRAL
Authors:
Kreykenbohm, I.:author;
Mowlavi, N.:author;
Pottschmidt, K.:author;
Wilms, J.:author;
Shaw, S. E.:author;
Rothschild, R. E.:author;
Produit, N.:author;
Coburn, W.:author;
Kretschmar, P.:author;
Santangelo, A.:author;
Staubert, R.:author;
Publication:
In: Proceedings of the "The X-ray Universe 2005", 26-30 September 2005,
El Escorial, Madrid, Spain. Ed. by A. Wilson. ESA SP-604, Volume 1,
Noordwijk: ESA Publications Division, ISBN 92-9092-915-4, 2006, p. 275 - 276
Publication Date:
01/2006
Origin:
ARI link
Keywords:
Pulsars, Stars: Magnetic Fields
Abstract Copyright:
ESA
Bibliographic Code:
2006xru..conf..275K
Abstract
We present the spectral and temporal analysis of the 2004/2005 outburst
of the transient X-ray pulsar V0332+53 as observed with INTEGRAL. After
the discovery of the third cyclotron line in phase averaged spectra
(Kreykenbohm et al., 2005; Pottschmidt et al., 2005), detailed pulse
phase spectroscopy revealed remarkably little variability of the
cyclotron lines through the 4.4 s X-ray pulse (Pottschmidt et al.,
2005). During the decline of the outburst, the flux was observed to
decay exponentially until 2005 Feb 10 and linearly thereafter. The
spectrum was found to become harder with time, while the folding energy
remained constant. The energy of the fundamental cyclotron line
increased with time from 26.5 keV in the RXTE observation up to 29.5 keV
in the last INTEGRAL one indicating that the emission region is moving
closer to the surface of the neutron star.:
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Title:
3A 0535+262 in outburst
Authors:
Kretschmar, P.:author;
Pottschmidt, K.:author;
Ferrigno, C.:author;
Kreykenbohm, I.:author;
Domingo, A.:author;
Wilms, J.:author;
Rothschild, R.:author;
Coburn, W.:author;
Kendziorra, E.:author;
Staubert, R.:author;
Schönherr, G.:author;
Santangelo, A.:author;
Segreto, A.:author;
Publication:
In: Proceedings of the "The X-ray Universe 2005", 26-30 September 2005,
El Escorial, Madrid, Spain. Ed. by A. Wilson. ESA SP-604, Volume 1,
Noordwijk: ESA Publications Division, ISBN 92-9092-915-4, 2006, p. 273 - 274
Publication Date:
01/2006
Origin:
ARI link
Keywords:
X-Rays: Binaries, Stars: Magnetic Fields
Abstract Copyright:
ESA
Bibliographic Code:
2006xru..conf..273K
Abstract
The Be/X-ray binary 3A 0535+262 has the highest magnetic field
determined by cyclotron line studies of all accreting X-ray pulsars,
despite an open debate if the fundamental line was rather at 50 or above
100 keV as observed by different instruments in past outbursts. The
source went into quiescence for more than ten years since its last
outbursts in 1994. Observing during a "normal" outburst August/September
2005 with Integral and RXTE we find a strong cyclotron line feature at
~45 keV and have for the first time since 1975 determined the low energy
pulse profile.:
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Title:
INTEGRAL observations of the region of the supernova remnant IC443.:Authors:
Bocchino, F.:author;
Krassilchtchikov, A. M.:author;
Kretschmar, P.:author;
Bykov, A. M.:author;
Uvarov, Yu. A.:author;
Osipov, S. M.:author;
Publication:
36th COSPAR Scientific Assembly. Held 16 - 23 July 2004, in Beijing,
China., p.2026
Publication Date:
00/2006
Origin:
ADS link
Bibliographic Code:
2006cosp...36.2026B
Abstract
IC433 is a supernova remnant SNR interacting with a molecular cloud The
field of IC443 also contains an unidentified gamma-ray source 3EG J0617
2238 Recent observations with XMM-Newton and Chandra have revealed a
number of hard X-ray sources in the field of the extended SNR including
a pulsar wind nebula and an enigmatic hard X-ray source in the SNR --
molecular cloud interaction region We present preliminary results from
INTEGRAL observations of IC443 Several sources have been detected by
Jem-X both in the 3-10 and 10-35 keV band among which the PWN We discuss
the relation between the Jem-X sources the detected XMM Chandra X-ray
sources and the EGRET source 3EG J0617 2238
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Title:
Spectral behaviour of an INTEGRAL sample of black hole candidates:
Initial results
Authors:
On Behalf Of A Large Group Of Scientists Involved in The Weak Bhc Topic
author;
Bazzano, A.:author;
Capitanio, F.:author;
Cesare, G. De
author;
Santo, M. Del
author;
Natalucci, L.:author;
Tarana, A.:author;
Roques, J. P.:author;
Joinet, A.:author;
Jourdain, E.:author;
Kretschmar, P.:author;
Zdziarski, A. A.:author;
Dean, A. J.:author;
Barlow, E. J.:author;
Cadolle Bel, M.:author;
Goldwurm, A.:author;Affiliation:
AA(Istituto di Astrofisica Spaziale e Fisica Cosmica, INAF, Via Fosso
del Cavaliere 100, 00133-Rome, Italy), AB(Istituto di Astrofisica
Spaziale e Fisica Cosmica, INAF, Via Fosso del Cavaliere 100,
00133-Rome, Italy), AC(Istituto di Astrofisica Spaziale e Fisica
Cosmica, INAF, Via Fosso del Cavaliere 100, 00133-Rome, Italy),
AD(Istituto di Astrofisica Spaziale e Fisica Cosmica, INAF, Via Fosso
del Cavaliere 100, 00133-Rome, Italy), AE(Istituto di Astrofisica
Spaziale e Fisica Cosmica, INAF, Via Fosso del Cavaliere 100,
00133-Rome, Italy), AF(Istituto di Astrofisica Spaziale e Fisica
Cosmica, INAF, Via Fosso del Cavaliere 100, 00133-Rome, Italy),
AG(Centre dâ??Etude Spatiale des Rayonne Â? av. du Colonel Roche, 9 Â? 31029
Toulouse, France), AH(Centre dâ??Etude Spatiale des Rayonne Â? av. du
Colonel Roche, 9 Â? 31029 Toulouse, France), AI(Centre dâ??Etude Spatiale
des Rayonne Â? av. du Colonel Roche, 9 Â? 31029 Toulouse, France),
AJ(INTEGRAL Science Data Centre, Chemin dâ??Ã?cogia 16, 1290 Versoix,
Switzerland), AK(Centrum Astronomiczne im. M. Kopernika, Bartycka 18,
00-716 Warszawa, Poland), AL(Department of Physics and Astronomy,
Southampton University, SO17 1BJ Southampton, UK), AM(Department of
Physics and Astronomy, Southampton University, SO17 1BJ Southampton,
UK), AN(Centre dâ??Ã?tudes de Saclay, DAPNIA/Service dâ??Astrophyisique, Orme
des Merisiers, 91191 Gif-sur-Yvette, France), AO(Centre dâ??Ã?tudes de
Saclay, DAPNIA/Service dâ??Astrophyisique, Orme des Merisiers, 91191
Gif-sur-Yvette, France)
Publication:
Advances in Space Research, Volume 38, Issue 7, p. 1369-1373. (AdSpR
Homepage homepage)
Publication Date:
00/2006
Origin:
ELSEVIER
Abstract Copyright:
COSPAR
DOI:
10.1016/j.asr.2005.04.023 link
Bibliographic Code:
2006AdSpR..38.1369O
Abstract
In this paper, we present the spectral characteristics of a sample of
Black Hole Candidates observed with the IBIS, SPI and JEM-X instruments
on board the INTEGRAL Gamma-ray Observatory. This work is part of the
long term, systematic, spectral study programme of intermediate
intensity BHC (<500 mCrab) within the INTEGRAL Core Programme
observations. The basic data set is from Galactic Plane Scan (GPS) and
Galactic Centre Deep Exposure (GCDE), collected from the beginning of
the Integral scientific observation programme. We will address in
particular the behaviour of IGR J17464-3213, 1E 1740.7-294 and XTE
J1720-318.:
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Title:
A large spin-up rate measured with INTEGRAL in the high mass X-ray
binary pulsar SAX J2103.5+4545
Authors:
Sidoli, L.:author;
Mereghetti, S.:author;
Larsson, S.:author;
Chernyakova, M.:author;
Kreykenbohm, I.:author;
Kretschmar, P.:author;
Paizis, A.:author;
Santangelo, A.:author;
Ferrigno, C.:author;
Falanga, M.:author;Affiliation:
AA(Istituto di Astrofisica Spaziale e Fisica Cosmica - Sezione di Milano
- IASF/INAF, 20133 Milano, Italy sidoli@mi.iasf.cnr.it), AB(Istituto di
Astrofisica Spaziale e Fisica Cosmica - Sezione di Milano - IASF/INAF,
20133 Milano, Italy), AC(Department of Astronomy, Stockholm University,
10691 Stockholm, Sweden), AD(INTEGRAL Science Data Center, 1290 Versoix,
Switzerland), AE(Institut für Astronomie und Astrophysik - Astronomie,
Univ. of Tübingen, 72076 Tübingen, Germany ; INTEGRAL Science Data
Center, 1290 Versoix, Switzerland), AF(ESA - European Space Astronomy
Center, 28080 Villafranca del Castillo, Spain ; INTEGRAL Science Data
Center, 1290 Versoix, Switzerland), AG(Istituto di Astrofisica Spaziale
e Fisica Cosmica - Sezione di Milano - IASF/INAF, 20133 Milano, Italy;
INTEGRAL Science Data Center, 1290 Versoix, Switzerland), AH(Institut
für Astronomie und Astrophysik - Astronomie, Univ. of Tübingen, 72076
Tübingen, Germany), AI(Istituto di Astrofisica Spaziale e Fisica Cosmica
- Sezione di Palermo - IASF/INAF, 90146 Palermo, Italy), AJ(CEA Saclay,
DSM/DAPNIA/Service d'Astrophysique (CNRS FRE 2591), 91191
Gif-sur-Yvette, France)
Publication:
Astronomy and Astrophysics, Volume 440, Issue 3, September IV 2005,
pp.1033-1039 (A&A Homepage homepage)
Publication Date:
09/2005
Origin:
EDP
Keywords:
X-rays: individuals: SAX J2103.5+4545, X-rays: binaries, stars: neutron,
accretion, accretion disks
DOI:
10.1051/0004-6361:20052961 link
Bibliographic Code:
2005A&A...440.1033S
Abstract
The High Mass X-ray Binary Pulsar SAX J2103.5+4545 has been observed
with INTEGRAL several times during the last outburst in 2002-2004. We
report a comprehensive study of all INTEGRAL observations, allowing a
study of the pulse period evolution during the recent outburst. We
measured a very rapid spin-up episode, lasting 130 days, which decreased
the pulse period by 1.8 s. The spin-up rate, dot{P} -1.5 Ã? 10-7 s s-1,
is the largest ever measured for SAX J2103.5+4545, and it is among the
fastest for an accreting pulsar. The pulse profile shows evidence for
temporal variability, apparently not related to the source flux or to
the orbital phase. The X-ray spectrum is hard and there is significant
emission up to 150 keV. A new derivation of the orbital period, based on
RXTE data, is also reported.:
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