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1661. http://hea.iki.rssi.ru/integral06/papers/F35_Joinet01-07Jun07_18:06:14.pdf
STUDY OF THE HIGH ENERGY EMISSION OF GX339-4 AND H1743-322 DURING STATE TRANSITIONS WITH INTEGRAL AND RXTE A. Joinet1 , E. Jourdain1 , J. Malzac1 , J. P. Roques1 , S. Corbel2 , J. Rodriguez2 , and E. ... /Universite Paris 7/CNRS), F-91191 Gif sur yvette, France Є 3 SabanciUniversity, Orhanli- Tuzla, Istanbul, 34956, Turkey ABSTRACT GX339-4 and H1743-322 are transient Galactic black holes which demonstrate a complex X and radio activity ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/F35_Joinet01-07Jun07_18:06:14.pdf -- 137.7 Кб -- 07.06.2007
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1662. http://hea.iki.rssi.ru/integral06/papers/H01_Yakovlev01-06Jun07_18:36:08.pdf
STRANGE OR EVEN STRANGER STARS? D. G. Yakovlev1 and P. Haensel 1 2 Ioffe Physico-Technical Institute, Politekhnicheskaya 26, 194021 Saint-Petersburg, Russia 2 Copernicus Astronomical Center, Bartycka 18, PL-00-716 Warsaw, Poland ABSTRACT We describe the physical principles underlying the hypotheses on the existence of compact stars composed of strange quark matter or even more exotic matter. ... Key words: compact stars; strange matter; Q-matter. them) are indeed neutron stars. ... STRANGER STARS? ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/H01_Yakovlev01-06Jun07_18:36:08.pdf -- 218.4 Кб -- 06.06.2007
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1663. http://hea.iki.rssi.ru/integral06/papers/I04_Alpar01-30May07_18:14:26.pdf
... Magnetar strength fields in the higher multipoles together with a dipole field of 1012-1013 G on the neutron star surface are compatible with the presence of a disk around the neutron star. ... ON MAGNETAR MODELS Magnetar models [15,16] successfully employ strong magnetic fields to explain the source of the bursts in Soft Gamma Repeaters (SGRs) and in AXPs. ... In their magnetic field requirements fallback disk models differ from magnetar models in the dipole component. ... 2006, ApJ 649, L87 12. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/I04_Alpar01-30May07_18:14:26.pdf -- 38.9 Кб -- 30.05.2007
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1664. http://hea.iki.rssi.ru/integral06/papers/F31_Malzac01-22May07_16:53:48.pdf
... During our 4 days long observation, the source exhibited a strong flux and spectral variability correlated with the radio emission. The study of this broad band variability suggests that the source made a mini-state transition from a nearly hard state to a nearly soft state, and back. ... It is a persistent source most often observed in the so-called Low Hard State (hereafter LHS), characterised by a relatively low flux in the soft X-rays ( 1 keV) and a high flux in the hard X-rays ( 100 keV). ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/F31_Malzac01-22May07_16:53:48.pdf -- 193.5 Кб -- 22.05.2007
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1665. http://hea.iki.rssi.ru/integral06/papers/G33_Fiocchi02-21May07_15:23:34.pdf
... Via Fosso del Cavaliere 100, Roma, I-00133, Italy ABSTRACT INTEGRAL and BeppoSAX observations of the neutronstar LMXB 4U 1705ґ44 have been analysed to deeply investigate the spectral state transitions nature. Its energy spectrum can be described as the sum of one or two blackbody, a 6.4-keV Fe line and a component due to thermal Comptonization. ... OBSERVATIONS AND DATA ANALYSIS Table 1 gives the log of INTEGRAL and BeppoSAX observations of the source. ... The analyzed INTEGRAL [31] data con- 1. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/G33_Fiocchi02-21May07_15:23:34.pdf -- 477.3 Кб -- 21.05.2007
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1666. http://hea.iki.rssi.ru/integral06/papers/I06_Castro-Tirado01-16May07_19:00:26.pdf
... The fact that a significant fraction of the INTEGRAL pointings are devoted to the Galactic Plane, makes many GRB afterglows elusive at optical wavelengths due to a considerable extinction in the line of sight. ... According to [18], GRB 040827 is, amongst all INTEGRAL events detected so far, the best example of an X-ray afterglow with intrinsic absorption. ... GRB 040223: A dark event similar to GRB 040624, among the weakest and longest bursts detected by INTEGRAL. ... 2005, GCNC 3499. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/I06_Castro-Tirado01-16May07_19:00:26.pdf -- 582.1 Кб -- 16.05.2007
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1667. http://hea.iki.rssi.ru/integral06/papers/G37_Brandt01-11May07_16:30:00.pdf
X-RAY BURSTS OBSERVED WITH JEM-X S. Brandt, J. Chenevez, N. Lund, C. Budtz-JЬrgensen, N.J. Westergaard Danish National Space Center, Juliane Mariesvej 30, DK-2100 Copenhagen, Denmark, E-mail: sb@spacecenter.dk ABSTRACT We report on the search for X-ray bursts in the JEM-X X-ray monitor on INTEGRAL during the first two years of operations. ... DATA ANALYSIS More than 350 type I X-ray bursts were found. ... One source, IGR J17254-3257, previously not known to be an X-ray burster, was found [6]. ... Fig. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/G37_Brandt01-11May07_16:30:00.pdf -- 181.3 Кб -- 11.05.2007
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1668. http://hea.iki.rssi.ru/integral06/papers/E09_Negueruela01-10May07_19:21:38.pdf
SUPERGIANT FAST X-RAY TRANSIENTS: A COMMON BEHAVIOUR OR A CLASS OF OBJECTS? ... University of Crete, PO Box 2208, 71003 Heraklion, Crete, Greece ABSTRACT INTEGRAL monitoring of the Galactic Plane is revealing a growing number of recurrent X-ray transients, characterised by short outbursts with very fast rise times ( tens of minutes) and typical durations of a few hours. ... The X-ray spectrum during the outbursts is generally very absorbed, though the absorption is variable. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/E09_Negueruela01-10May07_19:21:38.pdf -- 108.9 Кб -- 10.05.2007
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1669. http://hea.iki.rssi.ru/integral06/papers/J35_Knodlseder01-09May07_14:40:49.pdf
GRI: THE GAMMA-RAY IMAGER MISSION Jurgen Knodlseder1 and the GRI consortium ? ... While INTEGRAL provides the global overview over the soft gamma-ray sky, there is a growing need to perform deeper, more focused investigations of gamma-ray sources. ... High-sensitivity investigations of point sources, such as compact objects, pulsars, and active galactic nuclei, should help to uncover their yet poorly understood emission mechanisms. ... The origin of galactic soft -ray emission ?? ... GRI design 4. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/J35_Knodlseder01-09May07_14:40:49.pdf -- 586.9 Кб -- 09.05.2007
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1670. http://hea.iki.rssi.ru/integral06/papers/I33_Hajdas02-09May07_09:01:42.pdf
RHESSI INSTRUMENTAL LIMITS ON MEASUREMENTS OF THE GAMMA-RAY POLARIZATION FROM GRBS, SGRS AND SFS W. Hajdas(1), E. Suares(1), A. Mchedlishvili(1), C. Wigger(1) and A. Zehnder (1) (1) Paul Scherrer Institut,CH-5232 Villigen PSI, Switzerland, E-mail:wojtek.hajdas@psi.ch ABSTRACT The Reuven Ramaty High Energy Solar Spectroscopic Explorer (RHESSI) satellite [1] with its 9 large Ge detectors may be used as a rotating gamma ray polarimeter. ... This mode is applicable for energies higher than about 120 keV. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/I33_Hajdas02-09May07_09:01:42.pdf -- 188.7 Кб -- 09.05.2007
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1671. http://hea.iki.rssi.ru/integral06/papers/I30_Hajdas01-09May07_08:30:48.pdf
TRACKING DOWN THE SPECTRAL DATA FROM THE SGR1806-20 GEANT FLARE WITH THE IREM INSTRUMENT ON INTEGRAL W. Hajdas(1), E. Suares(1), C. Wigger(1), O. Bergogne(2), P. Buehler(1), A. Mohammadzadeh(4), F.di Marco(3), N. Produit(4) and M ... ESA/ESOC, 64293 Darmstadt, Germany European Space Research Technology Centre ESA/ESTEC, 2200 AG Noordwijk, Netherlands (4) INTEGRAL Science ... INTEGRAL with IREM onboard. ... 1000 IREM data Fit Counts / a.u. 100 10 1 100 1000 Energy Threshold / keV Fig. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/I30_Hajdas01-09May07_08:30:48.pdf -- 261.6 Кб -- 09.05.2007
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1672. http://hea.iki.rssi.ru/integral06/papers/B07_Hartmann01-07May07_12:04:00.pdf
TRACING GALACTIC STAR FORMATION WITH RADIOACTIVITIES Dieter H. Hartmann(1), Joshua Molgaard(1), Roland Diehl (1 ) (2) Clemson University, Department of Physics ... Max-Planck-Institut fЭr extraterrestrische Physik, Postfach 1312, D-85741Garching (Germany), E-mail: rod@mpe.mpg.de ABSTRACT The galactic star formation rate is a key parameter in the description of the structure and evolution of the interstellar medium (ISM), and further determines the ... They find SFR = 5.3 Mo/yr. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/B07_Hartmann01-07May07_12:04:00.pdf -- 279.4 Кб -- 07.05.2007
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1673. http://hea.iki.rssi.ru/integral06/papers/I31_Finger01-07May07_20:12:16.pdf
A SEARCH FOR GAMMA-RAY BURST POLARIZATION USING THE IBIS COMPTON MODE DATA Mark H. Finger1 , Chryssa Kouveliotou2, Lorenzo Natalucci3 , Pietro Ubertini3 , Angela Bazzano3 , Memmo Federici3 , Antony J. Bird4 ... Cavaliere 100, 00133 Roma, Italy School of Physics Astronomy, University of Southampton, SO17 1BJ, U.K. 2 1 4 ABSTRACT The IBIS Compton mode data , which consists of events coincident between the ISGRI and ... The Compton background was measured be- Figure 6. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/I31_Finger01-07May07_20:12:16.pdf -- 288.5 Кб -- 07.05.2007
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1674. http://hea.iki.rssi.ru/integral06/papers/E36_Stephen01-07May07_17:57:56.pdf
USING THE CORRELATION BETWEEN ISGRI SURVEY RESULTS AND OTHER CATALOGUES TO AID SOURCE IDENTIFICATION John B. Stephen, A. Malizia and L. Bassani IASF-INAF, Via P. Gobetti 101, 40129 Bologna, ITALY, E-mail: stephen@iasfbo.inaf.it ABSTRACT In order to help in the identification of INTEGRAL/ISGRI sources, we have developed a software package which allows a rapid and detailed cross-correlation to be performed between various source catalogues. ... We show below some preliminary results from this analysis. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/E36_Stephen01-07May07_17:57:56.pdf -- 317.3 Кб -- 07.05.2007
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1675. http://hea.iki.rssi.ru/integral06/papers/B35_Caliskan01-05May07_00:06:06.pdf
SEARCH FOR GRAVITATIONALLY REDSHIFTED 2.2 MEV LINE FROM 4U 1820-30 irin гalikan(1), Emrah Kalemci(2), Steven E. Boggs (1) (3) (2 BoaziГi University Physics Department, 34342, Bebek, Istanbul, Turkey ... University of California, Berkeley, CA, 95720 USA, E-mail: boggs@berkeley.edu ABSTRACT We have analyzed 1.7 Ms of the INTEGRAL data of the Low Mass X-Ray Binary (LMXB) 4U 1820-30 and searched for the redshifted 2.2 MeV ... The neutron star we focused is an accreting LMXB. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/B35_Caliskan01-05May07_00:06:06.pdf -- 207.7 Кб -- 04.05.2007
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1676. http://hea.iki.rssi.ru/integral06/papers/E35_Strobl01-04May07_18:21:49.pdf
ROBOTIC OBSERVATIONS OF INTEGRAL SOURCES IN THE OPTICAL DOMAIN Д Д Petr Kubanek1,2,4 , Rene Hudec 1 , John French3,4 , Jan Strobl1 , Martin Nekola1 , and Filip Munz1 1 Astronomicky ustav Akademie ved Ceske republiky, Ondrejov, Czech Republic ДД Д 2 INTEGRAL Science Data Center, Chemin d'Ecogia 16, Versoix, Switzerland 3 University College Dublin, Dublin, Ireland 4 for the Watcher Collaboration ABSTRACT ... The sources are monitored with BART[3]. ... IGR J00234+6141 error box. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/E35_Strobl01-04May07_18:21:49.pdf -- 1336.0 Кб -- 04.05.2007
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1677. http://hea.iki.rssi.ru/integral06/papers/F36_Del_Santo02-04May07_15:17:45.pdf
... Classified as a persistent source, on 2004 it showed a quiescent-like state. ... We present the long term temporal behaviour of 1E 1740.7ґ2942 observed by INTEGRAL and RXTE in 2004 and 2005, as well as preliminary results on possible spectral transitions. ... 1E 1740.7ґ2942 RXTE/PCA ligh curve based on short pointings in the energy range 6ґ12 keV. given. ... Our 2005 simultaneous INTEGRAL and RXTE observations were performed in high flux levels; as expected 1E 1740.7ґ2942 was in its Low/Hard state. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/F36_Del_Santo02-04May07_15:17:45.pdf -- 344.4 Кб -- 04.05.2007
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1678. http://hea.iki.rssi.ru/integral06/papers/F33_Hjalmarsdotter04-03May07_17:15:49_color.pdf
IDENTIFYING A NEW CLASS OF VARIABILITY IN GRS 1915+105 D.C. Hannikainen(1), L. Hja lma rsdotter(1), J. Rodriguez(2), O. Vilhu(1), A.A . ... The var iability pattern, which we name , is char acter ized by a pulsing behavior consisting of a main pu lse and a shorter, softer, and smaller amp litude precursor pulse, on a timescale of 5 min in the JEM-X 3ґ35 keV lightcurve. ... Th e JEM-X lightcurve from th e whole observation is shown in Fig. 1 and superposed is th e duration of the RXTE observation. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/F33_Hjalmarsdotter04-03May07_17:15:49_color.pdf -- 490.7 Кб -- 03.05.2007
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1679. http://hea.iki.rssi.ru/integral06/papers/F33_Hjalmarsdotter04-03May07_17:14:48_bandw.pdf
IDENTIFYING A NEW CLASS OF VARIABILITY IN GRS 1915+105 D.C. Hannikainen(1), L. Hja lma rsdotter(1), J. Rodriguez(2), O. Vilhu(1), A.A . ... The var iability pattern, which we name , is char acter ized by a pulsing behavior consisting of a main pu lse and a shorter, softer, and smaller amp litude precursor pulse, on a timescale of 5 min in the JEM-X 3ґ35 keV lightcurve. ... Th e JEM-X lightcurve from th e whole observation is shown in Fig. 1 and superposed is th e duration of the RXTE observation. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/F33_Hjalmarsdotter04-03May07_17:14:48_bandw.pdf -- 410.9 Кб -- 03.05.2007
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1680. http://hea.iki.rssi.ru/integral06/papers/G45_Ferrigno01-01May07_18:34:00.pdf
... OBSERVATIONS AND DATA ANALYSIS The European Space Agency's International Gamma-Ray Astronomy Laboratory (INTEGRAL ), launched in October 2002, carries 3 co-aligned coded mask telescopes: the imager IBIS [12] made of CdTe detector ISGRI [9], sensitive in the 15-600 keV range, and of a CsI layer, PICsIT [7] for energies up to several MeV, the spectrometer SPI sensitive from 20 keV to 8 Me, and the X-ray monitor JEM-X (sensitive from 3 keV to 34 keV). ... The dashed line is the model used by [10]. ...
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Ссылки http://hea.iki.rssi.ru/integral06/papers/G45_Ferrigno01-01May07_18:34:00.pdf -- 230.6 Кб -- 02.05.2007
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