Variability of X-ray pulsars in a hard energy band observed with INTEGRAL

被引：0

作者：

Lutovinov, A ^{[1
]}

Tsygankov, S ^{[1
]}

Revnivtsev, M ^{[1
]}

Chernyakova, M ^{[1
]}

Bikmaev, I ^{[1
]}

Molkov, S ^{[1
]}

Burenin, R ^{[1
]}

Pavlinsky, M ^{[1
]}

Sakhibullin, N ^{[1
]}

机构：

[1] Spase Res Inst, Moscow 117997, Russia

来源：

PROCEEDINGS OF THE 5TH INTEGRAL WORKSHOP ON THE INTEGRAL UNIVERSE | 2004年 / 552卷

关键词：

neutron stars; X-ray pulsars;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first results of the observations of the X-ray pulsars LMC X-4, 4U0352+309 and EXO1722-363 performed with the INTEGRAL observatory. The LMC X-4 was investigated during the whole superorbital cycle (similar to 30 days) and it was found that its period was not stable at this time scale. We detected a variable X-ray flux (18-60 keV) from the pulsar EXO1722-363, which could be connected with the orbital motion in the binary system. A more accurate position and the estimate of the orbital period for this source are reported. We also investigated a bard X-ray spectrum of 4U0352+309 (X Persei) measured with INTEGRAL and report the detection of the cyclotron absorption line at about 29 keV.

引用

页码：253 / 258

页数：6

共 21 条

[1]

[Anonymous], ATEL

[2] Long-term properties of accretion discs in X-ray binaries - II. Stability of radiation-driven warping [J].

Clarkson, WI ;

Charles, PA ;

Coe, MJ ;

Laycock, S .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2003, 343 (04) :1213-1223

[3] Discovery of a cyclotron resonant scattering feature in the Rossi X-ray Timing Explorer spectrum of 4U 0352+309 (X Persei) [J].

Coburn, W ;

Heindl, WA ;

Grubert, DE ;

Rothschild, RE ;

Staubert, R ;

Wilms, J ;

Kreykenbohm, I .

ASTROPHYSICAL JOURNAL, 2001, 552 (02) :738-747

[4] The two-component X-ray broadband spectrum of X Persei observed by BeppoSAX [J].

Di Salvo, T ;

Burderi, L ;

Robba, NR ;

Guainazzi, M .

ASTROPHYSICAL JOURNAL, 1998, 509 (02) :897-903

[5] Orbit design for launching INTEGRAL on the Proton/Block-DM launcher [J].

Eismont, NA ;

Ditrikh, AV ;

Janin, G ;

Karrask, VK ;

Clausen, K ;

Medvedchikov, AI ;

Kulik, SV ;

Vtorushin, NA ;

Yakushin, NI .

ASTRONOMY & ASTROPHYSICS, 2003, 411 (01) :L37-L41

[6] The 0.1-100 keV spectrum of LMC X-4 in the high state: Evidence for a high-energy cyclotron absorption line [J].

La Barbera, A ;

Burderi, L ;

Di Salvo, T ;

Iaria, R ;

Robba, NR .

ASTROPHYSICAL JOURNAL, 2001, 553 (01) :375-381

[7]

LANG F, 1951, APJ, V246, pL21

[8] ISGRI:: The INTEGRAL Soft Gamma-Ray Imager [J].

Lebrun, F ;

Leray, JP ;

Lavocat, P ;

Crétolle, J ;

Arquès, M ;

Blondel, C ;

Bonnin, C ;

Bouère, A ;

Cara, C ;

Chaleil, T ;

Daly, F ;

Desages, F ;

Dzitko, H ;

Horeau, B ;

Laurent, P ;

Limousin, O ;

Mathy, F ;

Mauguen, V ;

Meignier, F ;

Moliniè, F ;

Poindron, E ;

Rouger, M ;

Sauvageon, A ;

Tourrette, T .

ASTRONOMY & ASTROPHYSICS, 2003, 411 (01) :L141-L148

[9] Orbital decay in LMC X-4 [J].

Levine, AM ;

Rappaport, SA ;

Zojcheski, G .

ASTROPHYSICAL JOURNAL, 2000, 541 (01) :194-202

[10] JEM-X:: The X-ray monitor aboard INTEGRAL [J].

Lund, N ;

Budtz-Jorgensen, C ;

Westergaard, NJ ;

Brandt, S ;

Rasmussen, IL ;

Hornstrup, A ;

Oxborrow, CA ;

Chenevez, J ;

Jensen, PA ;

Laursen, S ;

Andersen, KH ;

Mogensen, PB ;

Rasmussen, I ;

Omo, K ;

Pedersen, SM ;

Polny, J ;

Andersson, H ;

Andersson, T ;

Kämäräinen, V ;

Vilhu, O ;

Huovelin, J ;

Maisala, S ;

Morawski, M ;

Juchnikowski, G ;

Costa, E ;

Feroci, M ;

Rubini, A ;

Rapisarda, M ;

Morelli, E ;

Carassiti, V ;

Frontera, F ;

Pelliciari, C ;

Loffredo, G ;

Núñez, SM ;

Reglero, V ;

Velasco, T ;

Larsson, S ;

Svensson, R ;

Zdziarski, AA ;

Castro-Tirado, A ;

Attina, P ;

Goria, M ;

Giulianelli, G ;

Cordero, F ;

Rezazad, M ;

Schmidt, M ;

Carli, R ;

Gomez, C ;

Jensen, PL ;

Sarri, G .

ASTRONOMY & ASTROPHYSICS, 2003, 411 (01) :L231-L238

← 1 2 3 →