| | |
| | |
Stat |
Members: 3643 Articles: 2'488'730 Articles rated: 2609
29 March 2024 |
|
| | | |
|
Article overview
| |
|
BeppoSAX observations of two unclassified LMXBs: X1543-624 and X1556-605 | R. Farinelli
; F. Frontera
; N. Masetti
; L. Amati
; C. Guidorzi
; M. Orlandini
; E. Palazzi
; A.N. Parmar
; L. Stella
; M. Van der Klis
; S.N. Zhang
; | Date: |
22 Dec 2002 | Journal: | Astron.Astrophys. 402 (2003) 1021-1032 | Subject: | astro-ph | Affiliation: | 1,2), N. Masetti , L. Amati , C. Guidorzi , M. Orlandini , E. Palazzi , A.N. Parmar , L. Stella , M. Van der Klis , S.N. Zhang ( Dipartimento di Fisica Universita’ di Ferrara Italy, Istituto Astrofisica Spaziale e Fisica Cosmica CNR Bologna It | Abstract: | Observations of two unclassified Low Mass X-ray Binaries, X1543-624 and X1556-605, are presented. In the 2-10 keV band the first of the two sources is a factor two stronger than the other. Both sources do not show X-ray bursts, dips or eclipses in their X-ray light curves. We find that both spectra are described by a two-component model consisting of emission from a cool accretion disk plus a Comptonized blackbody with kTbb ~ 1.5 keV in a low opacity plasma. The spectrum of X1543-624 hardens from the first to the second observation, when the source slowly moves from right to left in the colour-colour diagram. The spectrum of X1556-605 can also be described by a model consisting of a blackbody plus an unsaturated Comptonization with electron energy kTe ~ 4 keV. In the first observation, X1543-624 shows evidence of a Fe K emission line at 6.4 keV. Moreover in both observations, the source spectrum exhibits an emission feature around 0.7 keV, which is interpreted as due to the superposition of the K edge absorption features of O and Ne elements with uncommon relative abundances with respect to the solar one (O/O(sun) ~0.3, Ne/Ne(sun) ~ 2.5). In the spectrum of X1556-605 no emission lines are observed. We discuss these results and their implications on the source classification and the accretion geometry on the compact object. | Source: | arXiv, astro-ph/0301443 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |