Low-energy X-ray emission from the Abell 2199 cluster of galaxies

被引:8
作者
Kaastra, JS
Lieu, R
Bleeker, JAM
Mewe, R
Colafrancesco, S
机构
[1] Natl Inst Space Res, SRON, NL-3584 CA Utrecht, Netherlands
[2] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA
[3] Osserv Astron Roma, I-00040 Monte Porzio Catone, Italy
关键词
galaxies : clusters : general; galaxies : clusters : individual (Abell 2199); X-rays : galaxies;
D O I
10.1086/342209
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In a recent Letter, Berghofer & Bowyer rediscussed the analysis of BeppoSAX LECS data of the cluster of galaxies Abell 2199 as presented by Kaastra et al., in particular the detection of a soft X-ray excess. Berghofer & Bowyer stated that their analysis method is better suited and does not show evidence of a soft X- ray excess. Here we find it necessary to publish a rebuttal because it can be demonstrated that the method used by Berghofer & Bowyer is oversimplified, leading to an erroneous result. As a consequence, their statement that our initial analysis is incorrect is invalid, and the detection of a soft X- ray excess in A2199 is still confirmed.
引用
收藏
页码:L1 / L3
页数:3
相关论文
共 6 条
[1]   An analysis of BeppoSAX LECS observations of extreme-ultraviolet emission in clusters of galaxies [J].
Berghöfer, TW ;
Bowyer, S .
ASTROPHYSICAL JOURNAL, 2002, 565 (01) :L17-L20
[2]  
BOWYER S, 1998, IAU S, V188, P185
[3]  
Kaastra JS, 1999, ASTROPHYS J, V519, pL119, DOI 10.1086/312112
[4]   The low-energy concentrator spectrometer on-board the BeppoSAX X-ray astronomy satellite [J].
Parmar, AN ;
Martin, DDE ;
Bavdaz, M ;
Favata, F ;
Kuulkers, E ;
Vacanti, G ;
Lammers, U ;
Peacock, A ;
Taylor, BG .
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1997, 122 (02) :309-326
[5]   BeppoSAX Low-Energy Concentrator Spectrometer background subtraction techniques [J].
Parmar, AN ;
Oosterbroek, T ;
Orr, A ;
Guainazzi, M ;
Shane, N ;
Freyberg, MJ ;
Ricci, D ;
Malizia, A .
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1999, 136 (02) :407-418
[6]  
Parmar AN, 1999, ASTRON ASTROPHYS, V345, P611