2014A&A...564A..20J


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.16CEST09:48:36

2014A&A...564A..20J - Astronomy and Astrophysics, volume 564A, 20-20 (2014/4-1)

Possible hard X-ray shortages in bursts from KS 1731-260 and 4U 1705-44.

JI L., ZHANG S., CHEN Y.-P., ZHANG S.-N., KRETSCHMAR P., WANG J.-M. and LI J.

Abstract (from CDS):

A hard X-ray shortage, implying the cooling of the corona, was observed during bursts of IGR J17473-272, 4U 1636-536, Aql X-1, and GS 1826-238. Apart from these four sources, we investigate here an atoll sample, in which the number of bursts for each source is larger than 5, to explore the possible additional hard X-ray shortage during Rossi X-ray timing explorer (RXTE) era. According to the source catalog that shows type-I bursts, we analyzed all the available pointing observations of these sources carried out by the RXTE proportional counter array. We grouped and combined the bursts according to their outburst states and searched for the possible hard X-ray shortage while bursting. We found that the island states of KS 1731-260 and 4U 1705-44 show a hard X-ray shortage at significant levels of 4.5 and 4.7σ and a systematic time lag of 0.9±2.1s and 2.5±2.0s with respect to the soft X-rays, respectively. While in their banana branches and other sources, we did not find any consistent shortage.

Abstract Copyright:

Journal keyword(s): stars: coronae - X-rays: binaries - X-rays: bursts - stars: neutron

Simbad objects: 24

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Number of rows : 24

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 4U 0513-40 LXB 05 14 06.59 -40 02 37.0           ~ 156 1
2 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5724 4
3 V* UY Vol LXB 07 48 33.71 -67 45 07.7 16.10 17.00 16.9 16.7 17.05 ~ 586 0
4 4U 0836-42 LXB 08 37 23.6 -42 54 02           ~ 64 0
5 V* QX Nor LXB 16 12 43.0 -52 25 23           ~ 849 1
6 V* V801 Ara LXB 16 40 55.5979962948 -53 45 04.953475039 17.50 18.20 17.5   17.07 ~ 803 1
7 X Ara X-1 LXB 17 06 15.314 -43 02 08.69           ~ 244 1
8 4U 1705-44 LXB 17 08 54.470 -44 06 07.35           ~ 362 0
9 NAME Slow Burster LXB 17 31 57.73 -33 50 02.5     15.50     ~ 775 1
10 KS 1731-260 LXB 17 34 13.46 -26 05 18.6       22.8 20.9 ~ 399 0
11 V* V926 Sco LXB 17 38 58.3 -44 27 00 16.90 17.70 17.5     ~ 433 0
12 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12108 0
13 [KRL2007b] 277 LXB 17 47 18.06 -27 20 38.9           ~ 72 0
14 1RXS J174725.6-300241 LXB 17 47 25.4 -30 02 41           ~ 58 0
15 NAME TER 5 X-1 LXB 17 48 05.196 -24 46 47.40           ~ 199 1
16 SAX J1750.8-2900 LXB 17 50 24.42 -29 02 15.4           ~ 131 0
17 IGR J17511-3057 LXB 17 51 08.55 -30 57 41.7           ~ 91 1
18 [KRL2007b] 297 LXB 17 59 45.7 -22 01 39           ~ 61 1
19 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 921 1
20 V* V4634 Sgr LXB 18 29 28.2 -23 47 49 18.90 19.40 19     ~ 300 0
21 2MAXI J1900-248 LXB 19 00 08.65 -24 55 13.7     18.09     ~ 188 0
22 X Aql X-1 LXB 19 11 16.0572031521 +00 35 05.876658556           ~ 1040 1
23 V* V1405 Aql LXB 19 18 47.871 -05 14 17.09 20.90 21.40 21.0     ~ 447 0
24 NAME Galactic Bulge reg ~ ~           ~ 3564 0

    Equat.    Gal    SGal    Ecl

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