J/MNRAS/422/679 Spectral parameters for MAXI J1543-564 (Stiele+, 2012)
The faint 2011 outburst of the black hole X-ray binary candidate MAXI J1543-564.
Stiele H., Munoz-Darias T., Motta S., Belloni T.M.
<Mon. Not. R. Astron. Soc., 422, 679-685 (2012)>
=2012MNRAS.422..679S 2012MNRAS.422..679S
ADC_Keywords: X-ray sources ; Binaries, X-ray ; Models
Keywords: black hole physics - binaries: close - X-rays: binaries -
X-rays: individual: MAXI J1543-564
Abstract:
We report on a spectral-timing analysis of the black hole X-ray binary
candidate MAXI J1543-564 during its 2011 outburst. All 99 pointed
observations of this outburst obtained with the Rossi X-ray Timing
Explorer (RXTE) were included in our study. We computed the
fundamental diagrams commonly used to study black hole transients, and
fitted power density and energy spectra to study the spectral and
timing parameters along the outburst. The determination of timing
parameters and hence of exact transitions between different states was
hampered by the rather low count rate at which this outburst was
observed. We detected two periods of exponential decay, one after the
source was brightest, which was interrupted by several flares, and
another one during the high soft state. The detection of these decays
allowed us to obtain an estimate for the source distance of at least
8.5kpc. This leaves two possible explanations for the observed low
count rate; either the source has a distance similar to that of other
black hole X-ray binary candidates and it is intrinsically faint, or
it has a similar luminosity, but is located more than 12 kpc away from
us. Furthermore, in the high/soft state the source spectrum appears to
be completely disc dominated.
Description:
We analysed 99 RXTE observations of MAXI J1543-564 performed between
2011 May 10 and September 30.
Objects:
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RA (2000) DE Designation(s)
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15 43 09.1 -56 25 16 MAXI J1543-564 = NAME MAXI J1543-564
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 106 97 *Spectral parameters derived from the best fit
for each observation.
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Note on table2.dat: A model consisting of simpl and diskbb was used. The
foreground absorption was fixed at NH=1.4x1022cm-2.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number of observation
4- 17 A14 --- ObsID RXTE Observation ID
19- 23 F5.1 d Day Time since the first observation (MJD-55691.1)
25- 31 F7.1 d MJD Modified Julian date of observation
33- 36 F4.2 --- chi2 Reduced χ2
38- 43 F6.2 --- diskbb Normalised disc blackbody model parameter
(Mitsuda et al. 1984PASJ...36..741M 1984PASJ...36..741M)
45- 51 F7.3 --- E_diskbb Error on diskbb (upper value)
53- 58 F6.2 --- e_diskbb Error on diskbb (lower value)
60- 63 F4.2 [keV] Tin Inner disc temperature
65- 68 F4.2 [keV] E_Tin Error on Tin (upper value)
70- 73 F4.2 [keV] e_Tin Error on Tin (lower value)
75- 78 F4.2 --- Gamma Photon index Γ
80- 83 F4.2 --- E_Gamma ? Error on Gamma (upper value)
85- 88 F4.2 --- e_Gamma ? Error on Gamma (lower value)
90- 94 F5.3 --- fSctr [0/1] Fraction of up-scattered radiation
96-100 F5.3 --- E_fSctr Error on fSctr (upper value)
102-106 F5.3 --- e_fSctr Error on fSctr (lower value)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Dec-2012