=2010A&A...513A..21M
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ADC_Keywords: QSOs ; X-ray sources ; Accretion
Keywords: binaries: close - accretion, accretion disks -
stars: individual: GRS 1915+105 - X-rays: stars
Abstract:
GRS 1915+105 was observed by BeppoSAX for about 10 days in October
2000. For about 80% of the time, the source was in the variability
class rho, characterised by a series of recurrent bursts. We describe
the results of the timing analysis performed on the MECS (1.6-10keV)
and PDS (15-100keV) data. The X-ray count rate from GRS 1915+105
showed an increasing trend with different characteristics in the
various energy bands: in the bands (1.6-3keV) and (15-100keV), it
was nearly stable in the first part of the pointing and increased in a
rather short time by about 20%, while in the energy range (3-10keV)
the increase had a smoother trend.
Description:
Table A2 contains initial times (starting from 20 October 2000 at
UT=21h26m55s, duration and mean count rates in the MECS (1.6-10keV),
and PDS (15-100keV) of all time series for the pointing of October
2000. Multiplicity of bursts: for each series we report the number of
complete bursts, the numbers of bursts with multiplicities from p1 to
p4 and higher and the number of anomalous bursts.
Table A3 contains results of the Fourier and wavelet spectral analysis
and the classification of the considered 89 MECS time series. For each
series is given the name code, the P1/P2 power ratio of two highest
peaks, the recurrence time of the unique (for the S series) and of the
two (for the T series) dominant peaks or the centroid and the interval
width (for the M series), the temporal resolution at the peak, the
time scale of the maximum in the wavelet spectra, the ratio R_w and
the series classification.
Objects:
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RA (2000) DE Designation(s)
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19 15 11.6 +10 56 44 GRS 1915+105 = V* V1487 Aql
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea2.dat 71 172 Initial times and multiplicity of bursts
tablea3.dat 48 102 Results of the Fourier and wavelet spectral analysis
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See also:
J/A+A/397/711 : Comptonization and reflection in GRS 1915+105 (Rau+, 2003)
J/ApJ/657/409 : K-band light curve of GRS 1915+105 (Neil+, 2007)
Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Series Series code
6- 13 F8.1 s Time Initial time, origin is 20 October 2000
at UT=21h26m55s
15- 20 F6.1 s Dur Duration of burst
22- 26 F5.1 ct Ct(1.6-10) MECS (1.6-10keV) mean count rate
[energy channels 36-220]
28- 31 F4.1 ct Ct(1.6-3) MECS (1.6-3.0keV) mean count rate
[energy channels 36-66]
33- 37 F5.1 ct Ct(3-5) MECS (3.0-5.0keV) mean count rate
[energy channels 67-110]
39- 42 F4.1 ct Ct(5-10) MECS (5.0-10keV) mean count rate
[energy channels 110-220]
44- 47 F4.1 ct Ct(15-150) ?=- PDS (15-150keV) mean count rate
49- 50 I2 --- Nbursts Number of complete bursts
52- 53 I2 --- Np1 Number of p1 bursts
55- 56 I2 --- Np2 Number of p2 bursts
58- 59 I2 --- Np3 Number of p3 bursts
61- 62 I2 --- Np4 Number of p4 bursts
64 I1 --- Np>4 Number of p>4 bursts
66- 69 F4.2 --- N Mean burst multiplicity
71 I1 --- Nab Number of anomalous bursts
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Series Series code
6- 9 F4.2 --- P1/P2 ?=- P1/P2 power ratio of two highest peaks
11- 14 F4.1 s Trec ? Recurrence time of the unique (for the S series)
or the first (for the T series) dominant peak
16- 19 F4.1 s Trec2 ? Recurrence time of the second dominant peak
(for the T series)
21- 24 F4.1 s Trec3 ? Recurrence time of the centroid
(for the M series)
26- 29 F4.1 s Width ? Interval width (for the M series)
31- 33 F3.1 s Deltat Temporal resolution at the peak
35- 39 F5.1 s Time scale of the maximum in the wavelet spectra
41- 45 F5.2 % Rw Ratio Rw (=sigma_T_/) of the standard
deviation of the T_J,max_ to its mean value
across the series (1)
47- 48 A2 --- Type S, T or M series classification
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Note (1): The Rw ratio can be then taken as a measure of the stability of
the recurrence time.
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Acknowledgements:
Enrico Massaro, enrico.massaro(at)uniroma1.it
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(End) Patricia Vannier [CDS] 12-Mar-2010