Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done using the HEASARC data.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
==========================================================================
BAT GROUND-DETECTED GRB DATA PROCESSING REPORT
(This burst occurred during telescope slew)
Process Script Ver: batgrbproduct v2.46
Process Start Time: Mon Nov 10 23:39:24 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB100115A
======================================================================
Trigger: 00377179 Segment: 049
BAT Trigger Time: 285246923.0
UTC: 2010-01-15T11:15:17.560 [includes UTCF correction]
Where From?: Ground analysis (best_duration.txt)
NOTE: BAT trigger time for ground-detected burst during slew is the T100 start time.
Refined Position: [ source = BAT mosaic image ]
RA: 3.34214477589476 Dec: -0.812361227887495 [deg; J2000]
{ 00h 13m 22.1s , 00d -48' -44.5" }
+/- 1.73995739635 [arcmin] (estimated 90% radius based on SNR)
SNR: 13.7895027412
Angular difference between the analysis and refined position is Usage: arcmin
Partial Coding Fraction: Unavailable because the burst occurred during slew.
Duration
T90: 4. +/- 1.4142135623731
Measured from: 0
to: 4 [s; relative to TRIGTIME]
T50: 1. +/- 1.
Measured from: 1
to: 2 [s; relative to TRIGTIME]
====== Table of the duration information =============================
Value tstart tstop
T100 4.000 0.000 4.000
T90 4.000 0.000 4.000
T50 1.000 1.000 2.000
Peak 1.000 1.000 2.000
====== Spectral Analysis Summary =====================================
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^{Ph_index}
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedo
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
Model Ph_index Ph_90err_low Ph_90err_hi Epeak Epeak_90err_low Epeak_90err_hi Norm Nomr_90err_low Norm_90err_hi chi2 dof
PL -1.746 -0.198 0.190 - - - 5.17e-03 -6.22e-04 6.08e-04 61.210 57
CPL -1.625 -0.315 0.715 142.666 -91.486 -142.666 6.01e-03 -3.38e-03 8.33e-03 61.110 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: N/A)
Model Ph_index Ph_90err_low Ph_90err_hi Epeak Epeak_90err_low Epeak_90err_hi Norm Nomr_90err_low Norm_90err_hi chi2 dof
PL -1.574 -0.196 0.191 - - - 1.08e-02 -1.29e-03 1.27e-03 73.810 57
CPL -1.277 -0.462 0.768 116.839 -116.839 -116.839 1.55e-02 N/A N/A 73.240 56
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence PL 3.33e-08 5.26e-08 6.28e-08 1.46e-07 1.91e-07 2.94e-07 erg/cm2
90%_error_low -5.14e-09 -5.34e-09 -1.03e-08 -4.40e-08 -2.36e-08 -5.48e-08 erg/cm2
90%_error_hi 5.31e-09 5.34e-09 1.04e-08 5.52e-08 2.41e-08 6.39e-08 erg/cm2
Peak flux PL 4.77e-01 4.60e-01 3.09e-01 3.24e-01 1.38e+00 1.57e+00 ph/cm2/s
90%_error_low -8.20e-02 -5.12e-02 -4.75e-02 -9.01e-02 -1.50e-01 -1.76e-01 ph/cm2/s
90%_error_hi 8.54e-02 5.10e-02 4.73e-02 1.09e-01 1.50e-01 1.78e-01 ph/cm2/s
Fluence CPL 3.28e-08 5.34e-08 6.29e-08 1.17e-07 1.89e-07 2.66e-07 erg/cm2
90%_error_low -5.83e-09 -5.99e-09 -1.05e-08 -7.75e-08 -2.62e-08 -8.36e-08 erg/cm2
90%_error_hi 5.32e-09 6.76e-09 1.07e-08 3.86e-08 2.57e-08 4.62e-08 erg/cm2
Peak flux CPL 4.57e-01 4.75e-01 3.15e-01 2.24e-01 1.36e+00 1.47e+00 ph/cm2/s
90%_error_low -9.54e-02 -6.00e-02 -5.04e-02 N/A -1.54e-01 -2.09e-01 ph/cm2/s
90%_error_hi 9.57e-02 6.31e-02 5.17e-02 N/A 1.54e-01 2.53e-01 ph/cm2/s
======================================================================
Image
Note1: The mosaic image is made with timebin = 0.05 s; energybin = 15-350 keV
Note2: The mosaic image uses Galactic coordinate.
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name 3.342 -0.812 0.005 25.707 12.211 0.081 13.790 UNKNOWN Image time interval: 0.000 to 4.000 [sec]
Light Curves
Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.
Best duration plot
Full-time range; 1 s binning
Other quick-look light curves:
- 64 ms binning (zoomed)
- 16 ms binning (zoomed)
- 8 ms binning (zoomed)
- 2 ms binning (zoomed)
- SN=5 or 10 s binning (full-time range)
- Raw light curve
Spectra
- 64 ms binning (zoomed)
- 16 ms binning (zoomed)
- 8 ms binning (zoomed)
- 2 ms binning (zoomed)
- SN=5 or 10 s binning (full-time range)
- Raw light curve
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from 0.000 sec. to 4.000 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.74621 ( -0.197868 0.189953 ) Norm@50keV : 5.16790E-03 ( -0.00062182 0.000607509 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 61.21 using 59 PHA bins. # Reduced chi-squared = 1.074 for 57 degrees of freedom # Null hypothesis probability = 3.273036e-01 Photon flux (15-150 keV) in 4 sec: 0.697846 ( -0.071004 0.071029 ) ph/cm2/s Energy fluence (15-150 keV) : 1.90814e-07 ( -2.36164e-08 2.40779e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 4.000 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.62461 ( -0.314549 0.714818 ) Epeak [keV] : 142.666 ( -91.4944 -142.674 ) Norm@50keV : 6.01185E-03 ( -0.00337763 0.00832819 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 61.11 using 59 PHA bins. # Reduced chi-squared = 1.091 for 56 degrees of freedom # Null hypothesis probability = 2.975996e-01 Photon flux (15-150 keV) in 4 sec: 0.694055 ( -0.073654 0.073246 ) ph/cm2/s Energy fluence (15-150 keV) : 1.88617e-07 ( -2.61667e-08 2.56624e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 1.000 sec. to 2.000 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.57387 ( -0.19604 0.190754 ) Norm@50keV : 1.08067E-02 ( -0.00128554 0.00126628 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 73.81 using 59 PHA bins. # Reduced chi-squared = 1.295 for 57 degrees of freedom # Null hypothesis probability = 6.646230e-02 Photon flux (15-150 keV) in 1 sec: 1.37774 ( -0.15004 0.1501 ) ph/cm2/s Energy fluence (15-150 keV) : 1.01414e-07 ( -1.30836e-08 1.32877e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.000 sec. to 2.000 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.27687 ( -0.462081 0.767796 ) Epeak [keV] : 116.839 ( -116.839 -116.839 ) Norm@50keV : 1.54928E-02 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 73.24 using 59 PHA bins. # Reduced chi-squared = 1.308 for 56 degrees of freedom # Null hypothesis probability = 6.076551e-02 Photon flux (15-150 keV) in 1 sec: 1.36217 ( -0.15419 0.15401 ) ph/cm2/s Energy fluence (15-150 keV) : 9.89487e-08 ( -1.42045e-08 7.62744e-09 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 4.0 sec. Hardness ratio (energy fluence ratio) = 1.19236776521
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 8.590121e-08 S(50-150 keV) = 1.0491424e-07
The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.
Mask shadow pattern
Mask shadow pattern unavailable because this burst occurs during telescope slews.Spacecraft aspect plot
