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 GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time: Thu Sep 11 17:50:30 EDT 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger210084
======================================================================
Trigger: 00210084 Segment: 000
BAT Trigger Time: 169352874.112 [s; MET]
Trigger Stop: 169352882.304 [s; MET]
UTC: 2006-05-15T02:27:52.918180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 127.287530616633 Dec: 73.550864318477 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.76
Image Trigger?: NO
Rate S/N Ratio: 16.6132477258361 [ if not an image trigger ]
Image S/N Ratio: 7.76
Analysis Position: [ source = BAT ]
RA: 127.287530616633 Dec: 73.550864318477 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 127.26530582467 Dec: 73.5641280009945 [deg; J2000]
{ 08h 29m 03.7s , +73d 33' 50.9" }
+/- 1.55928508120979 [arcmin] (estimated 90% radius based on SNR)
+/- 0.693182706056226 [arcmin] (formal 1-sigma fit error)
SNR: 16.1253997255507
Angular difference between the analysis and refined position is 0.880794 arcmin
Partial Coding Fraction: 0.3828125 [ including projection effects ]
Duration
T90: 52.3720000088215 +/- 5.48459115222539
Measured from: 2.08400002121925
to: 54.4560000300407 [s; relative to TRIGTIME]
T50: 26.2080000042915 +/- 8.09171129188858
Measured from: 8.88800001144409
to: 35.0960000157356 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.58400002121925
to: 6.58400002121925 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.219999998807907
to: 57.5040000081062 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.376898 0.611240 0.746314 0.193403
0.056548 0.059517 0.052711 0.044567 [error]
Peak 0.009590 0.034532 0.050303 0.009417
0.007541 0.008183 0.007962 0.006612 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 57.284 0.220 57.504
T90 52.372 2.084 54.456
T50 26.208 8.888 35.096
Peak 1.000 5.584 6.584
====== 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 -1.114 -0.149 0.153 - - - 2.41e-03 -2.13e-04 2.12e-04 66.520 57
CPL -0.443 -0.635 0.759 137.638 -43.035 854.493 4.67e-03 -2.13e-03 4.71e-03 63.250 56
=== 1-s peak 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 -0.712 -0.379 0.430 - - - 7.15e-03 -1.85e-03 1.77e-03 52.660 57
CPL 0.049 -1.412 2.788 178.805 -178.805 -178.805 1.38e-02 -8.13e-03 7.38e-02 52.020 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 1.23e-07 2.87e-07 5.29e-07 2.35e-06 1.44e-06 3.29e-06 erg/cm2
90%_error_low -2.14e-08 -3.11e-08 -5.02e-08 -4.68e-07 -1.30e-07 -4.97e-07 erg/cm2
90%_error_hi 2.28e-08 3.07e-08 4.99e-08 5.46e-07 1.31e-07 5.62e-07 erg/cm2
Peak flux PL 1.39e-01 2.25e-01 2.74e-01 6.58e-01 8.25e-01 1.30e+00 ph/cm2/s
90%_error_low -6.65e-02 -7.55e-02 -5.97e-02 -2.60e-01 -1.95e-01 -3.04e-01 ph/cm2/s
90%_error_hi 8.36e-02 7.55e-02 5.95e-02 3.63e-01 1.98e-01 3.35e-01 ph/cm2/s
Fluence CPL 1.02e-07 2.95e-07 5.69e-07 1.13e-06 1.40e-06 2.10e-06 erg/cm2
90%_error_low -2.81e-08 -3.42e-08 -6.27e-08 -5.10e-07 -1.37e-07 -5.20e-07 erg/cm2
90%_error_hi 2.96e-08 3.44e-08 6.44e-08 1.13e-06 1.37e-07 1.11e-06 erg/cm2
Peak flux CPL 1.05e-01 2.21e-01 3.01e-01 3.82e-01 8.01e-01 1.01e+00 ph/cm2/s
90%_error_low -8.40e-02 -9.66e-02 -7.86e-02 -2.38e-01 -2.03e-01 -3.46e-01 ph/cm2/s
90%_error_hi 1.06e-01 8.31e-02 8.59e-02 3.87e-01 2.04e-01 4.53e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 127.2653 73.5641 0.0119 36.3046 -125.6238 2.0453202 16.125 TRIG_00210084 Foreground time interval of the image: 0.220 57.504 (delta_t = 57.284 [sec]) Background time interval of the image: -239.112 0.220 (delta_t = 239.332 [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.
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 0.220 sec. to 57.504 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.11417 ( -0.149131 0.152933 ) Norm@50keV : 2.41130E-03 ( -0.000212534 0.000211754 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 66.52 using 59 PHA bins. # Reduced chi-squared = 1.167 for 57 degrees of freedom # Null hypothesis probability = 1.820281e-01 Photon flux (15-150 keV) in 57.28 sec: 0.280090 ( -0.025825 0.025943 ) ph/cm2/s Energy fluence (15-150 keV) : 1.43778e-06 ( -1.30125e-07 1.30679e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.220 sec. to 57.504 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.443211 ( -0.635214 0.75866 ) Epeak [keV] : 137.638 ( -43.0299 854.497 ) Norm@50keV : 4.66681E-03 ( -0.00213419 0.00470512 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.25 using 59 PHA bins. # Reduced chi-squared = 1.129 for 56 degrees of freedom # Null hypothesis probability = 2.357384e-01 Photon flux (15-150 keV) in 57.28 sec: 0.270787 ( -0.027473 0.027428 ) ph/cm2/s Energy fluence (15-150 keV) : 1.40082e-06 ( -1.37213e-07 1.36635e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 5.584 sec. to 6.584 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.712326 ( -0.378625 0.430426 ) Norm@50keV : 7.14601E-03 ( -0.00184707 0.00176648 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.66 using 59 PHA bins. # Reduced chi-squared = 0.9239 for 57 degrees of freedom # Null hypothesis probability = 6.383156e-01 Photon flux (15-150 keV) in 1 sec: 0.825226 ( -0.194694 0.197784 ) ph/cm2/s Energy fluence (15-150 keV) : 8.67541e-08 ( -1.92593e-08 1.92835e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.584 sec. to 6.584 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.0488861 ( -1.41163 2.78815 ) Epeak [keV] : 178.805 ( -178.808 -178.808 ) Norm@50keV : 1.37840E-02 ( -0.00812492 0.0738335 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.02 using 59 PHA bins. # Reduced chi-squared = 0.9290 for 56 degrees of freedom # Null hypothesis probability = 6.261294e-01 Photon flux (15-150 keV) in 1 sec: 0.801461 ( -0.202674 0.204069 ) ph/cm2/s Energy fluence (15-150 keV) : 8.58045e-08 ( -1.98142e-08 1.96148e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 52.372 sec. Hardness ratio (energy fluence ratio) = 1.84786408841
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 4.095643e-07 S(50-150 keV) = 1.0282006e-06
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
IMX = -4.279320086049428E-01, IMY = 5.972037963287603E-01
Spacecraft aspect plot
Bright source in the pre-burst/pre-slew/post-slew images
Pre-burst image of 15-350 keV band
Time interval of the image: -239.112000 0.220000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5286 35.2978 11.0 29.3 48.3 0.2338 1.0 4.4 Her X-1 299.6018 35.1962 0.5 47.5 -5.2 8.5324 24.4 0.7 Cyg X-1 308.0393 40.9207 3.1 46.8 -17.1 1.1591 3.7 3.7 Cyg X-3 326.2094 38.3627 6.6 57.1 -29.6 -1.9347 -1.8 3.0 Cyg X-2 133.0944 47.7006 3.9 54.1 -152.9 1.8158 3.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 0.220000 57.504000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5481 35.3402 7.3 29.3 48.2 0.1567 1.6 4.4 Her X-1 299.7215 35.2158 12.1 47.5 -5.3 -0.1406 -1.0 6.5 Cyg X-1 308.2451 40.9636 4.1 46.9 -17.3 0.3953 2.8 6.1 Cyg X-3 326.2824 38.2401 4.1 57.2 -29.6 1.3377 2.8 7.2 Cyg X-2 127.2652 73.5641 0.7 36.3 -125.6 2.0454 16.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 178.788600 423.038000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.6882 35.4077 0.0 23.5 105.5 0.0636 1.2 11.9 Her X-1 288.8539 10.8118 4.3 39.9 30.7 0.2216 2.7 8.7 GRS 1915+105 299.6327 35.2187 0.6 20.5 -7.1 0.8192 19.3 2.3 Cyg X-1 308.1475 40.9533 2.5 21.5 -31.7 0.2041 4.7 1.7 Cyg X-3 326.3290 38.4719 7.0 34.5 -44.2 -0.0947 -1.6 11.7 Cyg X-2 219.2760 31.6682 1.7 48.0 135.8 1.2892 6.6 ------ UNKNOWN 87.9849 86.0200 2.1 43.9 -134.5 0.4931 5.4 ------ UNKNOWN 336.1758 14.0251 2.9 57.8 -27.9 1.0517 4.0 ------ UNKNOWN 69.6749 80.5756 2.7 48.3 -129.4 0.8158 4.3 ------ UNKNOWN