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: Mon Jan 20 07:21:12 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger291292
======================================================================
Trigger: 00291292 Segment: 000
BAT Trigger Time: 211707238.912 [s; MET]
Trigger Stop: 211707239.936 [s; MET]
UTC: 2007-09-17T07:33:56.682320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 293.925010039201 Dec: 2.41308727492074 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 24.76
Image Trigger?: NO
Rate S/N Ratio: 167.16758058906 [ if not an image trigger ]
Image S/N Ratio: 24.76
Analysis Position: [ source = BAT ]
RA: 293.925010039201 Dec: 2.41308727492074 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 293.920429597368 Dec: 2.42436755961347 [deg; J2000]
{ 19h 35m 40.9s , +02d 25' 27.7" }
+/- 0.608439337971967 [arcmin] (estimated 90% radius based on SNR)
+/- 0.222478275194975 [arcmin] (formal 1-sigma fit error)
SNR: 61.8556537423431
Angular difference between the analysis and refined position is 0.730395 arcmin
Partial Coding Fraction: 0.7734375 [ including projection effects ]
Duration
T90: 8.71999999880791 +/- 1.72291033212711
Measured from: 0.212000012397766
to: 8.93200001120567 [s; relative to TRIGTIME]
T50: 2.47200000286102 +/- 0.162086385406289
Measured from: 0.796000003814697
to: 3.26800000667572 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.212000012397766
to: 1.21200001239777 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.104000002145767
to: 15.1279999911785 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.917523 1.260095 0.945276 0.232299
0.026622 0.026769 0.023308 0.018048 [error]
Peak 0.236562 0.387197 0.340742 0.105800
0.009086 0.010465 0.010214 0.007382 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 15.232 -0.104 15.128
T90 8.720 0.212 8.932
T50 2.472 0.796 3.268
Peak 1.000 0.212 1.212
====== 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 -1.496 -0.052 0.052 - - - 1.46e-02 -3.89e-04 3.89e-04 42.590 57
CPL -1.408 -0.118 0.200 364.466 -364.466 -364.466 1.61e-02 -1.74e-03 3.67e-03 41.980 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 -1.212 -0.058 0.058 - - - 7.29e-02 -2.29e-03 2.29e-03 36.350 57
CPL -1.060 -0.175 0.226 349.093 -349.093 -349.093 8.54e-02 -1.42e-02 2.19e-02 34.910 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 2.84e-07 5.22e-07 7.40e-07 2.21e-06 2.12e-06 3.76e-06 erg/cm2
90%_error_low -1.53e-08 -1.62e-08 -2.46e-08 -1.66e-07 -5.95e-08 -1.79e-07 erg/cm2
90%_error_hi 1.56e-08 1.61e-08 2.45e-08 1.75e-07 5.97e-08 1.86e-07 erg/cm2
Peak flux PL 5.81e-04 6.90e-03 1.10e-01 9.60e+00 4.81e-01 9.64e+00 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A N/A ph/cm2/s
Fluence CPL 2.73e-07 3.66e-07 3.77e-07 8.52e-07 1.24e-06 1.55e-06 erg/cm2
90%_error_low -2.50e-08 -2.37e-08 -2.43e-08 -5.72e-08 -1.18e-07 1.28e-07 erg/cm2
90%_error_hi 8.54e-09 7.70e-09 2.14e-08 4.98e-08 1.20e-07 3.95e-07 erg/cm2
Peak flux CPL 2.19e+00 2.74e+00 2.39e+00 2.95e+00 8.50e+00 1.03e+01 ph/cm2/s
90%_error_low -1.86e-01 -1.09e-01 -1.02e-01 -5.93e-01 -2.98e-01 -6.82e-01 ph/cm2/s
90%_error_hi 9.54e-02 1.10e-01 1.03e-01 5.98e-01 2.98e-01 7.22e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 293.9204 2.4244 0.0031 20.3668 42.4564 3.4417314 61.856 TRIG_00291292 Foreground time interval of the image: -0.104 15.128 (delta_t = 15.232 [sec]) Background time interval of the image: -239.912 -0.104 (delta_t = 239.808 [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 -0.104 sec. to 15.128 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.4965 ( -0.0515692 0.0515707 ) Norm@50keV : 1.46307E-02 ( -0.000388904 0.000388882 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 42.59 using 59 PHA bins. # Reduced chi-squared = 0.7472 for 57 degrees of freedom # Null hypothesis probability = 9.221532e-01 Photon flux (15-150 keV) in 15.23 sec: 1.82481 ( -0.05379 0.05396 ) ph/cm2/s Energy fluence (15-150 keV) : 2.11529e-06 ( -5.95466e-08 5.96585e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.104 sec. to 15.128 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.40783 ( -0.11817 0.199856 ) Epeak [keV] : 364.466 ( -365.138 -365.138 ) Norm@50keV : 1.60723E-02 ( -0.00173504 0.00367108 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 41.98 using 59 PHA bins. # Reduced chi-squared = 0.7496 for 56 degrees of freedom # Null hypothesis probability = 9.178127e-01 Photon flux (15-150 keV) in 15.23 sec: 1.81241 ( -0.05972 0.05975 ) ph/cm2/s Energy fluence (15-150 keV) : 1.23891e-06 ( -1.18131e-07 1.19559e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.212 sec. to 1.212 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.21172 ( -0.0575026 0.0576053 ) Norm@50keV : 7.28843E-02 ( -0.00229097 0.00229072 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 36.35 using 59 PHA bins. # Reduced chi-squared = 0.6378 for 57 degrees of freedom # Null hypothesis probability = 9.849736e-01 Photon flux (15-150 keV) in 1 sec: 0.480664 ( ) ph/cm2/s Energy fluence (15-150 keV) : 7.37106e-07 ( -2.5483e-08 2.55347e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.212 sec. to 1.212 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.05974 ( -0.175419 0.225824 ) Epeak [keV] : 349.093 ( -349.093 -349.093 ) Norm@50keV : 8.53765E-02 ( -0.0142039 0.0218699 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 34.91 using 59 PHA bins. # Reduced chi-squared = 0.6234 for 56 degrees of freedom # Null hypothesis probability = 9.878706e-01 Photon flux (15-150 keV) in 1 sec: 8.49948 ( -0.29757 0.29792 ) ph/cm2/s Energy fluence (15-150 keV) : 7.30903e-07 ( -2.71342e-08 2.70286e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 8.72 sec. Hardness ratio (energy fluence ratio) = 1.41768581023
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 8.058236e-07 S(50-150 keV) = 1.3094958e-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 = 2.738953237306905E-01, IMY = -2.505954614291482E-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: -239.912000 -0.104000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9760 -15.6495 0.5 32.7 -110.9 7.6998 24.6 0.6 Sco X-1 254.6551 35.4912 62.0 51.2 -33.2 0.1159 0.2 13.2 Her X-1 256.0072 -37.8428 1.0 33.7 -155.9 2.4033 11.1 1.0 4U 1700-377 256.4486 -36.4410 2.8 32.4 -154.7 0.8425 4.1 1.3 GX 349+2 263.0045 -24.8036 2.6 20.2 -144.9 0.7889 4.4 3.5 GX 1+4 264.5595 -44.4722 3.4 35.8 -171.7 0.7496 3.4 8.0 4U 1735-44 268.3345 -1.4545 2.5 13.5 -56.0 0.8389 4.5 2.0 SW J1753.5-0127 270.2779 -25.1075 1.4 16.3 -162.0 1.4415 8.3 1.7 GX 5-1 270.3442 -25.9034 12.0 17.0 -163.5 0.1674 1.0 9.9 GRS 1758-258 274.0819 -14.2005 5.5 5.4 -140.2 0.3414 2.1 10.8 GX 17+2 276.0124 -30.3744 4.8 19.8 177.2 0.4017 2.4 4.5 H1820-303 285.2154 -24.7998 5.4 15.6 147.3 0.3522 2.1 12.2 HT1900.1-2455 288.8514 10.7853 6.7 23.9 18.1 0.3087 1.7 10.1 GRS 1915+105 299.5869 35.2120 0.7 50.1 14.3 8.5372 16.3 0.6 Cyg X-1 263.1465 -33.8722 4.7 27.0 -160.1 0.4636 2.4 8.2 GX 354-0 288.0696 -37.4631 3.3 28.2 154.9 0.7923 3.5 ------ UNKNOWN 277.3096 -23.6895 1.8 13.1 175.2 1.0868 6.3 ------ UNKNOWN 243.7931 -48.6519 2.9 47.6 -158.1 1.4540 4.1 ------ UNKNOWN 237.1303 -39.1962 2.3 46.3 -143.7 2.0476 4.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.104000 15.128000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.1036 -15.7757 12.9 32.6 -111.2 -0.0759 -0.9 10.8 Sco X-1 254.2952 35.2940 4.2 51.2 -33.6 0.4673 2.7 8.5 Her X-1 255.9607 -37.8100 177.8 33.7 -155.8 -0.0039 -0.1 2.4 4U 1700-377 256.2821 -36.3748 3.6 32.5 -154.4 0.1871 3.2 7.9 GX 349+2 263.1785 -24.7104 7.4 20.0 -145.0 -0.0809 -1.6 9.5 GX 1+4 264.6144 -44.3051 6.0 35.6 -171.7 0.1275 1.9 10.3 4U 1735-44 268.1985 -1.5532 7.9 13.5 -56.8 0.0698 1.5 11.8 SW J1753.5-0127 270.2132 -25.0614 6.1 16.3 -161.7 -0.0975 -1.9 4.0 GX 5-1 270.2594 -25.8877 4.1 17.0 -163.2 0.1458 2.8 9.0 GRS 1758-258 273.8926 -14.1697 25.1 5.5 -138.7 0.0214 0.5 10.4 GX 17+2 275.7922 -30.1965 0.0 19.7 177.8 0.0625 1.2 12.3 H1820-303 284.9902 -25.0654 5.2 15.8 148.4 0.1030 2.2 9.0 HT1900.1-2455 288.6725 11.0736 4.6 24.1 17.4 0.1413 2.5 10.7 GRS 1915+105 299.6170 35.2145 4.2 50.1 14.4 0.4775 2.8 1.5 Cyg X-1 263.1401 -33.8969 12.4 27.0 -160.1 -0.0522 -0.9 8.4 GX 354-0 293.9204 2.4244 0.2 20.4 42.5 3.4421 61.9 ------ UNKNOWN 239.3152 2.3216 2.6 40.8 -82.2 0.8418 4.5 ------ UNKNOWN 236.7680 -7.7678 2.9 41.0 -98.1 0.8166 4.0 ------ UNKNOWN 245.6721 27.6740 2.3 49.6 -47.2 1.0503 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 539.488580 962.187100 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9811 -15.6470 0.6 41.0 -48.9 11.5038 19.7 0.4 Sco X-1 255.9859 -37.8232 0.6 22.2 -79.4 6.3206 20.4 1.3 4U 1700-377 256.5430 -36.5581 5.8 22.0 -75.9 0.6365 2.0 9.6 GX 349+2 262.9885 -24.7697 1.8 22.3 -40.8 1.6471 6.5 1.8 GX 1+4 264.5288 -44.4320 3.0 16.1 -100.9 0.9212 3.8 9.2 4U 1735-44 268.4046 -1.4178 2.7 39.3 -6.3 1.5670 4.3 3.0 SW J1753.5-0127 270.2812 -25.0868 1.5 17.4 -27.5 1.9183 7.6 0.5 GX 5-1 270.3951 -25.7267 3.8 16.9 -28.6 0.7848 3.2 5.1 GRS 1758-258 274.1028 -14.0275 3.2 25.5 -4.1 1.2650 3.6 5.7 GX 17+2 275.9611 -30.3305 2.5 10.2 -25.2 1.0886 4.6 2.9 H1820-303 285.0946 -25.0602 5.4 12.9 22.9 0.4794 2.1 9.0 HT1900.1-2455 288.8915 10.9651 4.1 49.1 25.3 -3.1178 -2.8 5.6 GRS 1915+105 262.8147 -33.7896 7.6 17.8 -63.9 0.3745 1.5 9.1 GX 354-0 332.2853 -55.7355 3.9 36.4 154.3 1.3300 3.0 ------ UNKNOWN 277.3305 -23.7920 1.7 15.3 -5.3 1.6422 6.8 ------ UNKNOWN 262.0704 13.6976 2.2 55.6 -7.1 4.4658 5.3 ------ UNKNOWN 251.9816 9.6302 3.0 56.3 -20.0 3.6817 3.9 ------ UNKNOWN 205.2942 -70.2636 2.7 51.0 -135.6 6.1264 4.3 ------ UNKNOWN