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 05:38:06 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger296503
======================================================================
Trigger: 00296503 Segment: 000
BAT Trigger Time: 216584613.888 [s; MET]
Trigger Stop: 216584614.144 [s; MET]
UTC: 2007-11-12T18:23:31.530800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 260.304966584962 Dec: -80.884395671755 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.92
Image Trigger?: NO
Rate S/N Ratio: 21.2837966537928 [ if not an image trigger ]
Image S/N Ratio: 7.92
Analysis Position: [ source = BAT ]
RA: 260.304966584962 Dec: -80.884395671755 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 260.198365400302 Dec: -80.8856828336721 [deg; J2000]
{ 17h 20m 47.6s , -80d 53' 08.5" }
+/- 2.27427999962638 [arcmin] (estimated 90% radius based on SNR)
+/- 1.04387724285579 [arcmin] (formal 1-sigma fit error)
SNR: 9.4046217717477
Angular difference between the analysis and refined position is 1.016178 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 0.303999960422516 +/- 0.090509661754147
Measured from: -0.0480000078678131
to: 0.255999952554703 [s; relative to TRIGTIME]
T50: 0.127999991178513 +/- 0.0715541736806378
Measured from: 0.0319999754428864
to: 0.159999966621399 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.380000025033951
to: 0.619999974966049 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0480000078678131
to: 0.27199998497963 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.003472 0.019186 0.028891 0.012145
0.003599 0.003947 0.003920 0.003318 [error]
Peak -0.001103 0.020936 0.025100 0.016070
0.006041 0.006241 0.005669 0.005004 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 0.320 -0.048 0.272
T90 0.304 -0.048 0.256
T50 0.128 0.032 0.160
Peak 1.000 -0.380 0.620
====== 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: 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 -0.705 -0.310 0.337 - - - 1.22e-02 -2.62e-03 2.55e-03 73.770 57
CPL 0.720 -1.398 2.432 124.383 -39.969 -124.383 4.19e-02 -4.19e-02 2.32e-01 71.070 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 -0.580 -0.500 0.614 - - - 3.83e-03 -1.38e-03 1.30e-03 54.680 57
CPL 0.442 -0.442 3.806 155.205 -155.205 -155.205 9.40e-03 -9.40e-03 1.60e-01 54.080 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 2.38e-09 7.15e-09 1.75e-08 1.20e-07 4.75e-08 1.47e-07 erg/cm2
90%_error_low -9.34e-10 -1.92e-09 -3.33e-09 -4.36e-08 -9.14e-09 -4.54e-08 erg/cm2
90%_error_hi 1.12e-09 1.91e-09 3.32e-09 5.88e-08 9.16e-09 5.88e-08 erg/cm2
Peak flux PL 6.58e-02 1.15e-01 1.54e-01 4.22e-01 4.48e-01 7.57e-01 ph/cm2/s
90%_error_low -4.09e-02 -5.29e-02 -4.30e-02 -2.03e-01 -1.37e-01 -2.30e-01 ph/cm2/s
90%_error_hi 5.81e-02 5.47e-02 4.30e-02 3.28e-01 1.41e-01 2.83e-01 ph/cm2/s
Fluence CPL 1.45e-09 7.20e-09 2.07e-08 3.68e-08 4.65e-08 6.61e-08 erg/cm2
90%_error_low -1.01e-09 -2.37e-09 -4.62e-09 -2.40e-08 -9.87e-09 -2.52e-08 erg/cm2
90%_error_hi 1.41e-09 2.24e-09 4.88e-09 8.85e-08 9.60e-09 5.37e-08 erg/cm2
Peak flux CPL 4.55e-02 1.14e-01 1.73e-01 2.00e-01 4.32e-01 5.32e-01 ph/cm2/s
90%_error_low -4.55e-02 -6.26e-02 -5.66e-02 -2.00e-01 -1.37e-01 -2.17e-01 ph/cm2/s
90%_error_hi 7.04e-02 6.12e-02 6.10e-02 3.14e-01 1.44e-01 3.53e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 260.1984 -80.8857 0.0203 32.8532 -173.2521 0.0685571 9.405 TRIG_00296503 Foreground time interval of the image: -0.048 0.272 (delta_t = 0.320 [sec]) Background time interval of the image: -239.888 -0.048 (delta_t = 239.840 [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 -0.048 sec. to 0.272 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.704718 ( -0.309942 0.337352 ) Norm@50keV : 1.21873E-02 ( -0.00262005 0.00254952 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 73.77 using 59 PHA bins. # Reduced chi-squared = 1.294 for 57 degrees of freedom # Null hypothesis probability = 6.680944e-02 Photon flux (15-150 keV) in 0.32 sec: 1.40821 ( -0.28174 0.28485 ) ph/cm2/s Energy fluence (15-150 keV) : 4.75085e-08 ( -9.14394e-09 9.1585e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.048 sec. to 0.272 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.720063 ( -1.40984 2.41986 ) Epeak [keV] : 124.383 ( -40.1472 -124.561 ) Norm@50keV : 4.19401E-02 ( -0.0427679 0.230748 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 71.07 using 59 PHA bins. # Reduced chi-squared = 1.269 for 56 degrees of freedom # Null hypothesis probability = 8.456543e-02 Photon flux (15-150 keV) in 0.32 sec: 1.34711 ( -0.2849 0.29033 ) ph/cm2/s Energy fluence (15-150 keV) : 4.65146e-08 ( -9.86573e-09 9.59926e-09 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.380 sec. to 0.620 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.580316 ( -0.500202 0.613959 ) Norm@50keV : 3.83036E-03 ( -0.00138213 0.00129647 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.68 using 59 PHA bins. # Reduced chi-squared = 0.9594 for 57 degrees of freedom # Null hypothesis probability = 5.624533e-01 Photon flux (15-150 keV) in 1 sec: 0.448318 ( -0.136781 0.141103 ) ph/cm2/s Energy fluence (15-150 keV) : 4.9455e-08 ( -1.39908e-08 1.40357e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.380 sec. to 0.620 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.441984 ( -0.444081 3.80357 ) Epeak [keV] : 155.205 ( -155.134 -155.134 ) Norm@50keV : 9.40424E-03 ( -0.00941281 0.160398 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.08 using 59 PHA bins. # Reduced chi-squared = 0.9657 for 56 degrees of freedom # Null hypothesis probability = 5.479725e-01 Photon flux (15-150 keV) in 1 sec: 0.432274 ( -0.136766 0.144446 ) ph/cm2/s Energy fluence (15-150 keV) : 4.81061e-08 ( -1.51868e-08 1.45928e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = N/A sec. Hardness ratio (energy fluence ratio) = N/A
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = N/A S(50-150 keV) = N/A
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 = -6.412966035483660E-01, IMY = 7.587889088522182E-02
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: -239.888000 -0.048000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 186.9479 -62.7212 5.4 54.5 -151.6 1.5712 2.1 8.5 GX 301-2 256.0502 -37.9244 3.6 31.7 -86.6 0.8923 3.3 5.7 4U 1700-377 256.4925 -36.3025 4.7 32.4 -83.8 0.6689 2.5 7.7 GX 349+2 263.1708 -24.7795 4.3 36.7 -62.3 -0.8851 -2.7 9.0 GX 1+4 264.8304 -44.3861 15.0 22.7 -91.0 0.1611 0.8 5.4 4U 1735-44 270.3250 -25.1090 3.7 32.7 -53.2 0.7185 3.1 2.8 GX 5-1 270.3918 -25.9072 0.0 32.0 -54.0 -0.2301 -1.0 11.0 GRS 1758-258 273.8612 -14.0316 13.3 41.0 -39.7 0.2575 0.9 8.4 GX 17+2 276.0129 -30.4512 2.2 25.5 -50.5 1.0224 5.2 6.8 H1820-303 285.0772 -24.8134 4.8 27.2 -28.6 -0.4452 -2.4 6.8 HT1900.1-2455 263.0213 -33.8065 4.2 30.0 -73.4 0.6396 2.8 2.3 GX 354-0 277.3614 -23.7941 1.5 30.7 -41.4 1.4974 7.5 ------ UNKNOWN 162.6042 -65.2212 2.9 59.4 -163.2 4.4547 4.0 ------ UNKNOWN 255.1171 -41.6473 1.9 30.2 -93.4 1.6060 6.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.048000 0.272000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 187.0370 -62.7258 10.1 54.4 -151.6 0.0276 1.1 10.8 GX 301-2 256.1518 -37.7969 114.3 31.7 -86.3 0.0011 0.1 8.3 4U 1700-377 256.4558 -36.2845 20.0 32.4 -83.8 0.0067 0.6 8.4 GX 349+2 263.1138 -24.8446 11.3 36.7 -62.4 0.0119 1.0 8.2 GX 1+4 264.6305 -44.5641 8.5 22.7 -91.6 0.0100 1.4 8.4 4U 1735-44 270.1334 -25.1808 13.8 32.7 -53.6 0.0076 0.8 10.2 GX 5-1 270.2135 -25.5791 0.0 32.4 -53.9 0.0078 0.9 11.0 GRS 1758-258 274.0986 -13.9880 8.7 41.0 -39.4 0.0142 1.3 6.1 GX 17+2 276.0295 -30.5133 27.5 25.4 -50.5 0.0029 0.4 10.3 H1820-303 285.1474 -25.0836 0.0 26.9 -28.6 0.0105 1.5 11.5 HT1900.1-2455 263.0744 -34.0124 0.0 29.8 -73.6 -0.0129 -1.4 11.5 GX 354-0 325.1395 -17.0595 2.9 40.0 40.3 0.0599 4.0 ------ UNKNOWN 24.7164 -76.5929 2.3 40.9 155.9 0.0535 5.0 ------ UNKNOWN 260.1984 -80.8857 1.2 32.9 -173.3 0.0686 9.4 ------ UNKNOWN 255.8065 -22.4735 2.9 42.7 -68.4 0.0927 4.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: -239.888000 482.183600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 186.6272 -62.8749 7.5 54.5 -151.9 -2.7115 -1.5 6.3 GX 301-2 255.9978 -37.9119 11.2 31.7 -86.6 0.6141 1.0 4.1 4U 1700-377 256.4141 -36.5334 6.2 32.3 -84.2 1.0695 1.9 6.7 GX 349+2 262.8978 -24.7833 5.3 36.8 -62.6 1.7701 2.2 6.5 GX 1+4 264.6374 -44.4407 10.2 22.8 -91.3 -0.5164 -1.1 4.6 4U 1735-44 270.4061 -25.0660 4.1 32.7 -53.1 1.4461 2.8 6.7 GX 5-1 270.2818 -25.7190 16.8 32.2 -53.9 -0.3590 -0.7 1.8 GRS 1758-258 274.0934 -14.1616 6.6 40.8 -39.5 1.0725 1.7 9.1 GX 17+2 275.9899 -30.4773 2.5 25.5 -50.5 1.8576 4.5 7.4 H1820-303 285.1108 -24.7827 4.7 27.2 -28.5 -0.8514 -2.5 9.2 HT1900.1-2455 262.9202 -33.7147 15.7 30.1 -73.3 0.3510 0.7 8.0 GX 354-0 124.8133 -72.7018 3.5 56.9 179.2 8.8034 3.3 ------ UNKNOWN 277.3985 -23.8155 2.2 30.7 -41.3 2.2164 5.3 ------ UNKNOWN 271.6841 -27.7527 2.8 29.8 -54.1 1.8849 4.1 ------ UNKNOWN 274.4068 -17.7607 2.6 37.4 -41.3 2.3223 4.4 ------ UNKNOWN 255.1263 -41.6528 1.9 30.2 -93.4 3.4126 6.0 ------ UNKNOWN