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 01:18:58 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger313299
======================================================================
Trigger: 00313299 Segment: 000
BAT Trigger Time: 234402480.704 [s; MET]
Trigger Stop: 234402481.728 [s; MET]
UTC: 2008-06-05T23:47:57.859480 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 262.127299384762 Dec: 4.00166807477933 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 25.82
Image Trigger?: NO
Rate S/N Ratio: 120.743529847359 [ if not an image trigger ]
Image S/N Ratio: 25.82
Analysis Position: [ source = BAT ]
RA: 262.127299384762 Dec: 4.00166807477933 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 262.129984962012 Dec: 4.00907888034348 [deg; J2000]
{ 17h 28m 31.2s , +04d 00' 32.7" }
+/- 0.558082704217376 [arcmin] (estimated 90% radius based on SNR)
+/- 0.158187564979418 [arcmin] (formal 1-sigma fit error)
SNR: 69.9805860664166
Angular difference between the analysis and refined position is 0.472811 arcmin
Partial Coding Fraction: 0.4140625 [ including projection effects ]
Duration
T90: 18.055999994278 +/- 0.888225208353073
Measured from: -2.80399999022484
to: 15.2520000040531 [s; relative to TRIGTIME]
T50: 7.06000000238419 +/- 0.116275537741645
Measured from: 2.31600001454353
to: 9.37600001692772 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.57199999690056
to: 8.57199999690056 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.53200000524521
to: 22.5760000050068 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.289878 7.224310 6.262940 1.831162
0.060148 0.069483 0.068050 0.057761 [error]
Peak 0.395359 0.835084 0.926597 0.355922
0.015363 0.020385 0.022146 0.017162 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 28.108 -5.532 22.576
T90 18.056 -2.804 15.252
T50 7.060 2.316 9.376
Peak 1.000 7.572 8.572
====== 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: CPL)
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 -1.324 -0.030 0.030 - - - 4.90e-02 -7.83e-04 7.82e-04 37.900 57
CPL -1.146 -0.119 0.122 290.697 -92.583 421.177 5.81e-02 -6.09e-03 6.97e-03 31.320 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 -0.938 -0.049 0.049 - - - 1.73e-01 -4.85e-03 4.84e-03 42.370 57
CPL -0.714 -0.179 0.198 344.136 -132.467 1290.214 2.16e-01 -3.33e-02 4.51e-02 38.290 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 1.49e-06 3.06e-06 4.88e-06 1.74e-05 1.35e-05 2.68e-05 erg/cm2
90%_error_low -5.23e-08 -6.27e-08 -8.33e-08 -7.00e-07 -2.13e-07 -7.24e-07 erg/cm2
90%_error_hi 5.31e-08 6.26e-08 8.30e-08 7.21e-07 2.13e-07 7.41e-07 erg/cm2
Peak flux PL 1.58e-03 1.91e-02 2.53e-01 2.23e+01 9.40e-01 2.21e+01 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 1.41e-06 3.07e-06 4.97e-06 1.42e-05 1.34e-05 2.36e-05 erg/cm2
90%_error_low -7.15e-08 -6.42e-08 -1.02e-07 -1.77e-06 -2.27e-07 -1.77e-06 erg/cm2
90%_error_hi 7.28e-08 6.42e-08 1.03e-07 2.08e-06 2.26e-07 2.07e-06 erg/cm2
Peak flux CPL 3.91e+00 5.93e+00 6.31e+00 9.49e+00 1.97e+01 2.56e+01 ph/cm2/s
90%_error_low -3.19e-01 -2.18e-01 -2.32e-01 -1.57e+00 -5.81e-01 -1.68e+00 ph/cm2/s
90%_error_hi 3.26e-01 2.19e-01 2.34e-01 1.89e+00 5.81e-01 1.97e+00 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 262.1300 4.0091 0.0027 29.5847 63.8919 17.4523451 69.981 TRIG_00313299 Foreground time interval of the image: -5.532 11.197 (delta_t = 16.729 [sec]) Background time interval of the image: -219.803 -5.532 (delta_t = 214.271 [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 -5.532 sec. to 22.576 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.32397 ( -0.0296608 0.0297382 ) Norm@50keV : 4.90480E-02 ( -0.000782837 0.000782077 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 37.90 using 59 PHA bins. # Reduced chi-squared = 0.6649 for 57 degrees of freedom # Null hypothesis probability = 9.758903e-01 Photon flux (15-150 keV) in 28.11 sec: 5.87823 ( -0.1072 0.10755 ) ph/cm2/s Energy fluence (15-150 keV) : 1.35482e-05 ( -2.13244e-07 2.13167e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.532 sec. to 22.576 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.14606 ( -0.118705 0.121858 ) Epeak [keV] : 290.697 ( -92.5843 421.176 ) Norm@50keV : 5.81264E-02 ( -0.00609048 0.00696946 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 31.32 using 59 PHA bins. # Reduced chi-squared = 0.5592 for 56 degrees of freedom # Null hypothesis probability = 9.969155e-01 Photon flux (15-150 keV) in 28.11 sec: 5.79319 ( -0.11947 0.12012 ) ph/cm2/s Energy fluence (15-150 keV) : 1.34339e-05 ( -2.26955e-07 2.26466e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 7.572 sec. to 8.572 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.937964 ( -0.0490162 0.0492884 ) Norm@50keV : 0.173330 ( -0.00485224 0.0048458 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 42.37 using 59 PHA bins. # Reduced chi-squared = 0.7434 for 57 degrees of freedom # Null hypothesis probability = 9.257152e-01 Photon flux (15-150 keV) in 1 sec: 0.939685 ( ) ph/cm2/s Energy fluence (15-150 keV) : 1.91743e-06 ( -5.74426e-08 5.75377e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.572 sec. to 8.572 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.714137 ( -0.179312 0.198396 ) Epeak [keV] : 344.136 ( -132.467 1290.21 ) Norm@50keV : 0.216077 ( -0.0333371 0.045077 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 38.29 using 59 PHA bins. # Reduced chi-squared = 0.6838 for 56 degrees of freedom # Null hypothesis probability = 9.661218e-01 Photon flux (15-150 keV) in 1 sec: 19.7281 ( -0.5808 0.5813 ) ph/cm2/s Energy fluence (15-150 keV) : 1.90204e-06 ( -5.96142e-08 5.94225e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 18.056 sec. Hardness ratio (energy fluence ratio) = 1.62102679449
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 4.482836e-06 S(50-150 keV) = 8.951016e-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 = 2.498364785083470E-01, IMY = -5.097982982999856E-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: -219.803410 -5.532000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.0034 -15.6498 0.8 37.1 110.3 7.5159 13.7 1.5 Sco X-1 254.4346 35.3262 1.5 21.3 -14.3 1.6594 7.5 1.5 Her X-1 268.4301 -1.3367 6.8 37.8 64.8 1.0499 1.7 7.9 SW J1753.5-0127 299.6074 35.1990 2.0 56.4 3.9 6.8948 5.8 0.9 Cyg X-1 212.0848 24.8825 2.7 23.3 -131.5 0.8574 4.3 ------ UNKNOWN 293.5407 51.9597 2.4 53.5 -17.0 2.7587 4.9 ------ UNKNOWN 244.0644 67.4243 2.9 47.1 -53.1 4.2156 4.0 ------ UNKNOWN 197.6791 46.5417 4.2 41.1 -98.3 3.0053 2.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -5.532000 11.196600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.1713 -15.6784 9.6 37.2 110.0 -0.5457 -1.2 11.3 Sco X-1 254.3361 35.2046 4.8 21.1 -14.2 0.3220 2.4 10.2 Her X-1 268.3713 -1.4834 29.9 37.9 65.1 -0.1732 -0.4 1.9 SW J1753.5-0127 299.5999 35.1838 11.1 56.4 3.9 1.0194 1.0 1.2 Cyg X-1 262.1300 4.0091 0.2 29.6 63.9 17.4519 70.0 ------ UNKNOWN 274.9777 23.8499 2.5 35.3 20.7 0.9198 4.5 ------ UNKNOWN 199.6916 31.9162 2.9 35.1 -120.2 0.5972 3.9 ------ UNKNOWN 191.0566 26.6415 2.9 42.3 -129.4 0.6583 4.0 ------ UNKNOWN 263.8307 68.5306 3.7 50.7 -44.5 1.5351 3.2 ------ UNKNOWN 189.7737 35.8379 3.8 43.8 -116.0 1.2331 3.1 ------ UNKNOWN 186.7048 30.5654 3.1 46.0 -123.7 1.6214 3.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 78.596600 962.359200 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9900 -15.6342 0.3 25.9 115.2 31.3001 36.7 0.7 Sco X-1 254.4738 35.3300 1.6 32.1 -117.0 7.9137 7.0 1.1 Her X-1 262.9070 -24.5948 9.7 28.6 73.3 1.0890 1.2 10.6 GX 1+4 268.3213 -1.4360 3.5 8.2 25.9 2.1550 3.2 3.0 SW J1753.5-0127 270.3055 -25.1157 2.2 30.2 59.9 5.0382 5.2 2.5 GX 5-1 270.3137 -25.7101 3.2 30.7 60.2 3.5951 3.6 2.1 GRS 1758-258 273.9251 -14.1494 4.0 21.6 42.2 1.8685 2.8 8.2 GX 17+2 275.9216 -30.2709 4.3 36.7 54.6 3.6367 2.7 5.8 H1820-303 285.0331 -25.0534 13.1 36.6 38.5 0.9276 0.9 8.0 HT1900.1-2455 288.7949 10.9387 0.6 27.3 -31.5 12.3296 20.2 0.5 GRS 1915+105 262.9474 -33.8358 10.6 37.8 73.7 2.4974 1.1 2.1 GX 354-0 266.8521 -27.3220 1.0 31.6 66.8 12.7145 11.4 ------ UNKNOWN 310.2729 24.9210 5.1 50.7 -44.5 10.1912 2.3 ------ UNKNOWN