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: Wed Jan 22 20:54:57 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger150532
======================================================================
Trigger: 00150532 Segment: 000
BAT Trigger Time: 145819518.4 [s; MET]
Trigger Stop: 145819520.448 [s; MET]
UTC: 2005-08-15T17:25:18.723840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 293.574656755954 Dec: 9.16636481502104 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.78
Image Trigger?: NO
Rate S/N Ratio: 12.6095202129185 [ if not an image trigger ]
Image S/N Ratio: 8.78
Analysis Position: [ source = BAT ]
RA: 293.574656755954 Dec: 9.16636481502104 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 293.586029591279 Dec: 9.13916585505451 [deg; J2000]
{ 19h 34m 20.6s , +09d 08' 21.0" }
+/- 2.02346551917523 [arcmin] (estimated 90% radius based on SNR)
+/- 1.05251402914945 [arcmin] (formal 1-sigma fit error)
SNR: 11.1131878127321
Angular difference between the analysis and refined position is 1.765522 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 2.99200001358986 +/- 0.614751980694982
Measured from: -0.527999997138977
to: 2.46400001645088 [s; relative to TRIGTIME]
T50: 1.57600000500679 +/- 0.455385567529134
Measured from: 0.167999982833862
to: 1.74399998784065 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0999999940395355
to: 0.900000005960464 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.72800001502037
to: 2.72400000691414 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.061182 0.081721 0.038575 0.007388
0.009620 0.009637 0.008107 0.006604 [error]
Peak 0.022093 0.026531 0.018884 0.004788
0.005127 0.005140 0.004431 0.003492 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 3.452 -0.728 2.724
T90 2.992 -0.528 2.464
T50 1.576 0.168 1.744
Peak 1.000 -0.100 0.900
====== 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 -1.815 -0.249 0.236 - - - 3.09e-03 -5.34e-04 5.24e-04 62.540 57
CPL 0.405 -1.333 1.720 43.627 -6.993 11.636 6.21e-02 -6.21e-02 5.74e-01 53.330 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 -1.637 -0.361 0.344 - - - 4.15e-03 -9.73e-04 9.51e-04 35.740 57
CPL -0.319 -1.365 2.213 55.718 -12.787 -55.718 2.27e-02 -2.27e-02 3.84e-01 33.590 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 1.83e-08 2.78e-08 3.16e-08 6.85e-08 9.82e-08 1.46e-07 erg/cm2
90%_error_low -3.60e-09 -4.05e-09 -7.08e-09 -2.59e-08 -1.69e-08 -3.49e-08 erg/cm2
90%_error_hi 3.70e-09 4.04e-09 7.27e-09 3.46e-08 1.74e-08 4.17e-08 erg/cm2
Peak flux PL 1.95e-01 1.81e-01 1.16e-01 1.15e-01 5.40e-01 6.08e-01 ph/cm2/s
90%_error_low -5.94e-02 -3.86e-02 -3.40e-02 -5.43e-02 -1.14e-01 -1.31e-01 ph/cm2/s
90%_error_hi 6.34e-02 3.84e-02 3.43e-02 7.73e-02 1.14e-01 1.33e-01 ph/cm2/s
Fluence CPL 1.55e-08 3.56e-08 2.69e-08 4.22e-09 8.18e-08 8.23e-08 erg/cm2
90%_error_low -4.25e-09 -6.01e-09 -9.56e-09 -3.51e-09 -1.48e-08 -1.52e-08 erg/cm2
90%_error_hi 4.26e-09 6.17e-09 9.57e-09 1.40e-08 1.72e-08 2.06e-08 erg/cm2
Peak flux CPL 1.68e-01 2.10e-01 1.18e-01 2.72e-02 5.18e-01 5.24e-01 ph/cm2/s
90%_error_low -6.91e-02 -5.14e-02 -4.50e-02 -2.72e-02 -1.15e-01 -1.20e-01 ph/cm2/s
90%_error_hi 7.13e-02 5.52e-02 4.12e-02 1.12e-01 1.16e-01 1.44e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 293.5860 9.1392 0.0173 8.2108 31.9231 0.1986825 11.113 TRIG_00150532 Foreground time interval of the image: -0.728 2.724 (delta_t = 3.452 [sec]) Background time interval of the image: -299.400 -0.728 (delta_t = 298.672 [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 -0.728 sec. to 2.724 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.81522 ( -0.248688 0.236289 ) Norm@50keV : 3.09043E-03 ( -0.000533724 0.00052449 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 62.54 using 59 PHA bins. # Reduced chi-squared = 1.097 for 57 degrees of freedom # Null hypothesis probability = 2.861251e-01 Photon flux (15-150 keV) in 3.452 sec: 0.428417 ( -0.06229 0.062295 ) ph/cm2/s Energy fluence (15-150 keV) : 9.81728e-08 ( -1.6899e-08 1.73747e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.728 sec. to 2.724 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.40477 ( -1.33674 1.71603 ) Epeak [keV] : 43.6273 ( -6.98248 11.6466 ) Norm@50keV : 6.21156E-02 ( -0.0625673 0.573701 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 53.33 using 59 PHA bins. # Reduced chi-squared = 0.9523 for 56 degrees of freedom # Null hypothesis probability = 5.765859e-01 Photon flux (15-150 keV) in 3.452 sec: 0.405077 ( -0.061773 0.062394 ) ph/cm2/s Energy fluence (15-150 keV) : 8.18373e-08 ( -1.4773e-08 1.71891e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.100 sec. to 0.900 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.63671 ( -0.36093 0.343479 ) Norm@50keV : 4.15299E-03 ( -0.00097286 0.000951044 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 35.74 using 59 PHA bins. # Reduced chi-squared = 0.6270 for 57 degrees of freedom # Null hypothesis probability = 9.877017e-01 Photon flux (15-150 keV) in 1 sec: 0.539945 ( -0.113817 0.113868 ) ph/cm2/s Energy fluence (15-150 keV) : 3.86839e-08 ( -9.43295e-09 9.73222e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.100 sec. to 0.900 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.319406 ( -1.36607 2.21189 ) Epeak [keV] : 55.7178 ( -12.7618 -55.6928 ) Norm@50keV : 2.26986E-02 ( -0.0227505 0.383495 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 33.59 using 59 PHA bins. # Reduced chi-squared = 0.5998 for 56 degrees of freedom # Null hypothesis probability = 9.923956e-01 Photon flux (15-150 keV) in 1 sec: 0.518347 ( -0.11548 0.116352 ) ph/cm2/s Energy fluence (15-150 keV) : 3.42531e-08 ( -9.5165e-09 1.08691e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 2.992 sec. Hardness ratio (energy fluence ratio) = 1.13658024058
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 4.61301e-08 S(50-150 keV) = 5.204562e-08
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 = 1.224717432326633E-01, IMY = -7.630036168813809E-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: -299.400000 -0.728000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9848 -15.6504 0.7 45.9 -147.3 7.8651 15.5 0.7 Sco X-1 254.3973 35.4716 9.8 42.1 -69.4 1.2367 1.2 8.3 Her X-1 256.0847 -37.8969 8.6 51.5 -179.0 0.8404 1.3 5.6 4U 1700-377 256.4302 -36.5018 4.7 50.2 -178.1 -1.3542 -2.5 4.7 GX 349+2 263.1073 -24.8279 6.2 37.6 -173.6 0.4860 1.9 7.3 GX 1+4 264.8693 -44.4896 5.8 53.3 169.5 1.8014 2.0 5.9 4U 1735-44 268.3649 -1.4411 1.2 19.1 -139.5 2.1479 9.5 0.7 SW J1753.5-0127 270.1869 -24.9866 5.1 34.1 177.2 0.6322 2.3 7.7 GX 5-1 270.2614 -25.7250 2.9 34.7 176.5 1.1047 4.0 2.5 GRS 1758-258 274.0070 -14.0910 3.6 22.9 -177.4 0.6868 3.2 3.3 GX 17+2 276.0080 -30.3730 3.6 37.0 165.4 1.0896 3.2 4.3 H1820-303 285.0741 -24.9923 8.4 30.3 152.7 0.4237 1.4 4.8 HT1900.1-2455 288.9193 10.8529 7.3 6.2 -4.7 -0.3119 -1.6 9.0 GRS 1915+105 299.5904 35.2059 0.3 32.4 -8.9 9.6589 37.3 0.3 Cyg X-1 308.1116 40.9741 2.4 40.7 -4.0 1.5935 4.7 1.3 Cyg X-3 326.2560 38.2428 5.8 49.0 12.5 1.1819 2.0 6.2 Cyg X-2 262.9033 -33.8001 4.8 44.9 178.4 0.9770 2.4 4.8 GX 354-0 323.8145 33.7631 3.2 45.0 16.3 1.5899 3.6 ------ UNKNOWN 319.9487 48.0504 3.2 51.5 -1.2 1.8610 3.5 ------ UNKNOWN 243.8081 -31.2348 2.7 54.5 -164.3 2.9460 4.3 ------ UNKNOWN 240.3290 -35.0256 2.7 59.1 -166.1 6.4652 4.2 ------ UNKNOWN UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.728000 2.724000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.0227 -15.4917 6.8 45.8 -147.1 -0.0684 -1.7 9.3 Sco X-1 254.2228 35.2624 0.0 42.1 -69.7 0.0944 1.3 12.5 Her X-1 255.9931 -37.7242 10.1 51.4 -178.8 0.0544 1.1 7.2 4U 1700-377 256.3949 -36.4605 4.2 50.2 -178.0 0.1080 2.7 3.0 GX 349+2 263.0295 -24.9409 300.4 37.7 -173.6 -0.0009 -0.0 11.8 GX 1+4 264.8471 -44.4870 7.4 53.3 169.5 0.1170 1.6 5.0 4U 1735-44 268.3703 -1.6157 4.2 19.2 -140.0 0.0488 2.7 9.8 SW J1753.5-0127 270.1094 -25.0949 7.7 34.2 177.2 0.0343 1.5 9.5 GX 5-1 270.2110 -25.6435 4.5 34.6 176.6 -0.0595 -2.6 7.8 GRS 1758-258 273.8775 -13.9754 4.8 22.8 -177.0 0.0436 2.4 8.3 GX 17+2 276.1194 -30.3411 6.2 36.9 165.2 -0.0486 -1.9 10.2 H1820-303 284.8138 -24.9834 0.0 30.3 153.2 -0.0208 -0.9 12.7 HT1900.1-2455 288.8541 10.7414 0.0 6.0 -4.8 0.0045 0.3 12.7 GRS 1915+105 299.5386 35.1871 3.2 32.3 -9.0 -0.0732 -3.6 2.7 Cyg X-1 307.8809 40.9228 3.5 40.6 -4.2 0.0869 3.3 10.5 Cyg X-3 326.3452 38.3279 21.7 49.1 12.4 -0.0254 -0.5 8.2 Cyg X-2 262.9227 -33.9353 7.6 45.0 178.3 -0.0520 -1.5 6.9 GX 354-0 304.6244 -30.7136 2.4 40.0 125.7 0.2674 4.8 ------ UNKNOWN 293.5861 9.1391 1.0 8.2 31.9 0.1988 11.1 ------ UNKNOWN 286.7115 2.2640 2.3 3.0 142.5 0.0858 5.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 53.300600 122.651300 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.0900 -15.6582 23.2 54.1 -152.8 0.1583 0.5 6.5 Sco X-1 256.4255 -36.5424 4.2 57.5 179.4 -1.4773 -2.7 7.2 GX 349+2 262.9210 -24.8486 5.5 45.3 -175.1 0.3060 2.1 7.8 GX 1+4 268.3671 -1.4458 1.7 27.3 -147.4 0.5911 6.6 0.4 SW J1753.5-0127 270.2539 -25.2490 25.4 41.2 177.2 0.0605 0.5 10.3 GX 5-1 270.5014 -25.7061 5.1 41.5 176.5 -0.3073 -2.3 11.0 GRS 1758-258 273.9532 -13.9902 3.5 30.3 -175.4 0.2917 3.3 4.1 GX 17+2 275.9364 -30.3682 9.0 43.0 166.8 0.1961 1.3 0.6 H1820-303 285.1776 -24.9668 6.5 35.1 157.6 0.2316 1.8 8.2 HT1900.1-2455 288.5990 10.9001 7.7 5.2 -106.0 0.1232 1.5 12.1 GRS 1915+105 299.6048 35.2060 0.5 26.6 -24.7 2.1622 25.3 0.8 Cyg X-1 308.1046 40.9424 2.0 34.3 -16.1 0.5788 5.8 0.7 Cyg X-3 326.1611 38.3299 50.5 41.3 4.0 -0.0307 -0.2 0.7 Cyg X-2 263.0932 -33.8145 4.6 51.8 176.7 0.6070 2.5 5.3 GX 354-0 314.4193 -19.7835 2.0 35.5 109.0 1.0878 5.6 ------ UNKNOWN 284.3060 20.6202 2.4 14.5 -72.7 0.3769 4.8 ------ UNKNOWN 274.4097 55.0103 2.5 48.3 -50.4 1.9373 4.6 ------ UNKNOWN