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: Tue Sep 29 19:34:16 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger655097
======================================================================
Trigger: 00655097 Segment: 000
BAT Trigger Time: 463568704 [s; MET]
Trigger Stop: 463568768 [s; MET]
UTC: 2015-09-10T09:04:48.885620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 5.67522090431259 Dec: 33.4987706090102 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.08
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.08
Analysis Position: [ source = BAT ]
RA: 5.67522090431259 Dec: 33.4987706090102 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 5.67285779344216 Dec: 33.4688678561562 [deg; J2000]
{ 00h 22m 41.5s , +33d 28' 07.9" }
+/- 2.40580990939967 [arcmin] (estimated 90% radius based on SNR)
+/- 1.06325914131118 [arcmin] (formal 1-sigma fit error)
SNR: 8.67879373035347
Angular difference between the analysis and refined position is 1.798058 arcmin
Partial Coding Fraction: 0.1484375 [ including projection effects ]
Duration
T90: 112.272000014782 +/- 36.480140350695
Measured from: 1.80000001192093
to: 114.072000026703 [s; relative to TRIGTIME]
T50: 44.8800000548363 +/- 7.84367263018988
Measured from: 39.7680000066757
to: 84.648000061512 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 82.8920000195503
to: 83.8920000195503 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.783999979496
to: 147.560000002384 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.528121 2.738038 2.068408 0.453252
0.158834 0.164407 0.145012 0.129078 [error]
Peak 0.041456 0.029159 0.039736 0.039625
0.014396 0.015693 0.014304 0.012994 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 151.344 -3.784 147.560
T90 112.272 1.800 114.072
T50 44.880 39.768 84.648
Peak 1.000 82.892 83.892
====== 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 -1.379 -0.121 0.122 - - - 3.25e-03 -2.20e-04 2.20e-04 52.980 57
CPL -1.295 -0.197 0.226 433.782 -433.782 -433.782 3.57e-03 -5.35e-04 2.01e-03 53.020 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 -1.465 -0.980 0.902 - - - 8.67e-03 -3.78e-03 3.15e-03 54.820 57
CPL -1.547 -1.425 0.647 9999.330 N/A N/A 8.39e-03 N/A N/A 54.870 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 5.60e-07 1.11e-06 1.70e-06 5.74e-06 4.77e-06 9.11e-06 erg/cm2
90%_error_low -6.96e-08 -8.36e-08 -1.44e-07 -1.01e-06 -3.54e-07 -1.11e-06 erg/cm2
90%_error_hi 7.22e-08 8.30e-08 1.43e-07 1.15e-06 3.56e-07 1.23e-06 erg/cm2
Peak flux PL 3.44e-01 3.54e-01 2.57e-01 2.99e-01 1.07e+00 1.25e+00 ph/cm2/s
90%_error_low -3.44e-01 -1.63e-01 -1.48e-01 -2.45e-01 -3.88e-01 -4.56e-01 ph/cm2/s
90%_error_hi 2.81e-01 1.37e-01 1.22e-01 5.37e-01 3.92e-01 4.74e-01 ph/cm2/s
Fluence CPL 5.57e-07 1.11e-06 1.71e-06 5.70e-06 4.76e-06 8.80e-06 erg/cm2
90%_error_low -8.21e-08 -8.67e-08 -1.48e-07 -2.91e-06 -3.84e-07 -2.62e-06 erg/cm2
90%_error_hi 7.48e-08 9.62e-08 1.56e-07 6.72e-07 3.64e-07 2.42e-06 erg/cm2
Peak flux CPL 2.99e-01 1.92e-01 2.55e-01 2.91e-01 1.07e+00 1.22e+00 ph/cm2/s
90%_error_low -2.08e-01 -1.92e-01 N/A N/A N/A -4.33e-01 ph/cm2/s
90%_error_hi 3.06e-01 1.40e-02 N/A N/A N/A 5.09e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
5.6729 33.4689 0.0222 37.5224 121.0029 2.7972995 8.679 TRIG_00655097
Foreground time interval of the image:
-3.784 74.101 (delta_t = 77.885 [sec])
Background time interval of the image:
-239.000 -3.784 (delta_t = 235.216 [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 -3.784 sec. to 147.560 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.37869 ( -0.120801 0.121528 ) Norm@50keV : 3.24642E-03 ( -0.000220117 0.000219911 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.98 using 59 PHA bins. # Reduced chi-squared = 0.9294 for 57 degrees of freedom # Null hypothesis probability = 6.267780e-01 Photon flux (15-150 keV) in 151.3 sec: 0.393491 ( -0.027748 0.027824 ) ph/cm2/s Energy fluence (15-150 keV) : 4.76781e-06 ( -3.53744e-07 3.55951e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.784 sec. to 147.560 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.37542 ( -0.191833 0.230847 ) Epeak [keV] : 9994.26 ( -9992.86 -9992.86 ) Norm@50keV : 3.25859E-03 ( -0.000220935 0.00232566 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.97 using 59 PHA bins. # Reduced chi-squared = 0.9459 for 56 degrees of freedom # Null hypothesis probability = 5.901773e-01 Photon flux (15-150 keV) in 151.3 sec: 0.393116 ( -0.02896 0.028151 ) ph/cm2/s Energy fluence (15-150 keV) : 4.75575e-06 ( -3.83664e-07 3.64471e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 82.892 sec. to 83.892 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.46489 ( -0.981355 0.899888 ) Norm@50keV : 8.66601E-03 ( -0.00378127 0.00314329 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.82 using 59 PHA bins. # Reduced chi-squared = 0.9618 for 57 degrees of freedom # Null hypothesis probability = 5.571572e-01 Photon flux (15-150 keV) in 1 sec: 1.07159 ( -0.387888 0.39226 ) ph/cm2/s Energy fluence (15-150 keV) : 8.27904e-08 ( -3.63078e-08 3.5571e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 82.892 sec. to 83.892 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.36478 ( -0.605264 1.46586 ) Epeak [keV] : 128.278 ( ) Norm@50keV : 2.99096E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 53.19 using 59 PHA bins. # Reduced chi-squared = 0.9498 for 56 degrees of freedom # Null hypothesis probability = 5.820035e-01 Photon flux (15-150 keV) in 1 sec: 1.07338 ( ) ph/cm2/s Energy fluence (15-150 keV) : 4.18504e-08 ( 0 0 ) 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 = -3.955551478037332E-01, IMY = -6.582393415296779E-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: -239.000000 -3.784000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.6495 22.0097 0.4 30.9 -56.5 9.9409 31.9 0.9 Crab 5.7123 33.4555 1.7 37.5 121.0 4.5795 6.7 ------ UNKNOWN 64.3498 -13.4073 2.8 49.2 1.9 2.1324 4.1 ------ UNKNOWN 68.5703 -3.6496 2.8 41.2 -8.0 1.4379 4.2 ------ UNKNOWN 53.7912 53.1760 0.8 19.1 -156.4 3.8976 15.2 ------ UNKNOWN 75.0694 19.7722 2.8 25.6 -43.0 1.0529 4.2 ------ UNKNOWN 75.9970 40.5277 2.7 20.6 -96.3 1.0477 4.2 ------ UNKNOWN 83.6425 2.3117 2.4 43.9 -31.7 2.0581 4.8 ------ UNKNOWN 92.1214 60.1106 2.4 37.0 -128.3 1.7960 4.8 ------ UNKNOWN 95.6751 37.6210 3.7 35.8 -89.8 1.7084 3.2 ------ UNKNOWN 97.9525 19.6404 2.8 43.7 -64.1 4.8083 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -3.784000 74.100600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.4791 22.1086 4.6 30.7 -56.5 0.3928 2.5 10.3 Crab 5.6740 33.4735 1.3 37.5 121.0 2.9164 9.0 ------ UNKNOWN 7.1758 72.7376 2.2 44.5 -178.2 1.1106 5.2 ------ UNKNOWN 80.8629 86.3718 2.5 52.7 -158.9 1.4360 4.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 133.900600 963.151000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 299.5462 35.2655 3.5 53.6 175.6 7.5221 3.3 4.4 Cyg X-1 308.0662 40.9933 2.7 45.6 -179.3 4.4725 4.3 3.2 Cyg X-3 326.2685 38.4447 3.7 32.0 174.1 2.1253 3.1 8.7 Cyg X-2 319.9060 13.3215 2.8 46.1 139.1 9.9871 4.1 ------ UNKNOWN 332.6476 29.5135 3.0 28.3 154.8 2.8052 3.9 ------ UNKNOWN 44.2615 -0.7309 4.5 49.8 9.2 3.4798 2.6 ------ UNKNOWN 329.4214 32.4351 2.3 30.3 162.0 3.5546 5.0 ------ UNKNOWN 291.6525 42.4089 3.4 57.2 -173.8 10.0937 3.3 ------ UNKNOWN 288.0467 49.0084 4.0 57.7 -165.5 8.3714 2.9 ------ UNKNOWN 53.7393 53.1444 2.0 39.1 -71.2 8.8176 5.9 ------ UNKNOWN 286.7805 65.9830 3.0 55.3 -145.3 14.1328 4.0 ------ UNKNOWN 65.1300 41.3857 4.3 46.9 -54.0 6.4589 2.7 ------ UNKNOWN 347.3876 78.1653 2.9 45.4 -121.4 10.4289 3.9 ------ UNKNOWN 41.0542 69.9232 5.7 41.2 -98.7 5.9281 2.0 ------ UNKNOWN