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 Feb 13 10:43:26 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger733103
======================================================================
Trigger: 00733103 Segment: 000
BAT Trigger Time: 506206226.56 [s; MET]
Trigger Stop: 506206234.752 [s; MET]
UTC: 2017-01-15T20:50:08.094080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 332.15417811853 Dec: 13.7808240200914 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.53
Image Trigger?: NO
Rate S/N Ratio: 8.60232526704263 [ if not an image trigger ]
Image S/N Ratio: 7.53
Analysis Position: [ source = BAT ]
RA: 332.15417811853 Dec: 13.7808240200914 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 332.149281035963 Dec: 13.7556910633252 [deg; J2000]
{ 22h 08m 35.8s , +13d 45' 20.5" }
+/- 1.95410541920048 [arcmin] (estimated 90% radius based on SNR)
+/- 0.98713010812511 [arcmin] (formal 1-sigma fit error)
SNR: 11.680956201076
Angular difference between the analysis and refined position is 1.534744 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 32.0439999699593 +/- 9.1692202217165
Measured from: 3.95999997854233
to: 36.0039999485016 [s; relative to TRIGTIME]
T50: 18.6559999585152 +/- 6.77339971292067
Measured from: 8.95999997854233
to: 27.6159999370575 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.97200000286102
to: 5.97200000286102 [s; relative to TRIGTIME]
Total Fluence
Measured from: 2.94800001382828
to: 52.4959999918938 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.242114 0.284689 0.212424 0.047533
0.036665 0.038416 0.033877 0.030255 [error]
Peak 0.010984 0.013753 0.013038 0.012837
0.005360 0.005621 0.004899 0.004397 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 49.548 2.948 52.496
T90 32.044 3.960 36.004
T50 18.656 8.960 27.616
Peak 1.000 4.972 5.972
====== 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 -1.458 -0.248 0.245 - - - 9.91e-04 -1.47e-04 1.45e-04 43.390 57
CPL -1.232 -0.922 1.060 157.820 -157.820 -157.820 1.31e-03 -4.63e-04 3.50e-03 43.210 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 -1.363 -0.787 0.754 - - - 2.52e-03 -1.07e-03 1.03e-03 49.520 57
CPL -0.782 -7.124 8.870 107.707 -107.707 -107.707 4.88e-03 -4.88e-03 3.82e+01 49.420 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 6.03e-08 1.14e-07 1.65e-07 5.13e-07 4.69e-07 8.53e-07 erg/cm2
90%_error_low -1.35e-08 -1.63e-08 -3.23e-08 -1.83e-07 -7.73e-08 -2.14e-07 erg/cm2
90%_error_hi 1.41e-08 1.62e-08 3.22e-08 2.43e-07 7.89e-08 2.65e-07 erg/cm2
Peak flux PL 9.10e-02 9.94e-02 7.73e-02 9.86e-02 3.05e-01 3.66e-01 ph/cm2/s
90%_error_low -5.63e-02 -4.41e-02 -7.73e-02 -9.86e-02 -1.22e-01 -1.51e-01 ph/cm2/s
90%_error_hi 6.88e-02 4.21e-02 3.91e-02 1.50e-01 1.23e-01 1.62e-01 ph/cm2/s
Fluence CPL 5.87e-08 1.17e-07 1.67e-07 3.42e-07 4.58e-07 6.84e-07 erg/cm2
90%_error_low -1.51e-08 -1.90e-08 -3.34e-08 -2.63e-07 -8.98e-08 -2.83e-07 erg/cm2
90%_error_hi 1.46e-08 2.16e-08 3.40e-08 2.22e-07 8.72e-08 2.46e-07 erg/cm2
Peak flux CPL 8.12e-02 1.04e-01 8.12e-02 5.35e-02 2.97e-01 3.21e-01 ph/cm2/s
90%_error_low N/A -4.82e-02 -4.36e-02 -5.35e-02 -1.40e-01 -1.63e-01 ph/cm2/s
90%_error_hi N/A 5.63e-02 4.93e-02 8.07e-02 1.28e-01 2.01e-01 ph/cm2/s
======================================================================
Image
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 2.948 sec. to 52.496 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.45813 ( -0.24752 0.245044 ) Norm@50keV : 9.91111E-04 ( -0.000147034 0.000145157 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.39 using 59 PHA bins. # Reduced chi-squared = 0.7613 for 57 degrees of freedom # Null hypothesis probability = 9.080462e-01 Photon flux (15-150 keV) in 49.55 sec: 0.122392 ( -0.017167 0.017174 ) ph/cm2/s Energy fluence (15-150 keV) : 4.69303e-07 ( -7.72603e-08 7.89024e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.948 sec. to 52.496 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.23155 ( -0.921619 1.05967 ) Epeak [keV] : 157.820 ( -157.837 -157.837 ) Norm@50keV : 1.31396E-03 ( -0.000462553 0.0035023 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.21 using 59 PHA bins. # Reduced chi-squared = 0.7716 for 56 degrees of freedom # Null hypothesis probability = 8.944944e-01 Photon flux (15-150 keV) in 49.55 sec: 0.121284 ( -0.017752 0.017664 ) ph/cm2/s Energy fluence (15-150 keV) : 4.57819e-07 ( -8.98223e-08 8.72154e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 4.972 sec. to 5.972 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.36328 ( -0.787455 0.754033 ) Norm@50keV : 2.52162E-03 ( -0.00106654 0.00102644 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.52 using 59 PHA bins. # Reduced chi-squared = 0.8687 for 57 degrees of freedom # Null hypothesis probability = 7.489084e-01 Photon flux (15-150 keV) in 1 sec: 0.304630 ( -0.122393 0.122735 ) ph/cm2/s Energy fluence (15-150 keV) : 2.45584e-08 ( -1.11752e-08 1.17419e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.972 sec. to 5.972 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.782088 ( -7.12595 8.8684 ) Epeak [keV] : 107.707 ( -107.523 -107.523 ) Norm@50keV : 4.87775E-03 ( -0.00489039 38.2174 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.42 using 59 PHA bins. # Reduced chi-squared = 0.8825 for 56 degrees of freedom # Null hypothesis probability = 7.203853e-01 Photon flux (15-150 keV) in 1 sec: 0.296784 ( -0.139673 0.127813 ) ph/cm2/s Energy fluence (15-150 keV) : 2.35451e-08 ( -1.17122e-08 1.25094e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 32.044 sec. Hardness ratio (energy fluence ratio) = 1.45589477314
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.7396211e-07 S(50-150 keV) = 2.953464e-07
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.
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: -239.560000 2.948000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 288.7887 10.8994 2.0 48.3 -34.5 2.9016 5.7 2.8 GRS 1915+105 299.5856 35.2070 0.4 42.0 1.8 8.3086 26.8 0.4 Cyg X-1 308.0991 40.9633 2.2 39.3 14.7 1.5831 5.2 0.8 Cyg X-3 326.2812 38.4039 6.1 28.6 31.7 0.4551 1.9 7.1 Cyg X-2 318.3584 21.2682 2.9 21.1 -9.5 0.8738 4.0 ------ UNKNOWN 334.6925 -4.1734 2.8 16.3 -116.4 0.8959 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 2.948000 51.740590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 288.9177 11.0019 3.8 48.2 -34.4 0.5842 3.0 7.8 GRS 1915+105 299.6889 35.0768 23.5 41.8 1.6 -0.0609 -0.5 8.9 Cyg X-1 307.9450 40.9435 4.5 39.4 14.6 0.2998 2.5 7.5 Cyg X-3 326.1157 38.1889 5.1 28.5 31.3 -0.2071 -2.2 8.4 Cyg X-2 332.1493 13.7557 1.0 6.1 -19.4 0.8701 11.7 ------ UNKNOWN 354.1235 -37.3448 2.4 51.4 -145.0 1.4697 4.8 ------ UNKNOWN 279.6721 13.0125 2.2 57.0 -30.7 2.4571 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 79.740590 422.670000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 288.7958 10.9660 2.2 42.4 -43.3 1.5746 5.2 1.2 GRS 1915+105 299.5845 35.2158 0.6 36.3 -2.5 4.5256 20.8 0.9 Cyg X-1 308.1480 40.9890 4.1 34.3 12.5 0.5862 2.8 2.8 Cyg X-3 325.9013 38.3130 0.0 25.1 33.9 -0.3902 -2.2 12.7 Cyg X-2 327.1813 25.7272 2.6 12.8 24.9 0.6983 4.5 ------ UNKNOWN 291.5253 -3.0680 2.4 43.7 -64.2 3.3462 4.9 ------ UNKNOWN 321.2655 -30.3474 2.3 45.4 -121.2 3.1944 4.9 ------ UNKNOWN