batgrbproduct Analysis for Trigger=662330
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sun Nov 1 01:22:02 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger662330/GCN5_download_cron
======================================================================
Trigger: 00662330 Segment: 000
BAT Trigger Time: 467963445.696 [s; MET]
Trigger Stop: 467963446.208 [s; MET]
UTC: 2015-10-31T05:50:30.348300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.198988567077 Dec: -39.0915640450626 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.43
Image Trigger?: NO
Rate S/N Ratio: 11.1803398874989 [ if not an image trigger ]
Image S/N Ratio: 7.43
Flight Position: [ source = BAT ]
RA: 83.198988567077 Dec: -39.0915640450626 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.1885573875565 Dec: -39.1245576984686 [deg; J2000]
{ 05h 32m 45.3s , -39d 07' 28.4" }
+/- 1.30742078779741 [arcmin] (estimated 90% radius based on SNR)
+/- 0.53327272180443 [arcmin] (formal 1-sigma fit error)
SNR: 20.7400923493746
Angular difference between Flight and Ground position is 2.038320 arcmin
Partial Coding Fraction: 0.6796875 [ including projection effects ]
Duration
T90: 5 +/- 2.23606797749979
Measured from: 0.30400013923645
to: 5.30400013923645 [s; relative to TRIGTIME]
T50: 2 +/- 1
Measured from: 1.30400013923645
to: 3.30400013923645 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.30400002002716
to: 2.30400002002716 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.304000020027161
to: 6.30400002002716 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.284143 0.227763 0.101004 0.008710
0.017356 0.017738 0.014769 0.012037 [error]
Peak 0.063283 0.076334 0.035960 0.006914
0.007435 0.007707 0.006346 0.005055 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== 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 Power-law 9.74e-08 1.04e-07 7.81e-08 9.58e-08 3.16e-07 3.75e-07 erg/cm2
Error 1.10e-08 9.08e-09 1.36e-08 3.20e-08 3.10e-08 4.95e-08 erg/cm2
Peak flux Power-law 7.53e-01 5.52e-01 2.69e-01 1.85e-01 1.66e+00 1.76e+00 ph/cm2/s
Error 1.24e-01 6.44e-02 5.16e-02 6.69e-02 1.94e-01 2.06e-01 ph/cm2/s
Fluence Cutoff-PL 9.65e-08 1.05e-07 7.67e-08 6.94e-08 3.10e-07 3.48e-07 erg/cm2
Error 1.17e-08 1.12e-08 1.55e-08 6.46e-08 3.60e-08 7.07e-08 erg/cm2
Peak flux Cutoff-PL 7.15e-01 5.97e-01 2.64e-01 7.71e-02 1.63e+00 1.65e+00 ph/cm2/s
Error 1.36e-01 6.86e-02 6.08e-02 1.20e-01 1.98e-01 2.25e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.407 0.180 - - 5.38e-03 6.76e-04 45.620 57
CPL 1.990 -0.735 1.0 0.6 9.51e-03 1.77e-03 45.870 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.039 0.213 - - 1.09e-02 1.59e-03 42.620 57
CPL 1.396 0.894 38.3 0.0 2.61e-02 0.00e+00 41.040 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the 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 PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 4.480000 sec.
T50 in the 50-300 keV band: 2.048000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 6.000 0.304 6.304
T90 5.000 0.304 5.304
T50 2.000 1.304 3.304
Peak 1.000 1.304 2.304
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
83.1886 -39.1246 0.0093 36.4 -170.6 0.6716 20.7 TRIG_00662330
------------------------------------------
Foreground time interval of the image:
0.304 6.304 (delta_t = 6.000 [sec])
Background time interval of the image:
-50.595 0.304 (delta_t = 50.899 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.304 sec. to 6.304 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.40683 ( -0.174807 0.185649 )
Norm@50keV : 5.38223E-03 ( -0.000682305 0.000670357 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.62 using 59 PHA bins.
# Reduced chi-squared = 0.8003 for 57 degrees of freedom
# Null hypothesis probability = 8.606049e-01
Photon flux (15-150 keV) in 6 sec: 0.999838 ( -0.0831354 0.0831786 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.15503e-07 ( -3.07292e-08 3.13039e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.304 sec. to 6.304 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98957 ( -0.519341 -1.98957 )
Epeak [keV] : 0.991121 ( -0.35233 0.823485 )
Norm@50keV : 9.51282E-03 ( -0.00161013 0.00192729 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.87 using 59 PHA bins.
# Reduced chi-squared = 0.8191 for 56 degrees of freedom
# Null hypothesis probability = 8.309574e-01
Photon flux (15-150 keV) in 6 sec: 0.993530 ( -0.086642 0.08635 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.10394e-07 ( -3.66666e-08 3.53064e-08 ) ergs/cm2
Band function
Time interval is from 0.304 sec. to 6.304 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.72385 ( -4.72385 -4.72385 )
beta : -2.52433 ( -0.239518 0.21024 )
Epeak [keV] : 19.8437 ( -6.68677 3.01798 )
Norm@50keV : 3489.73 ( -287.259 1.69663e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.96 using 59 PHA bins.
# Reduced chi-squared = 0.7993 for 55 degrees of freedom
# Null hypothesis probability = 8.571689e-01
Photon flux (15-150 keV) in 6 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.29308 (-0.760794 0.868578)
R^2/D10^2 : 1.51817 (-0.568837 0.908049)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.00 using 59 PHA bins.
# Reduced chi-squared = 1.403 for 57 degrees of freedom
# Null hypothesis probability = 2.394369e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.106e-08 1.134e-08
25- 50 1.200e-07 1.368e-08
50-150 2.302e-08 7.329e-09
15-150 2.241e-07 2.466e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 37.0801 (-7.51102 10.1917)
Norm : 6.68581 (-1.15473 1.46894)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.55 using 59 PHA bins.
# Reduced chi-squared = 0.8693 for 57 degrees of freedom
# Null hypothesis probability = 7.476895e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.966e-08 1.014e-08
25- 50 1.140e-07 1.143e-08
50-150 8.102e-08 2.120e-08
15-150 2.847e-07 3.078e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.95840 (-0.776055 0.836969)
R1^2/D10^2 : 6.29080 (-2.98702 6.74507)
kT2 [keV] : 18.2862 (-4.25895 6.95435)
R2^2/D10^2 : 2.35845E-02 (-0.0168593 0.0473105)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.02 using 59 PHA bins.
# Reduced chi-squared = 0.7640 for 55 degrees of freedom
# Null hypothesis probability = 9.007884e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.819e-08 2.935e-08
25- 50 1.009e-07 3.013e-08
50-150 1.097e-07 6.145e-08
15-150 3.088e-07 9.414e-08
Peak spectrum fit
Power-law model
Time interval is from 1.304 sec. to 2.304 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.03922 ( -0.206855 0.219867 )
Norm@50keV : 1.08713E-02 ( -0.00161283 0.00157373 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.62 using 59 PHA bins.
# Reduced chi-squared = 0.7476 for 57 degrees of freedom
# Null hypothesis probability = 9.217574e-01
Photon flux (15-150 keV) in 1 sec: 1.66081 ( -0.194377 0.194437 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00495e-07 ( -1.3726e-08 1.39802e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.304 sec. to 2.304 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39566 ( -1.11197 0.675753 )
Epeak [keV] : 38.2645 ( )
Norm@50keV : 2.60699E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.04 using 59 PHA bins.
# Reduced chi-squared = 0.7328 for 56 degrees of freedom
# Null hypothesis probability = 9.331319e-01
Photon flux (15-150 keV) in 1 sec: 1.63061 ( -0.19848 0.19851 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.4549e-08 ( -1.54363e-08 1.6061e-08 ) ergs/cm2
Band function
Time interval is from 1.304 sec. to 2.304 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.03906 ( -5.56074 -4.03906 )
beta : -2.33845 ( -0.463895 0.325615 )
Epeak [keV] : 25.6129 ( -5.37788 4.46547 )
Norm@50keV : 323.556 ( -323.555 360.793 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.22 using 59 PHA bins.
# Reduced chi-squared = 0.6949 for 55 degrees of freedom
# Null hypothesis probability = 9.585831e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.61509e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.12679 (-1.19227 1.40234)
R^2/D10^2 : 1.10916 (-0.475689 0.811179)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.50 using 59 PHA bins.
# Reduced chi-squared = 0.9386 for 57 degrees of freedom
# Null hypothesis probability = 6.071566e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.812e-08 3.305e-09
25- 50 3.935e-08 6.075e-09
50-150 1.567e-08 5.358e-09
15-150 7.313e-08 1.196e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.7752 (-17.5324 29.1567)
Norm : 8.70759 (-1.59643 1.9304)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.00 using 59 PHA bins.
# Reduced chi-squared = 0.7193 for 57 degrees of freedom
# Null hypothesis probability = 9.455787e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.193e-08 3.165e-09
25- 50 3.351e-08 4.595e-09
50-150 3.853e-08 1.292e-08
15-150 9.397e-08 1.635e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.42883 (-1.56358 1.68785)
R1^2/D10^2 : 3.35256 (-1.84668 5.38477)
kT2 [keV] : 22.3390 (-8.01544 28.4366)
R2^2/D10^2 : 2.00860E-02 (-0.0189002 0.104342)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.54 using 59 PHA bins.
# Reduced chi-squared = 0.7008 for 55 degrees of freedom
# Null hypothesis probability = 9.549417e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.204e-08 1.115e-08
25- 50 3.315e-08 1.680e-08
50-150 3.946e-08 2.325e-08
15-150 9.465e-08 4.670e-08
Plot creation:
Sun Nov 1 01:30:04 EDT 2015