batgrbproduct analysis for trigger=960102
batgrbproduct Analysis for Trigger=960102
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 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sun Mar 8 23:30:31 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger960102/batgroup_hand_proc
======================================================================
Trigger: 00960102 Segment: 000
BAT Trigger Time: 605227863.616 [s; MET]
Trigger Stop: 605227867.712 [s; MET]
UTC: 2020-03-06T22:50:39.061800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 198.58161324179 Dec: 11.2550650612691 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.35
Image Trigger?: NO
Rate S/N Ratio: 14.1067359796659 [ if not an image trigger ]
Image S/N Ratio: 7.35
Flight Position: [ source = BAT ]
RA: 198.58161324179 Dec: 11.2550650612691 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 198.577496058268 Dec: 11.2632389990809 [deg; J2000]
{ 13h 14m 18.6s , +11d 15' 47.7" }
+/- 1.27425571534339 [arcmin] (estimated 90% radius based on SNR)
+/- 0.421685456130134 [arcmin] (formal 1-sigma fit error)
SNR: 21.5155187986769
Angular difference between Flight and Ground position is 0.547015 arcmin
Partial Coding Fraction: 0.4296875 [ including projection effects ]
Duration
T90: 53.4959999322891 +/- 12.7582025458703
Measured from: -8.78400003910065
to: 44.7119998931885 [s; relative to TRIGTIME]
T50: 19.0759999752045 +/- 3.43351141244812
Measured from: 0.163999915122986
to: 19.2399998903275 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.44799995422363
to: 4.44799995422363 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12.3280000686646
to: 50.6999999284744 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.563928 1.138833 1.285662 0.596776
0.075099 0.078858 0.071361 0.062020 [error]
Peak 0.030660 0.052478 0.058428 0.014664
0.010149 0.011209 0.009994 0.008463 [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 1.69e-07 4.68e-07 1.05e-06 6.26e-06 2.83e-06 7.95e-06 erg/cm2
Error 2.62e-08 4.26e-08 6.73e-08 1.00e-06 1.83e-07 1.01e-06 erg/cm2
Peak flux Power-law 3.07e-01 3.91e-01 3.64e-01 5.95e-01 1.26e+00 1.66e+00 ph/cm2/s
Error 1.24e-01 9.68e-02 7.95e-02 2.83e-01 2.61e-01 3.49e-01 ph/cm2/s
Fluence Cutoff-PL 1.70e-07 4.69e-07 1.05e-06 6.18e-06 2.83e-06 7.87e-06 erg/cm2
Error 2.88e-08 4.24e-08 6.87e-08 1.21e-06 1.82e-07 1.20e-06 erg/cm2
Peak flux Cutoff-PL 2.80e-01 4.01e-01 3.79e-01 3.97e-01 1.24e+00 1.46e+00 ph/cm2/s
Error 1.47e-01 1.08e-01 9.54e-02 4.49e-01 2.71e-01 4.73e-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 0.834 0.121 - - 3.90e-03 2.69e-04 57.990 57
CPL 0.833 0.123 9999.4 0.0 3.93e-03 7.28e-04 58.040 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.104 0.352 - - 1.09e-02 2.18e-03 65.860 57
CPL 0.717 0.539 183.0 0.0 1.64e-02 0.00e+00 65.620 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: 35.712000 sec.
T50 in the 50-300 keV band: 16.832000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 63.028 -12.328 50.700
T90 53.496 -8.784 44.712
T50 19.076 0.164 19.240
Peak 1.000 3.448 4.448
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
198.5775 +11.2632 0.0089 30.6 58.5 3.2293 21.5 TRIG_00960102
------------------------------------------
Foreground time interval of the image:
-12.328 37.085 (delta_t = 49.413 [sec])
Background time interval of the image:
-239.616 -12.328 (delta_t = 227.288 [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 -12.328 sec. to 50.700 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.834384 ( -0.123517 0.119237 )
Norm@50keV : 3.89826E-03 ( -0.000270568 0.00026688 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.99 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 57 degrees of freedom
# Null hypothesis probability = 4.384732e-01
Photon flux (15-150 keV) in 63.03 sec: 0.447607 ( -0.0302984 0.0304711 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.83065e-06 ( -1.82672e-07 1.83207e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -12.328 sec. to 50.700 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.832720 ( -0.129317 0.115871 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.92663E-03 ( -0.00027502 0.00118179 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.04 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 56 degrees of freedom
# Null hypothesis probability = 3.999573e-01
Photon flux (15-150 keV) in 63.03 sec: 0.447851 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.8297e-06 ( -1.81091e-07 1.82844e-07 ) ergs/cm2
Band function
Time interval is from -12.328 sec. to 50.700 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.810355 ( 0.810355 0.810355 )
beta : -0.834397 ( -0.119188 0.123525 )
Epeak [keV] : 15.1705 ( -15.1705 -15.1705 )
Norm@50keV : 5.73007E-03 ( -0.00209536 123498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.99 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 55 degrees of freedom
# Null hypothesis probability = 3.655502e-01
Photon flux (15-150 keV) in 63.03 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] : 27.7321 (-2.69968 3.20948)
R^2/D10^2 : 8.07795E-03 (-0.00222361 0.00292008)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 105.34 using 59 PHA bins.
# Reduced chi-squared = 1.8481 for 57 degrees of freedom
# Null hypothesis probability = 1.034163e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.421e-08 9.357e-09
25- 50 3.829e-07 4.554e-08
50-150 2.136e-06 2.127e-07
15-150 2.583e-06 2.099e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 1.88731 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 165.46 using 59 PHA bins.
# Reduced chi-squared = 2.9028 for 57 degrees of freedom
# Null hypothesis probability = 1.659998e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.962e-07 2.307e-08
25- 50 5.698e-07 6.155e-08
50-150 1.250e-06 3.837e-07
15-150 2.116e-06 3.586e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.0080 (-2.1538 2.64819)
R1^2/D10^2 : 0.107500 (-0.052707 0.118305)
kT2 [keV] : 53.5648 (-13.9793 43.6029)
R2^2/D10^2 : 1.14598E-03 (-0.000832323 0.000885043)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.35 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 55 degrees of freedom
# Null hypothesis probability = 4.615806e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.597e-07 5.244e-08
25- 50 5.014e-07 1.351e-07
50-150 2.230e-06 1.011e-06
15-150 2.892e-06 1.151e-06
Peak spectrum fit
Power-law model
Time interval is from 3.448 sec. to 4.448 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.10374 ( -0.362806 0.342194 )
Norm@50keV : 1.08764E-02 ( -0.00218047 0.00217156 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.86 using 59 PHA bins.
# Reduced chi-squared = 1.155 for 57 degrees of freedom
# Null hypothesis probability = 1.972002e-01
Photon flux (15-150 keV) in 1 sec: 1.26208 ( -0.260692 0.262182 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13586e-07 ( -2.42388e-08 2.44986e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.448 sec. to 4.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.717209 ( -1.7949 -0.717224 )
Epeak [keV] : 183.041 ( -183.048 -183.048 )
Norm@50keV : 1.64416E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.62 using 59 PHA bins.
# Reduced chi-squared = 1.172 for 56 degrees of freedom
# Null hypothesis probability = 1.778299e-01
Photon flux (15-150 keV) in 1 sec: 1.24201 ( -0.271914 0.27087 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11093e-07 ( -2.68368e-08 2.5965e-08 ) ergs/cm2
Band function
Time interval is from 3.448 sec. to 4.448 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.280795 ( 0.248014 4.47609 )
beta : -1.30658 ( 1.31215 0.539358 )
Epeak [keV] : 93.5001 ( -88.4467 342.855 )
Norm@50keV : 2.96397E-02 ( -0.0338863 137.617 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.44 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 55 degrees of freedom
# Null hypothesis probability = 1.582848e-01
Photon flux (15-150 keV) in 1 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] : 19.7068 (-4.62755 7.1529)
R^2/D10^2 : 6.21162E-02 (-0.0391753 0.0895826)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.21 using 59 PHA bins.
# Reduced chi-squared = 1.214 for 57 degrees of freedom
# Null hypothesis probability = 1.287649e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.677e-09 2.143e-09
25- 50 2.307e-08 1.017e-08
50-150 6.627e-08 2.799e-08
15-150 9.402e-08 3.763e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-65.0941 -200)
Norm : 5.25501 (-1.07658 1.07658)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.26 using 59 PHA bins.
# Reduced chi-squared = 1.233 for 57 degrees of freedom
# Null hypothesis probability = 1.115441e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.308e-08 7.655e-09
25- 50 2.517e-08 1.443e-08
50-150 5.521e-08 3.205e-08
15-150 9.346e-08 5.430e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.7743 (-8.64771 -10.8558)
R1^2/D10^2 : 0.276813 (-0.204421 135.735)
kT2 [keV] : 41.4581 (-25.7468 -45.1567)
R2^2/D10^2 : 4.52240E-03 (-0.00314466 0.0546975)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.56 using 59 PHA bins.
# Reduced chi-squared = 1.192 for 55 degrees of freedom
# Null hypothesis probability = 1.558353e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.662e-09 4.789e-09
25- 50 2.513e-08 1.439e-08
50-150 7.910e-08 4.078e-08
15-150 1.119e-07 5.790e-08
Plot creation:
Sun Mar 8 23:50:51 EDT 2020