batgrbproduct analysis for trigger=932742
batgrbproduct Analysis for Trigger=932742
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): Mon Nov 4 09:38:15 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger932742/batgroup_hand_proc
======================================================================
Trigger: 00932742 Segment: 000
BAT Trigger Time: 594335307.2 [s; MET]
Trigger Stop: 594335309.248 [s; MET]
UTC: 2019-11-01T21:08:03.350920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 251.844271456864 Dec: 43.7542036411452 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.15
Image Trigger?: NO
Rate S/N Ratio: 8.24621125123532 [ if not an image trigger ]
Image S/N Ratio: 7.15
Flight Position: [ source = BAT ]
RA: 251.844271456864 Dec: 43.7542036411452 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 251.845092073187 Dec: 43.7401477189448 [deg; J2000]
{ 16h 47m 22.8s , +43d 44' 24.5" }
+/- 1.71055761051825 [arcmin] (estimated 90% radius based on SNR)
+/- 0.67928290272828 [arcmin] (formal 1-sigma fit error)
SNR: 14.1274739425533
Angular difference between Flight and Ground position is 0.844105 arcmin
Partial Coding Fraction: 0.4726562 [ including projection effects ]
Duration
T90: 137.952000021935 +/- 22.8284020094228
Measured from: -16.6640000343323
to: 121.287999987602 [s; relative to TRIGTIME]
T50: 60.432000041008 +/- 21.6397396780648
Measured from: 0.0399999618530273
to: 60.472000002861 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.996000051498413
to: 0.00399994850158691 [s; relative to TRIGTIME]
Total Fluence
Measured from: -20.9680000543594
to: 143.527999997139 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.977936 1.227119 0.828758 0.121164
0.104315 0.107900 0.095239 0.085797 [error]
Peak 0.041501 0.075012 0.020108 0.005123
0.010221 0.010847 0.010086 0.008914 [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 3.43e-07 5.34e-07 6.23e-07 1.40e-06 1.91e-06 2.90e-06 erg/cm2
Error 5.38e-08 5.32e-08 9.29e-08 4.33e-07 2.17e-07 5.18e-07 erg/cm2
Peak flux Power-law 5.80e-01 4.39e-01 2.22e-01 1.61e-01 1.32e+00 1.40e+00 ph/cm2/s
Error 1.61e-01 9.10e-02 7.57e-02 1.03e-01 2.71e-01 2.94e-01 ph/cm2/s
Fluence Cutoff-PL 3.28e-07 5.55e-07 6.31e-07 8.28e-07 1.86e-06 2.34e-06 erg/cm2
Error 6.26e-08 6.88e-08 9.85e-08 8.93e-07 2.42e-07 8.11e-07 erg/cm2
Peak flux Cutoff-PL 4.78e-01 5.42e-01 2.11e-01 2.08e-02 1.25e+00 1.25e+00 ph/cm2/s
Error 1.93e-01 1.34e-01 9.66e-02 7.03e-02 2.76e-01 2.80e-01 ph/cm2/s
Fluence Band 3.23e-07 5.58e-07 6.16e-07 1.15e-06 1.87e-06 2.65e-06 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 1.776 0.181 - - 1.26e-03 1.39e-04 45.590 57
CPL 1.441 0.708 78.5 -24.1 1.90e-03 2.16e-03 44.950 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.983 0.371 - - 8.84e-03 2.33e-03 44.060 57
CPL -0.003 2.355 41.6 16.8 1.24e-01 2.73e+00 40.720 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: 33.664000 sec.
T50 in the 50-300 keV band: 14.656000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 164.496 -20.968 143.528
T90 137.952 -16.664 121.288
T50 60.432 0.040 60.472
Peak 1.000 -0.996 0.004
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
251.8451 +43.7401 0.0136 40.8 172.7 2.7426 14.1 TRIG_00932742
------------------------------------------
Foreground time interval of the image:
-20.968 25.101 (delta_t = 46.069 [sec])
Background time interval of the image:
-60.200 -20.968 (delta_t = 39.232 [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 -20.968 sec. to 143.528 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.77564 ( -0.177609 0.183847 )
Norm@50keV : 1.26151E-03 ( -0.000139807 0.000137555 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.59 using 59 PHA bins.
# Reduced chi-squared = 0.7999 for 57 degrees of freedom
# Null hypothesis probability = 8.611671e-01
Photon flux (15-150 keV) in 164.5 sec: 0.172219 ( -0.0173683 0.0173917 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.91231e-06 ( -2.16008e-07 2.18507e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -20.968 sec. to 143.528 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44055 ( -0.809429 0.607259 )
Epeak [keV] : 78.4720 ( -30.2149 -78.472 )
Norm@50keV : 1.90213E-03 ( -0.00115534 0.00315814 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.95 using 59 PHA bins.
# Reduced chi-squared = 0.8027 for 56 degrees of freedom
# Null hypothesis probability = 8.549561e-01
Photon flux (15-150 keV) in 164.5 sec: 0.169695 ( -0.018181 0.018114 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.86216e-06 ( -2.41489e-07 2.4244e-07 ) ergs/cm2
Band function
Time interval is from -20.968 sec. to 143.528 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.39178 ( 1.28308 6.26885 )
beta : -2.19446 ( 1.97151 0.35088 )
Epeak [keV] : 74.3662 ( -60.5141 -60.5141 )
Norm@50keV : 2.01594E-03 ( -0.000773185 0.0468607 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.90 using 59 PHA bins.
# Reduced chi-squared = 0.8164 for 55 degrees of freedom
# Null hypothesis probability = 8.326231e-01
Photon flux (15-150 keV) in 164.5 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.86902e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.3147 (-1.4947 1.70486)
R^2/D10^2 : 3.74463E-02 (-0.0142342 0.0229535)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.88 using 59 PHA bins.
# Reduced chi-squared = 1.191 for 57 degrees of freedom
# Null hypothesis probability = 1.532899e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.979e-07 3.347e-08
25- 50 6.419e-07 8.126e-08
50-150 5.953e-07 1.267e-07
15-150 1.435e-06 1.846e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 104.099 (-31.3532 73.8065)
Norm : 0.761711 (-0.102321 0.110915)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.14 using 59 PHA bins.
# Reduced chi-squared = 0.7919 for 57 degrees of freedom
# Null hypothesis probability = 8.718171e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.275e-07 5.067e-08
25- 50 5.708e-07 6.629e-08
50-150 9.459e-07 3.719e-07
15-150 1.844e-06 4.385e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.34317 (-2.16611 2.36805)
R1^2/D10^2 : 0.280858 (-0.179154 1.06651)
kT2 [keV] : 21.8239 (-5.82521 15.4161)
R2^2/D10^2 : 3.37381E-03 (-0.00286241 0.00851008)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.09 using 59 PHA bins.
# Reduced chi-squared = 0.8381 for 55 degrees of freedom
# Null hypothesis probability = 7.982749e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.155e-07 1.684e-07
25- 50 5.575e-07 2.142e-07
50-150 9.535e-07 5.111e-07
15-150 1.827e-06 8.187e-07
Peak spectrum fit
Power-law model
Time interval is from -0.996 sec. to 0.004 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98327 ( -0.3483 0.393004 )
Norm@50keV : 8.83783E-03 ( -0.00236668 0.00228481 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.06 using 59 PHA bins.
# Reduced chi-squared = 0.7730 for 57 degrees of freedom
# Null hypothesis probability = 8.951084e-01
Photon flux (15-150 keV) in 1 sec: 1.31558 ( -0.270991 0.270993 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.1441e-08 ( -2.00794e-08 2.09815e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.996 sec. to 0.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.53109E-03 ( -2.84486 1.8648 )
Epeak [keV] : 41.5541 ( -6.09758 27.5133 )
Norm@50keV : 0.124497 ( -0.125456 5.32589 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.72 using 59 PHA bins.
# Reduced chi-squared = 0.7272 for 56 degrees of freedom
# Null hypothesis probability = 9.377422e-01
Photon flux (15-150 keV) in 1 sec: 1.25019 ( -0.275116 0.27642 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.1278e-08 ( -1.79383e-08 2.15358e-08 ) ergs/cm2
Band function
Time interval is from -0.996 sec. to 0.004 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.75835E-02 ( 0.869487 2.53264 )
beta : -10.00000 ( 10 1.39758e-05 )
Epeak [keV] : 41.4634 ( -10.282 27.5268 )
Norm@50keV : 0.115672 ( -0.0232268 5.35845 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.73 using 59 PHA bins.
# Reduced chi-squared = 0.7405 for 55 degrees of freedom
# Null hypothesis probability = 9.244207e-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] : 10.5600 (-2.03535 2.42053)
R^2/D10^2 : 0.534150 (-0.290554 0.652683)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.64 using 59 PHA bins.
# Reduced chi-squared = 0.7306 for 57 degrees of freedom
# Null hypothesis probability = 9.367919e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.233e-08 4.473e-09
25- 50 3.305e-08 1.211e-08
50-150 2.015e-08 1.004e-08
15-150 6.553e-08 2.060e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.9660 (-27.1226 68.0573)
Norm : 6.83505 (-1.88184 2.60437)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.96 using 59 PHA bins.
# Reduced chi-squared = 0.7362 for 57 degrees of freedom
# Null hypothesis probability = 9.321310e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.734e-08 5.611e-09
25- 50 2.691e-08 9.715e-09
50-150 3.225e-08 2.248e-08
15-150 7.650e-08 3.177e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.84629 (-2.73186 84.7667)
R1^2/D10^2 : 39.1471 (-42.8783 -42.8783)
kT2 [keV] : 11.7363 (-2.56966 -11.6813)
R2^2/D10^2 : 0.331311 (-0.334493 0.569795)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.86 using 59 PHA bins.
# Reduced chi-squared = 0.7247 for 55 degrees of freedom
# Null hypothesis probability = 9.379163e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.487e-08 6.965e-09
25- 50 3.015e-08 1.724e-08
50-150 2.408e-08 1.559e-08
15-150 6.911e-08 3.865e-08
Plot creation:
Mon Nov 4 09:46:26 EST 2019