batgrbproduct analysis for trigger=844192
batgrbproduct Analysis for Trigger=844192
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 Jun 25 18:51:30 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger844192/GCN5_download_cron
======================================================================
Trigger: 00844192 Segment: 000
BAT Trigger Time: 551541001.536 [s; MET]
Trigger Stop: 551541009.728 [s; MET]
UTC: 2018-06-24T13:49:40.378860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 318.071401165986 Dec: -2.33235276584909 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.04
Image Trigger?: NO
Rate S/N Ratio: 11.0453610171873 [ if not an image trigger ]
Image S/N Ratio: 11.04
Flight Position: [ source = BAT ]
RA: 318.071401165986 Dec: -2.33235276584909 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 318.095543018449 Dec: -2.35581950029963 [deg; J2000]
{ 21h 12m 22.9s , -02d 21' 21.0" }
+/- 1.31361664008162 [arcmin] (estimated 90% radius based on SNR)
+/- 0.431495441223523 [arcmin] (formal 1-sigma fit error)
SNR: 20.6004858949416
Angular difference between Flight and Ground position is 2.019195 arcmin
Partial Coding Fraction: 0.4765625 [ including projection effects ]
Duration
T90: 486.395999908447 +/- 38.5043168772254
Measured from: -42.4559998512268
to: 443.94000005722 [s; relative to TRIGTIME]
T50: 328.015999913216 +/- 6.77248104226581
Measured from: 8.5200001001358
to: 336.536000013351 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.01999998092651
to: 7.01999998092651 [s; relative to TRIGTIME]
Total Fluence
Measured from: -60.6080000400543
to: 541.799999952316 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.524363 3.969407 2.160056 0.612323
0.154588 0.160025 0.139691 0.122589 [error]
Peak 0.053290 0.064315 0.036092 0.010775
0.008791 0.009334 0.007843 0.006354 [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 1.18e-06 1.70e-06 1.81e-06 3.57e-06 5.80e-06 8.25e-06 erg/cm2
Error 9.81e-08 8.45e-08 1.44e-07 6.00e-07 3.25e-07 7.22e-07 erg/cm2
Peak flux Power-law 5.60e-01 4.57e-01 2.53e-01 2.06e-01 1.36e+00 1.48e+00 ph/cm2/s
Error 1.37e-01 7.52e-02 6.60e-02 1.04e-01 2.24e-01 2.47e-01 ph/cm2/s
Fluence Cutoff-PL 1.19e-06 1.70e-06 1.80e-06 3.50e-06 5.79e-06 8.19e-06 erg/cm2
Error 7.64e-08 8.40e-08 1.44e-07 9.37e-07 3.40e-07 1.17e-06 erg/cm2
Peak flux Cutoff-PL 5.55e-01 4.62e-01 2.54e-01 1.84e-01 1.36e+00 1.45e+00 ph/cm2/s
Error 1.47e-01 8.92e-02 6.83e-02 1.60e-01 2.28e-01 2.78e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 5.63e-01 4.58e-01 2.52e-01 2.02e-01 1.36e+00 1.47e+00 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 1.909 0.100 - - 1.05e-03 5.93e-05 47.110 57
CPL 1.908 0.214 9999.4 0.0 1.05e-03 0.00e+00 47.110 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.854 0.306 - - 9.67e-03 1.92e-03 40.530 57
CPL 1.776 0.981 128.4 0.0 1.07e-02 0.00e+00 40.520 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: 462.528000 sec.
T50 in the 50-300 keV band: 308.800000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 602.408 -60.608 541.800
T90 486.396 -42.456 443.940
T50 328.016 8.520 336.536
Peak 1.000 6.020 7.020
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
318.0955 -2.3558 0.0094 28.6 124.2 4.4150 20.6 TRIG_00844192
------------------------------------------
Foreground time interval of the image:
-60.608 47.665 (delta_t = 108.273 [sec])
Background time interval of the image:
-239.536 -60.608 (delta_t = 178.928 [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 -60.608 sec. to 541.800 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90938 ( -0.0988889 0.10065 )
Norm@50keV : 1.04638E-03 ( -5.96079e-05 5.89923e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.11 using 59 PHA bins.
# Reduced chi-squared = 0.8265 for 57 degrees of freedom
# Null hypothesis probability = 8.219542e-01
Photon flux (15-150 keV) in 602.4 sec: 0.150768 ( -0.00776677 0.00779127 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.79574e-06 ( -3.2357e-07 3.2601e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -60.608 sec. to 541.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90848 ( -0.325731 0.101685 )
Epeak [keV] : 9999.36 ( )
Norm@50keV : 1.04696E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.11 using 59 PHA bins.
# Reduced chi-squared = 0.8412 for 56 degrees of freedom
# Null hypothesis probability = 7.954013e-01
Photon flux (15-150 keV) in 602.4 sec: 0.150818 ( -0.00781 0.007674 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.79153e-06 ( -3.54169e-07 3.26441e-07 ) ergs/cm2
Band function
Time interval is from -60.608 sec. to 541.800 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.34289 ( 1.34116 1.34116 )
beta : -1.95222 ( 1.9522 0.132627 )
Epeak [keV] : 34.9984 ( -34.901 -34.901 )
Norm@50keV : 2.51581E-03 ( -0.00154606 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.63 using 59 PHA bins.
# Reduced chi-squared = 0.8478 for 55 degrees of freedom
# Null hypothesis probability = 7.817225e-01
Photon flux (15-150 keV) in 602.4 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] : 10.9752 ( )
R^2/D10^2 : 4.68950E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 152.00 using 59 PHA bins.
# Reduced chi-squared = 2.6667 for 57 degrees of freedom
# Null hypothesis probability = 1.404810e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.107e-07 6.566e-08
25- 50 2.004e-06 1.205e-07
50-150 1.361e-06 1.738e-07
15-150 4.075e-06 2.467e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 85.7549 (-14.8287 20.2516)
Norm : 0.677771 (-0.0545619 0.0621324)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.53 using 59 PHA bins.
# Reduced chi-squared = 0.9567 for 57 degrees of freedom
# Null hypothesis probability = 5.682802e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.063e-06 8.644e-08
25- 50 1.779e-06 9.488e-08
50-150 2.629e-06 6.684e-07
15-150 5.471e-06 5.596e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.75343 (-0.959051 0.996473)
R1^2/D10^2 : 0.231450 (-0.0875873 0.170603)
kT2 [keV] : 27.3946 (-6.07263 11.2637)
R2^2/D10^2 : 1.14068E-03 (-0.000751439 0.00169058)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.62 using 59 PHA bins.
# Reduced chi-squared = 0.9385 for 55 degrees of freedom
# Null hypothesis probability = 6.047260e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.068e-06 1.645e-07
25- 50 1.759e-06 2.157e-07
50-150 2.940e-06 8.765e-07
15-150 5.768e-06 1.079e-06
Peak spectrum fit
Power-law model
Time interval is from 6.020 sec. to 7.020 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85401 ( -0.293479 0.319071 )
Norm@50keV : 9.66953E-03 ( -0.00195537 0.00187694 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.53 using 59 PHA bins.
# Reduced chi-squared = 0.7111 for 57 degrees of freedom
# Null hypothesis probability = 9.513782e-01
Photon flux (15-150 keV) in 1 sec: 1.36137 ( -0.224463 0.224528 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.89052e-08 ( -1.75025e-08 1.79082e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.020 sec. to 7.020 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.77603 ( -1.24759 0.714227 )
Epeak [keV] : 128.401 ( )
Norm@50keV : 1.06843E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.52 using 59 PHA bins.
# Reduced chi-squared = 0.7235 for 56 degrees of freedom
# Null hypothesis probability = 9.406765e-01
Photon flux (15-150 keV) in 1 sec: 1.35805 ( -0.22839 0.22672 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.83824e-08 ( -1.91918e-08 1.83126e-08 ) ergs/cm2
Band function
Time interval is from 6.020 sec. to 7.020 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.46241 ( 1.46058 1.46058 )
beta : -1.87169 ( 1.88233 0.321931 )
Epeak [keV] : 36.4315 ( -38.3074 -38.3074 )
Norm@50keV : 1.85834E-02 ( -0.00776981 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.53 using 59 PHA bins.
# Reduced chi-squared = 0.7369 for 55 degrees of freedom
# Null hypothesis probability = 9.276094e-01
Photon flux (15-150 keV) in 1 sec: 1.36318 ( ) 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] : 10.7488 (-2.13512 2.75077)
R^2/D10^2 : 0.483955 (-0.276295 0.620305)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.59 using 59 PHA bins.
# Reduced chi-squared = 0.9051 for 57 degrees of freedom
# Null hypothesis probability = 6.773779e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.162e-08 3.959e-09
25- 50 3.190e-08 8.895e-09
50-150 2.044e-08 7.880e-09
15-150 6.397e-08 1.704e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 92.8395 (-40.9046 -92.8403)
Norm : 6.12480 (-1.30659 1.82076)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.01 using 59 PHA bins.
# Reduced chi-squared = 0.7195 for 57 degrees of freedom
# Null hypothesis probability = 9.454342e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.599e-08 3.510e-09
25- 50 2.723e-08 6.345e-09
50-150 4.226e-08 2.676e-08
15-150 8.549e-08 3.292e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.60627 (-2.64748 3.35464)
R1^2/D10^2 : 3.94345 (-3.06854 54.8192)
kT2 [keV] : 21.9478 (-8.79743 39.6534)
R2^2/D10^2 : 2.59848E-02 (-0.0241476 0.0461574)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.22 using 59 PHA bins.
# Reduced chi-squared = 0.7495 for 55 degrees of freedom
# Null hypothesis probability = 9.158384e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.716e-08 9.965e-09
25- 50 2.496e-08 1.332e-08
50-150 4.494e-08 2.755e-08
15-150 8.707e-08 4.573e-08
Plot creation:
Mon Jun 25 18:54:48 EDT 2018