batgrbproduct analysis for trigger=755343
batgrbproduct Analysis for Trigger=755343
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): Thu Jun 1 11:12:08 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger755343/GCN5_download_cron
======================================================================
Trigger: 00755343 Segment: 000
BAT Trigger Time: 517954072 [s; MET]
Trigger Stop: 517954136 [s; MET]
UTC: 2017-05-31T20:07:32.854060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 121.26141607388 Dec: -14.0329183842728 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.14
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.14
Flight Position: [ source = BAT ]
RA: 121.26141607388 Dec: -14.0329183842728 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 121.218413951026 Dec: -14.0165832336715 [deg; J2000]
{ 08h 04m 52.4s , -14d 00' 59.7" }
+/- 2.38682033805634 [arcmin] (estimated 90% radius based on SNR)
+/- 1.14211245729736 [arcmin] (formal 1-sigma fit error)
SNR: 8.77760248423283
Angular difference between Flight and Ground position is 2.688254 arcmin
Partial Coding Fraction: 0.9296875 [ including projection effects ]
Duration
T90: 26.7439999580383 +/- 7.93523106378653
Measured from: -9.94799989461899
to: 16.7960000634193 [s; relative to TRIGTIME]
T50: 16.555999994278 +/- 5.74570581899996
Measured from: -2.68799990415573
to: 13.8680000901222 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -4.31599998474121
to: -3.31599998474121 [s; relative to TRIGTIME]
Total Fluence
Measured from: -13.244000017643
to: 25.783999979496 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.307597 0.345700 0.390286 0.145511
0.052693 0.052675 0.047972 0.048473 [error]
Peak 0.017940 0.014962 0.019806 0.030872
0.008434 0.008590 0.007882 0.007951 [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 7.31e-08 1.59e-07 2.74e-07 1.09e-06 7.50e-07 1.59e-06 erg/cm2
Error 2.05e-08 2.50e-08 4.83e-08 4.67e-07 1.20e-07 4.93e-07 erg/cm2
Peak flux Power-law 2.20e-023.82e-04 6.38e-023.84e-03 1.50e-013.66e-02 9.69e-011.93e+00 4.06e-011.45e-01 1.19e+001.98e+00 ph/cm2/s
Error 6.47e-02 8.67e-02 8.88e-02 1.28e+00 2.41e-01 1.32e+00 ph/cm2/s
Fluence Cutoff-PL 7.43e-08 1.59e-07 2.75e-07 9.97e-07 7.52e-07 1.50e-06 erg/cm2
Error 2.11e-08 2.45e-08 3.79e-08 4.32e-07 1.20e-07 5.79e-07 erg/cm2
Peak flux Cutoff-PL 3.62e-02 8.51e-02 1.59e-01 7.20e-01 4.32e-01 9.96e-01 ph/cm2/s
Error 6.47e-02 -------- -------- -------- -------- -------- 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 1.220 0.278 - - 1.90e-03 2.59e-04 57.860 57
CPL 2.151 0.972 54.6 0.0 5.91e-04 0.00e+00 56.630 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -2.122 1.366 - - 2.69e-04 1.94e-03 65.220 57
CPL -3.295 0.000 9688.4 0.0 4.85e-05 0.00e+00 65.370 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: 16.128000 sec.
T50 in the 50-300 keV band: 9.664000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 39.028 -13.244 25.784
T90 26.744 -9.948 16.796
T50 16.556 -2.688 13.868
Peak 1.000 -4.316 -3.316
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
121.2184 -14.0166 0.0219 16.0 -132.2 0.9832 8.8 TRIG_00755343
------------------------------------------
Foreground time interval of the image:
-13.244 25.784 (delta_t = 39.028 [sec])
Background time interval of the image:
-119.000 -13.244 (delta_t = 105.756 [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 -13.244 sec. to 25.784 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22015 ( -0.280242 0.276152 )
Norm@50keV : 1.90476E-03 ( -0.000259287 0.000258582 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.86 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.432805e-01
Photon flux (15-150 keV) in 39.03 sec: 0.224234 ( -0.0311311 0.0312837 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.50024e-07 ( -1.18697e-07 1.20791e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -13.244 sec. to 25.784 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.15146 ( -1.24096 0.702815 )
Epeak [keV] : 54.6147 ( )
Norm@50keV : 5.90716E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.63 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 56 degrees of freedom
# Null hypothesis probability = 4.514991e-01
Photon flux (15-150 keV) in 39.03 sec: 0.224795 ( -0.031922 0.030749 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.52288e-07 ( -1.20751e-07 1.18819e-07 ) ergs/cm2
Band function
Time interval is from -13.244 sec. to 25.784 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.986859 ( 0.987224 0.987224 )
beta : -1.22011 ( -0.274712 0.280066 )
Epeak [keV] : 49.3596 ( -49.0599 -49.0599 )
Norm@50keV : 3.39799E-03 ( -0.00149923 0.290542 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.86 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.701146e-01
Photon flux (15-150 keV) in 39.03 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] : 21.1016 (-4.28471 5.79888)
R^2/D10^2 : 8.25548E-03 (-0.00431333 0.00877539)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.65 using 59 PHA bins.
# Reduced chi-squared = 1.345 for 57 degrees of freedom
# Null hypothesis probability = 4.235335e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.705e-08 8.801e-09
25- 50 1.395e-07 3.517e-08
50-150 4.630e-07 1.384e-07
15-150 6.295e-07 1.471e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-50.9186 -200)
Norm : 0.917878 (-0.126865 0.126865)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.50 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 57 degrees of freedom
# Null hypothesis probability = 2.581894e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.921e-08 5.062e-08
25- 50 1.716e-07 9.584e-08
50-150 3.764e-07 2.112e-07
15-150 6.372e-07 3.532e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.31974 (-1.80472 2.33796)
R1^2/D10^2 : 0.640760 (-0.485629 3.44296)
kT2 [keV] : 32.8451 (-9.00194 21.5208)
R2^2/D10^2 : 1.93844E-03 (-0.00142264 0.00317761)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.07 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 55 degrees of freedom
# Null hypothesis probability = 4.718417e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.950e-08 4.924e-08
25- 50 1.358e-07 5.920e-08
50-150 5.668e-07 3.189e-07
15-150 7.921e-07 3.800e-07
Peak spectrum fit
Power-law model
Time interval is from -4.316 sec. to -3.316 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.12157 ( -0.699426 2.03211 )
Norm@50keV : 2.69331E-04 ( -0.000278112 0.00359651 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.22 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 57 degrees of freedom
# Null hypothesis probability = 2.125969e-01
Photon flux (15-150 keV) in 1 sec: 0.406341 0.144667 ( -0.144421 0.338276 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.47725e-15 ( -2.14381e-08 2.07931e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.316 sec. to -3.316 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.29487 ( )
Epeak [keV] : 9688.39 ( )
Norm@50keV : 4.85335E-05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.37 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 56 degrees of freedom
# Null hypothesis probability = 1.833770e-01
Photon flux (15-150 keV) in 1 sec: 0.431772 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.68422e-08 ( -2.13426e-08 2.06748e-08 ) ergs/cm2
Band function
Time interval is from -4.316 sec. to -3.316 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.17498 ( 1.16587 1.16587 )
beta : 0.177841 ( -1.35473 -0.215047 )
Epeak [keV] : 9.72736 ( -9.50609 -9.50609 )
Norm@50keV : 4.31524E-03 ( -0.00426433 201095 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.55 using 59 PHA bins.
# Reduced chi-squared = 1.228 for 55 degrees of freedom
# Null hypothesis probability = 1.193457e-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] : 200.000 (-200 -200)
R^2/D10^2 : 2.04085E-04 (-7.48593e-05 -0.00020421)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.98 using 59 PHA bins.
# Reduced chi-squared = 1.193 for 57 degrees of freedom
# Null hypothesis probability = 1.514377e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.438e-10 2.416e-10
25- 50 2.769e-09 2.286e-09
50-150 5.387e-08 5.435e-08
15-150 5.698e-08 5.740e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-123.658 -199.363)
Norm : 1.84907 (-0.788474 0.788474)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.23 using 59 PHA bins.
# Reduced chi-squared = 1.285 for 57 degrees of freedom
# Null hypothesis probability = 7.252864e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.604e-09 3.116e-09
25- 50 8.857e-09 5.775e-09
50-150 1.943e-08 1.286e-08
15-150 3.289e-08 2.194e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.15015 (-4.14212 5.79534)
R1^2/D10^2 : 0.785864 (-0.771037 1.5152)
kT2 [keV] : 199.363 (-147.361 -199.363)
R2^2/D10^2 : 1.90007E-04 (-7.57717e-05 0.00122281)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.73 using 59 PHA bins.
# Reduced chi-squared = 1.159 for 55 degrees of freedom
# Null hypothesis probability = 1.962476e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.332e-09 2.899e-09
25- 50 6.367e-09 3.898e-09
50-150 5.074e-08 2.192e-08
15-150 6.144e-08 2.290e-08
Plot creation:
Thu Jun 1 11:35:19 EDT 2017