batgrbproduct analysis for trigger=933515
batgrbproduct Analysis for Trigger=933515
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 Nov 7 16:38:37 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger933515/GCN5_download_cron
======================================================================
Trigger: 00933515 Segment: 000
BAT Trigger Time: 594742547.776 [s; MET]
Trigger Stop: 594742548.288 [s; MET]
UTC: 2019-11-06T14:15:23.900640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 269.349636887849 Dec: 46.0518248196464 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.85
Image Trigger?: NO
Rate S/N Ratio: 20.5669638012031 [ if not an image trigger ]
Image S/N Ratio: 7.85
Flight Position: [ source = BAT ]
RA: 269.349636887849 Dec: 46.0518248196464 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 269.357953427051 Dec: 46.0475077075288 [deg; J2000]
{ 17h 57m 25.9s , +46d 02' 51.0" }
+/- 1.63589864800652 [arcmin] (estimated 90% radius based on SNR)
+/- 0.764682942120642 [arcmin] (formal 1-sigma fit error)
SNR: 15.0574733635569
Angular difference between Flight and Ground position is 0.432471 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 3.41599988937378 +/- 0.347355618765658
Measured from: -1.23199987411499
to: 2.18400001525879 [s; relative to TRIGTIME]
T50: 1.63599991798401 +/- 0.610534272533938
Measured from: 0.00800013542175293
to: 1.64400005340576 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0240000486373901
to: 0.97599995136261 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.30799996852875
to: 2.37999999523163 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.056194 0.154821 0.155162 0.051023
0.013675 0.014528 0.013266 0.011265 [error]
Peak 0.019545 0.055613 0.051903 0.025220
0.007080 0.007875 0.007265 0.005945 [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 2.03e-08 5.42e-08 1.17e-07 6.54e-07 3.15e-07 8.46e-07 erg/cm2
Error 4.28e-09 6.77e-09 1.22e-08 1.62e-07 3.28e-08 1.67e-07 erg/cm2
Peak flux Power-law 2.00e-01 3.11e-01 3.64e-01 8.21e-01 1.12e+00 1.70e+00 ph/cm2/s
Error 6.97e-02 6.55e-02 5.49e-02 2.86e-01 1.71e-01 2.96e-01 ph/cm2/s
Fluence Cutoff-PL 1.87e-08 5.55e-08 1.21e-07 4.21e-07 3.09e-07 6.16e-07 erg/cm2
Error 5.27e-09 7.43e-09 1.47e-08 2.59e-07 3.54e-08 2.06e-07 erg/cm2
Peak flux Cutoff-PL 2.00e-01 3.11e-01 3.64e-01 8.14e-01 1.12e+00 1.69e+00 ph/cm2/s
Error 7.73e-02 6.66e-02 6.24e-02 -------- 1.72e-01 4.17e-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 0.893 0.175 - - 7.59e-03 7.57e-04 42.180 57
CPL 0.565 0.588 251.0 0.0 1.06e-02 7.74e-03 41.490 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.774 0.278 - - 9.70e-03 1.53e-03 42.650 57
CPL 0.768 0.280 9999.4 0.0 9.77e-03 9.47e-03 42.650 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: 3.328000 sec.
T50 in the 50-300 keV band: 1.792000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 3.688 -1.308 2.380
T90 3.416 -1.232 2.184
T50 1.636 0.008 1.644
Peak 1.000 -0.024 0.976
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
269.3580 +46.0475 0.0127 15.4 42.2 0.4137 15.1 TRIG_00933515
------------------------------------------
Foreground time interval of the image:
-1.308 2.380 (delta_t = 3.688 [sec])
Background time interval of the image:
-239.776 -1.308 (delta_t = 238.468 [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 -1.308 sec. to 2.380 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.893108 ( -0.17843 0.171295 )
Norm@50keV : 7.58657E-03 ( -0.000759627 0.000753978 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.18 using 59 PHA bins.
# Reduced chi-squared = 0.7401 for 57 degrees of freedom
# Null hypothesis probability = 9.287034e-01
Photon flux (15-150 keV) in 3.688 sec: 0.870724 ( -0.0868938 0.0871528 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.1485e-07 ( -3.27058e-08 3.2889e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.308 sec. to 2.380 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.564954 ( -0.767709 0.408714 )
Epeak [keV] : 251.010 ( -251.024 -251.024 )
Norm@50keV : 1.06179E-02 ( -0.00361572 0.0118613 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.49 using 59 PHA bins.
# Reduced chi-squared = 0.7409 for 56 degrees of freedom
# Null hypothesis probability = 9.260499e-01
Photon flux (15-150 keV) in 3.688 sec: 0.858824 ( -0.09027 0.090311 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.09215e-07 ( -3.57164e-08 3.50611e-08 ) ergs/cm2
Band function
Time interval is from -1.308 sec. to 2.380 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99999 ( -1.35804e-05 -4.99999 )
beta : -1.09852 ( -0.278341 0.23071 )
Epeak [keV] : 37.6579 ( -11.4212 7.24128 )
Norm@50keV : 48.0795 ( -4.58335 310.816 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.65 using 59 PHA bins.
# Reduced chi-squared = 0.7027 for 55 degrees of freedom
# Null hypothesis probability = 9.537456e-01
Photon flux (15-150 keV) in 3.688 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] : 23.1555 (-3.07284 3.80477)
R^2/D10^2 : 2.69655E-02 (-0.0100032 0.0150618)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.91 using 59 PHA bins.
# Reduced chi-squared = 0.9634 for 57 degrees of freedom
# Null hypothesis probability = 5.538354e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.632e-09 1.934e-09
25- 50 5.245e-08 8.464e-09
50-150 2.100e-07 3.622e-08
15-150 2.721e-07 3.847e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-17.1234 -200)
Norm : 3.51722 (-0.36173 0.36173)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.42 using 59 PHA bins.
# Reduced chi-squared = 1.411 for 57 degrees of freedom
# Null hypothesis probability = 2.223379e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.231e-08 1.785e-08
25- 50 6.215e-08 3.391e-08
50-150 1.363e-07 7.417e-08
15-150 2.308e-07 1.261e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.0444 (-3.95024 4.58375)
R1^2/D10^2 : 0.132954 (-0.072499 0.132734)
kT2 [keV] : 60.6829 (-29.3099 -60.6829)
R2^2/D10^2 : 1.39674E-03 (-0.00132323 0.00771188)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.94 using 59 PHA bins.
# Reduced chi-squared = 0.7081 for 55 degrees of freedom
# Null hypothesis probability = 9.501885e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.682e-08 8.759e-09
25- 50 6.091e-08 2.992e-08
50-150 2.349e-07 1.201e-07
15-150 3.126e-07 1.531e-07
Peak spectrum fit
Power-law model
Time interval is from -0.024 sec. to 0.976 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.773767 ( -0.28876 0.266805 )
Norm@50keV : 9.69717E-03 ( -0.00154806 0.00151256 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.65 using 59 PHA bins.
# Reduced chi-squared = 0.7482 for 57 degrees of freedom
# Null hypothesis probability = 9.212506e-01
Photon flux (15-150 keV) in 1 sec: 1.11571 ( -0.170243 0.171339 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1459e-07 ( -1.79198e-08 1.80372e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.024 sec. to 0.976 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.767912 ( -0.292368 0.268277 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 9.77078E-03 ( -0.00145645 0.0174903 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.65 using 59 PHA bins.
# Reduced chi-squared = 0.7615 for 56 degrees of freedom
# Null hypothesis probability = 9.056571e-01
Photon flux (15-150 keV) in 1 sec: 1.11563 ( -0.172974 0.17007 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14606e-07 ( -1.87234e-08 1.8008e-08 ) ergs/cm2
Band function
Time interval is from -0.024 sec. to 0.976 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.863933 ( 0.863899 0.863899 )
beta : -0.773769 ( -0.266372 0.289011 )
Epeak [keV] : 14.8135 ( -14.8136 -14.8136 )
Norm@50keV : 1.41335E-02 ( -0.00591582 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.65 using 59 PHA bins.
# Reduced chi-squared = 0.7754 for 55 degrees of freedom
# Null hypothesis probability = 8.878142e-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] : 26.3236 (-5.72353 8.48378)
R^2/D10^2 : 2.39533E-02 (-0.0130986 0.0260914)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.71 using 59 PHA bins.
# Reduced chi-squared = 0.8897 for 57 degrees of freedom
# Null hypothesis probability = 7.085578e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.804e-09 9.725e-10
25- 50 1.632e-08 4.604e-09
50-150 8.308e-08 2.494e-08
15-150 1.022e-07 2.790e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-32.3343 -200)
Norm : 4.42348 (-0.710345 0.710345)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.03 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 57 degrees of freedom
# Null hypothesis probability = 2.174404e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.101e-08 6.330e-09
25- 50 2.118e-08 1.196e-08
50-150 4.645e-08 2.664e-08
15-150 7.864e-08 4.420e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 11.2628 (-4.30498 6.04392)
R1^2/D10^2 : 0.195421 (-0.118662 0.398827)
kT2 [keV] : 63.0339 (-79.4103 -87.1678)
R2^2/D10^2 : 1.82976E-03 (-0.000791511 0.0108692)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.62 using 59 PHA bins.
# Reduced chi-squared = 0.7385 for 55 degrees of freedom
# Null hypothesis probability = 9.261775e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.861e-09 3.514e-09
25- 50 2.015e-08 1.107e-08
50-150 8.552e-08 4.775e-08
15-150 1.115e-07 5.760e-08
Plot creation:
Thu Nov 7 16:42:41 EST 2019