batgrbproduct analysis for trigger=907950
batgrbproduct Analysis for Trigger=907950
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): Wed Jun 12 20:34:33 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger907950/GCN5_download_cron
======================================================================
Trigger: 00907950 Segment: 000
BAT Trigger Time: 581968165.056 [s; MET]
Trigger Stop: 581968168.128 [s; MET]
UTC: 2019-06-11T17:49:01.998020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 324.769471588208 Dec: -56.0820139162483 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.07
Image Trigger?: NO
Rate S/N Ratio: 9.8488578017961 [ if not an image trigger ]
Image S/N Ratio: 8.07
Flight Position: [ source = BAT ]
RA: 324.769471588208 Dec: -56.0820139162483 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 324.696060030405 Dec: -56.0706137552963 [deg; J2000]
{ 21h 38m 47.1s , -56d 04' 14.2" }
+/- 2.97664290058799 [arcmin] (estimated 90% radius based on SNR)
+/- 2.37649465272453 [arcmin] (formal 1-sigma fit error)
SNR: 6.40274047879776
Angular difference between Flight and Ground position is 2.551598 arcmin
Partial Coding Fraction: 0.65625 [ including projection effects ]
Duration
T90: 40.3639999628067 +/- 30.5642460239305
Measured from: -0.0279998779296875
to: 40.336000084877 [s; relative to TRIGTIME]
T50: 8.19599997997284 +/- 53.8370901378916
Measured from: 1.62800014019012
to: 9.82400012016296 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.544000029563904
to: 1.5440000295639 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.939999938011169
to: 63.8240000009537 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.122745 0.236078 0.124688 0.027448
0.073995 0.076206 0.067610 0.060689 [error]
Peak 0.005686 0.045861 0.038199 0.001728
0.009643 0.011089 0.009410 0.008185 [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 6.48e-08 9.09e-08 9.45e-08 1.80e-07 3.07e-07 4.30e-07 erg/cm2
Error 3.38e-08 3.55e-08 6.09e-08 2.58e-07 1.44e-07 3.11e-07 erg/cm2
Peak flux Power-law 2.21e-01 2.62e-01 2.24e-01 3.27e-01 8.23e-01 1.03e+00 ph/cm2/s
Error 1.16e-01 8.93e-02 7.08e-02 2.06e-01 2.49e-01 3.05e-01 ph/cm2/s
Fluence Cutoff-PL 4.57e-08 1.17e-07 9.75e-08 1.65e-08 2.75e-07 2.79e-07 erg/cm2
Error 4.59e-08 5.39e-08 7.26e-08 1.39e-07 1.33e-07 2.66e-07 erg/cm2
Peak flux Cutoff-PL 1.07e-01 3.00e-01 2.84e-01 5.67e-02 7.41e-01 7.48e-01 ph/cm2/s
Error 1.32e-01 1.23e-01 9.75e-02 1.48e-01 2.61e-01 2.88e-01 ph/cm2/s
Fluence Band 1.76e-07 6.87e-07 7.11e-07 1.11e-06 1.97e-06 2.70e-06 erg/cm2
Error 7.56e-08 1.39e-07 1.87e-07 -------- 4.13e-07 -------- 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 1.944 0.763 - - 5.15e-04 2.53e-04 55.250 57
CPL -0.364 1.079 46.7 0.0 8.96e-03 0.00e+00 54.090 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.223 0.460 - - 6.98e-03 2.03e-03 44.280 57
CPL -1.685 4.521 68.9 114.9 1.49e-01 3.90e+01 41.020 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: 5.632000 sec.
T50 in the 50-300 keV band: 2.880000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.764 -0.940 63.824
T90 40.364 -0.028 40.336
T50 8.196 1.628 9.824
Peak 1.000 0.544 1.544
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
324.6961 -56.0706 0.0300 35.4 -7.1 0.7336 6.4 TRIG_00907950
------------------------------------------
Foreground time interval of the image:
-0.940 38.645 (delta_t = 39.585 [sec])
Background time interval of the image:
-239.056 -0.940 (delta_t = 238.116 [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 -0.940 sec. to 63.824 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.94429 ( -0.658168 0.866937 )
Norm@50keV : 5.15346E-04 ( -0.000263653 0.00024247 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.25 using 59 PHA bins.
# Reduced chi-squared = 0.9693 for 57 degrees of freedom
# Null hypothesis probability = 5.409997e-01
Photon flux (15-150 keV) in 64.76 sec: 7.53873E-02 ( -0.0290652 0.0290693 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.07087e-07 ( -1.39155e-07 1.49096e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.940 sec. to 63.824 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.363962 ( 0.514045 2.6723 )
Epeak [keV] : 46.6596 ( )
Norm@50keV : 8.96017E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.09 using 59 PHA bins.
# Reduced chi-squared = 0.9659 for 56 degrees of freedom
# Null hypothesis probability = 5.475640e-01
Photon flux (15-150 keV) in 64.76 sec: 6.94353E-02 ( -0.0309555 0.0306967 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.747e-07 ( -1.16225e-07 1.50323e-07 ) ergs/cm2
Band function
Time interval is from -0.940 sec. to 63.824 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.279305 ( -2.99606 2.78702 )
beta : -10.00000 ( 10 1.87494e-11 )
Epeak [keV] : 46.6672 ( -17.5584 479.431 )
Norm@50keV : 8.13095E-03 ( -0.00303928 4.18166 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.10 using 59 PHA bins.
# Reduced chi-squared = 0.9836 for 55 degrees of freedom
# Null hypothesis probability = 5.091598e-01
Photon flux (15-150 keV) in 64.76 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96837e-06 ( -1.96792e-06 -4.10021e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.9475 (-3.70316 5.13647)
R^2/D10^2 : 1.98536E-02 (-0.0198536 0.0565501)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.08 using 59 PHA bins.
# Reduced chi-squared = 0.9488 for 57 degrees of freedom
# Null hypothesis probability = 5.851843e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.880e-08 2.561e-08
25- 50 1.215e-07 7.716e-08
50-150 1.040e-07 7.953e-08
15-150 2.643e-07 1.677e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 73.2259 (-45.9736 -73.1007)
Norm : 0.371118 (-0.163704 0.300433)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.68 using 59 PHA bins.
# Reduced chi-squared = 0.9593 for 57 degrees of freedom
# Null hypothesis probability = 5.626976e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.194e-08 3.957e-08
25- 50 9.972e-08 6.369e-08
50-150 1.324e-07 1.171e-07
15-150 2.940e-07 2.025e-07
Double BB
R1^2/D10^2 : 2.15946E+06 (-2.2865e+06 -2.28655e+06)
kT2 [keV] : 12.7998 (-3.89923 5.81192)
R2^2/D10^2 : 1.45865E-02 (-0.0111256 0.0175659)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.08 using 59 PHA bins.
#Fit statistic : Chi-Squared = 50.61 using 59 PHA bins.
#Fit statistic : Chi-Squared = 50.33 using 59 PHA bins.
# Reduced chi-squared = 0.9833 for 55 degrees of freedom
# Reduced chi-squared = 0.9202 for 55 degrees of freedom
# Reduced chi-squared = 0.9152 for 55 degrees of freedom
# Null hypothesis probability = 5.096314e-01
# Null hypothesis probability = 6.428446e-01
# Null hypothesis probability = 6.532263e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.544 sec. to 1.544 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22313 ( -0.469736 0.450292 )
Norm@50keV : 6.98445E-03 ( -0.0020295 0.00202625 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.28 using 59 PHA bins.
# Reduced chi-squared = 0.7768 for 57 degrees of freedom
# Null hypothesis probability = 8.906520e-01
Photon flux (15-150 keV) in 1 sec: 0.822639 ( -0.247769 0.250295 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.0401e-08 ( -2.13432e-08 2.15747e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.544 sec. to 1.544 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.68460 ( -6.26197 2.78063 )
Epeak [keV] : 68.8866 ( -17.0885 212.75 )
Norm@50keV : 0.148913 ( -0.155101 77.7859 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.02 using 59 PHA bins.
# Reduced chi-squared = 0.7325 for 56 degrees of freedom
# Null hypothesis probability = 9.333429e-01
Photon flux (15-150 keV) in 1 sec: 0.741146 ( -0.255471 0.265924 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.21529e-08 ( -2.17215e-08 2.37186e-08 ) ergs/cm2
Band function
Time interval is from 0.544 sec. to 1.544 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.61868 ( -1.5884 3.02739 )
beta : -10.00000 ( 10 2.97891e-06 )
Epeak [keV] : 69.2203 ( -16.1124 209.282 )
Norm@50keV : 0.139810 ( -0.0385533 2.14126 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.02 using 59 PHA bins.
# Reduced chi-squared = 0.7459 for 55 degrees of freedom
# Null hypothesis probability = 9.193596e-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] : 17.9087 (-4.22583 6.42614)
R^2/D10^2 : 5.97986E-02 (-0.0394196 0.0917129)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.04 using 59 PHA bins.
# Reduced chi-squared = 0.7201 for 57 degrees of freedom
# Null hypothesis probability = 9.449945e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.846e-09 2.447e-09
25- 50 1.772e-08 9.704e-09
50-150 4.120e-08 2.651e-08
15-150 6.276e-08 3.914e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.355 (-99.4569 -199.361)
Norm : 3.49089 (-1.02279 1.02615)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.16 using 59 PHA bins.
# Reduced chi-squared = 0.7923 for 57 degrees of freedom
# Null hypothesis probability = 8.714206e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.693e-09 5.365e-09
25- 50 1.672e-08 1.033e-08
50-150 3.667e-08 2.227e-08
15-150 6.209e-08 3.712e-08
Double BB
#Fit statistic : Chi-Squared = 39.02 using 59 PHA bins.
# Reduced chi-squared = 0.7165 for 55 degrees of freedom
# Reduced chi-squared = 0.7130 for 55 degrees of freedom
# Reduced chi-squared = 0.7112 for 55 degrees of freedom
# Reduced chi-squared = 0.7103 for 55 degrees of freedom
# Reduced chi-squared = 0.7098 for 55 degrees of freedom
# Reduced chi-squared = 0.7095 for 55 degrees of freedom
# Null hypothesis probability = 9.442178e-01
# Null hypothesis probability = 9.467151e-01
# Null hypothesis probability = 9.480339e-01
# Null hypothesis probability = 9.486753e-01
# Null hypothesis probability = 9.490041e-01
# Null hypothesis probability = 9.491713e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.887e-09 2.447e-09
25- 50 1.679e-08 1.012e-08
50-150 4.210e-08 2.681e-08
15-150 6.378e-08 3.417e-08
Plot creation:
Wed Jun 12 20:38:56 EDT 2019