batgrbproduct analysis for trigger=912310
batgrbproduct Analysis for Trigger=912310
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): Tue Jul 2 17:00:22 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger912310/GCN5_download_cron
======================================================================
Trigger: 00912310 Segment: 000
BAT Trigger Time: 583667144 [s; MET]
Trigger Stop: 583667208 [s; MET]
UTC: 2019-07-01T09:45:20.833660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 28.0627118270664 Dec: 58.9063378051181 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.19
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.19
Flight Position: [ source = BAT ]
RA: 28.0627118270664 Dec: 58.9063378051181 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 28.1298876771162 Dec: 58.8996979225808 [deg; J2000]
{ 01h 52m 31.2s , +58d 53' 58.9" }
+/- 2.29970683510525 [arcmin] (estimated 90% radius based on SNR)
+/- 1.29647639651375 [arcmin] (formal 1-sigma fit error)
SNR: 9.25642772031579
Angular difference between Flight and Ground position is 2.119511 arcmin
Partial Coding Fraction: 0.5078125 [ including projection effects ]
Duration
T90: 52.4160001277924 +/- 3.99526125203921
Measured from: 35.9120000600815
to: 88.3280001878738 [s; relative to TRIGTIME]
T50: 43.1360000371933 +/- 31.1791725449819
Measured from: 39.5120000839233
to: 82.6480001211166 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 37.9160000085831
to: 38.9160000085831 [s; relative to TRIGTIME]
Total Fluence
Measured from: 35.0160000324249
to: 89.9919999837875 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.533845 0.602672 0.376081 -0.040525
0.073582 0.074772 0.064403 0.056611 [error]
Peak 0.037906 0.067025 0.026534 0.004539
0.011288 0.011769 0.009903 0.007968 [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 1.77e-07 2.56e-07 2.77e-07 5.56e-07 8.81e-07 1.27e-06 erg/cm2
Error 3.58e-08 3.52e-08 6.33e-08 2.57e-07 1.46e-07 3.23e-07 erg/cm2
Peak flux Power-law 4.52e-01 3.92e-01 2.32e-01 2.07e-01 1.16e+00 1.28e+00 ph/cm2/s
Error 1.62e-01 9.41e-02 7.90e-02 1.39e-01 2.79e-01 3.09e-01 ph/cm2/s
Fluence Cutoff-PL 1.73e-07 2.63e-07 2.77e-07 3.87e-07 8.65e-07 1.10e-06 erg/cm2
Error 3.66e-08 4.40e-08 6.64e-08 3.57e-07 1.61e-07 4.28e-07 erg/cm2
Peak flux Cutoff-PL 4.28e-01 4.28e-01 2.29e-01 7.85e-02 1.14e+00 1.16e+00 ph/cm2/s
Error 1.80e-01 1.52e-01 1.16e-01 1.28e-01 2.93e-01 3.60e-01 ph/cm2/s
Fluence Band 1.76e-07 3.33e-07 3.03e-07 4.52e-07 9.74e-07 1.27e-06 erg/cm2
Error 4.80e-08 -------- 8.67e-08 -------- -------- 4.80e-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 1.890 0.260 - - 1.79e-03 2.98e-04 54.840 57
CPL 1.690 0.827 68.2 0.0 2.31e-03 0.00e+00 54.700 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.754 0.416 - - 8.60e-03 2.29e-03 48.690 57
CPL 1.039 3.022 55.4 -1.6 2.26e-02 9.56e+00 48.310 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 54.976 35.016 89.992
T90 52.416 35.912 88.328
T50 43.136 39.512 82.648
Peak 1.000 37.916 38.916
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
28.1299 +58.8997 0.0208 32.3 -67.5 1.0511 9.3 TRIG_00912310
------------------------------------------
Foreground time interval of the image:
35.016 68.710 (delta_t = 33.694 [sec])
70.000 72.501 (delta_t = 2.501 [sec])
Background time interval of the image:
-239.000 35.016 (delta_t = 274.016 [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
Multiple GTIs in the spectrum
tstart tstop
35.016000 68.710000
70.000000 89.992000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89023 ( -0.251616 0.267709 )
Norm@50keV : 1.78550E-03 ( -0.000302663 0.000293088 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.84 using 59 PHA bins.
# Reduced chi-squared = 0.9621 for 57 degrees of freedom
# Null hypothesis probability = 5.566333e-01
Photon flux (15-150 keV) in 53.69 sec: 0.255182 ( -0.0352382 0.0352567 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.81284e-07 ( -1.44344e-07 1.47712e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
35.016000 68.710000
70.000000 89.992000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69041 ( -1.09653 0.556894 )
Epeak [keV] : 68.2098 ( )
Norm@50keV : 2.31156E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.70 using 59 PHA bins.
# Reduced chi-squared = 0.9768 for 56 degrees of freedom
# Null hypothesis probability = 5.241829e-01
Photon flux (15-150 keV) in 53.69 sec: 0.253251 ( -0.03631 0.036219 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.64951e-07 ( -1.61419e-07 1.60302e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
35.016000 68.710000
70.000000 89.992000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.69885 ( 1.69888 1.03753 )
beta : -9.37138 ( 9.37167 19.3717 )
Epeak [keV] : 70.4497 ( -56.7137 -70.3739 )
Norm@50keV : 2.27935E-03 ( -0.000674456 0.00202275 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.70 using 59 PHA bins.
# Reduced chi-squared = 0.9946 for 55 degrees of freedom
# Null hypothesis probability = 4.860154e-01
Photon flux (15-150 keV) in 53.69 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.73668e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.7111 (-1.75418 2.15785)
R^2/D10^2 : 9.12107E-02 (-0.0453974 0.0879184)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.39 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.435066e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.167e-07 3.471e-08
25- 50 3.188e-07 6.421e-08
50-150 2.023e-07 7.407e-08
15-150 6.378e-07 1.266e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 84.3186 (-31.7547 72.5476)
Norm : 1.17602 (-0.224627 0.298976)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.12 using 59 PHA bins.
# Reduced chi-squared = 0.9671 for 57 degrees of freedom
# Null hypothesis probability = 5.457867e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.643e-07 3.173e-08
25- 50 2.739e-07 5.060e-08
50-150 4.003e-07 2.238e-07
15-150 8.385e-07 2.319e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.41406 (-3.03404 3.30094)
R1^2/D10^2 : 0.812952 (-0.610843 34.7164)
kT2 [keV] : 19.7010 (-17.6558 30.251)
R2^2/D10^2 : 7.05163E-03 (-0.00611987 0.0446203)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.22 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 55 degrees of freedom
# Null hypothesis probability = 4.289502e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.729e-07 9.645e-08
25- 50 2.547e-07 1.328e-07
50-150 4.101e-07 2.378e-07
15-150 8.378e-07 4.303e-07
Peak spectrum fit
Power-law model
Time interval is from 37.916 sec. to 38.916 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75359 ( -0.405933 0.425752 )
Norm@50keV : 8.60188E-03 ( -0.00233202 0.00225796 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.69 using 59 PHA bins.
# Reduced chi-squared = 0.8541 for 57 degrees of freedom
# Null hypothesis probability = 7.754298e-01
Photon flux (15-150 keV) in 1 sec: 1.16466 ( -0.27914 0.279426 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.93568e-08 ( -2.15276e-08 2.2243e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 37.916 sec. to 38.916 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03946 ( -4.69687 1.34674 )
Epeak [keV] : 55.3630 ( -52.5564 -55.706 )
Norm@50keV : 2.26348E-02 ( -0.0221812 19.0963 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.31 using 59 PHA bins.
# Reduced chi-squared = 0.8627 for 56 degrees of freedom
# Null hypothesis probability = 7.576683e-01
Photon flux (15-150 keV) in 1 sec: 1.14024 ( -0.298214 0.28809 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.31555e-08 ( -2.72162e-08 2.68655e-08 ) ergs/cm2
Band function
Time interval is from 37.916 sec. to 38.916 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.88253 ( -4.2972 -4.2972 )
beta : -2.31589 ( -1.89331 0.782488 )
Epeak [keV] : 34.5695 ( -31.358 10.9962 )
Norm@50keV : 2.08516 ( -2.10022 171.884 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.95 using 59 PHA bins.
# Reduced chi-squared = 0.8536 for 55 degrees of freedom
# Null hypothesis probability = 7.715936e-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] : 10.2082 (-2.17667 3.15656)
R^2/D10^2 : 0.531233 (-0.344559 0.799951)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.65 using 59 PHA bins.
# Reduced chi-squared = 0.8711 for 57 degrees of freedom
# Null hypothesis probability = 7.444329e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.135e-08 6.133e-09
25- 50 2.905e-08 1.177e-08
50-150 1.609e-08 9.859e-09
15-150 5.648e-08 2.350e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.8708 (-54.8118 -99.8708)
Norm : 5.19977 (-1.48167 2.25779)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.31 using 59 PHA bins.
# Reduced chi-squared = 0.8476 for 57 degrees of freedom
# Null hypothesis probability = 7.869192e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.359e-08 7.679e-09
25- 50 2.349e-08 1.269e-08
50-150 3.805e-08 2.946e-08
15-150 7.513e-08 4.249e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.76585 (-2.83126 2.76388)
R1^2/D10^2 : 0.846661 (-0.555421 2.08867)
kT2 [keV] : 74.1797 (-59.9523 -74.4399)
R2^2/D10^2 : 5.48793E-04 (-0.000521135 0.0899103)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.94 using 59 PHA bins.
# Reduced chi-squared = 0.8352 for 55 degrees of freedom
# Null hypothesis probability = 8.029693e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.273e-08 7.325e-09
25- 50 2.731e-08 1.555e-08
50-150 3.995e-08 1.999e-08
15-150 7.999e-08 3.776e-08
Plot creation:
Tue Jul 2 17:04:31 EDT 2019