batgrbproduct analysis for trigger=929981
batgrbproduct Analysis for Trigger=929981
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): Fri Oct 18 17:40:36 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger929981/GCN5_download_cron
======================================================================
Trigger: 00929981 Segment: 000
BAT Trigger Time: 593015790.656 [s; MET]
Trigger Stop: 593015792.704 [s; MET]
UTC: 2019-10-17T14:36:06.891740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.150879225388 Dec: -73.5615431668346 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.63
Image Trigger?: NO
Rate S/N Ratio: 10.3923048454133 [ if not an image trigger ]
Image S/N Ratio: 8.63
Flight Position: [ source = BAT ]
RA: 245.150879225388 Dec: -73.5615431668346 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.130616361768 Dec: -73.5827061449708 [deg; J2000]
{ 16h 20m 31.3s , -73d 34' 57.7" }
+/- 1.78181351356298 [arcmin] (estimated 90% radius based on SNR)
+/- 0.702247110343712 [arcmin] (formal 1-sigma fit error)
SNR: 13.3273480433018
Angular difference between Flight and Ground position is 1.315506 arcmin
Partial Coding Fraction: 0.4414062 [ including projection effects ]
Duration
T90: 5.95200002193451 +/- 1.28209826158609
Measured from: -0.807999849319458
to: 5.14400017261505 [s; relative to TRIGTIME]
T50: 2.67200005054474 +/- 0.634577021043141
Measured from: 0.472000122070312
to: 3.14400017261505 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.363999962806702
to: 1.3639999628067 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.33599996566772
to: 5.59200000762939 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.273848 0.421881 0.202210 0.054940
0.031765 0.035071 0.033401 0.037444 [error]
Peak 0.053534 0.089526 0.060427 0.020799
0.012430 0.013693 0.012800 0.014370 [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 1.06e-07 1.59e-07 1.80e-07 3.88e-07 5.61e-07 8.33e-07 erg/cm2
Error 1.62e-08 1.72e-08 3.22e-08 1.38e-07 7.49e-08 1.72e-07 erg/cm2
Peak flux Power-law 6.39e-01 6.35e-01 4.42e-01 4.86e-01 1.91e+00 2.20e+00 ph/cm2/s
Error 1.87e-01 1.18e-01 1.08e-01 2.40e-01 3.44e-01 4.10e-01 ph/cm2/s
Fluence Cutoff-PL 9.76e-08 1.82e-07 1.62e-07 6.12e-08 4.87e-07 5.02e-07 erg/cm2
Error 1.82e-08 2.67e-08 4.56e-08 1.45e-07 8.90e-08 1.72e-07 erg/cm2
Peak flux Cutoff-PL 6.02e-01 6.66e-01 4.52e-01 2.80e-01 1.88e+00 2.00e+00 ph/cm2/s
Error 1.60e-01 1.49e-01 1.17e-01 3.60e-01 3.55e-01 3.70e-01 ph/cm2/s
Fluence Band 9.26e-08 1.87e-07 1.57e-07 2.19e-07 5.18e-07 6.57e-07 erg/cm2
Error 1.92e-08 -------- 3.76e-08 -------- -------- -------- erg/cm2
Peak flux Band 5.98e-01 6.96e-01 4.53e-01 3.67e-01 1.91e+00 2.12e+00 ph/cm2/s
Error -------- -------- -------- -------- 3.62e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.823 0.197 - - 8.81e-03 1.15e-03 61.760 57
CPL 0.678 1.206 45.8 28.3 4.22e-02 1.54e-01 57.910 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.522 0.317 - - 1.52e-02 2.90e-03 51.690 57
CPL 1.089 1.155 98.3 0.0 2.60e-02 8.40e-02 51.330 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 6.928 -1.336 5.592
T90 5.952 -0.808 5.144
T50 2.672 0.472 3.144
Peak 1.000 0.364 1.364
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.1306 -73.5827 0.0144 38.3 21.9 0.9438 13.3 TRIG_00929981
------------------------------------------
Foreground time interval of the image:
-1.336 5.592 (delta_t = 6.928 [sec])
Background time interval of the image:
-119.656 -1.336 (delta_t = 118.320 [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 -1.336 sec. to 5.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82302 ( -0.192253 0.20096 )
Norm@50keV : 8.80806E-03 ( -0.00116334 0.00114129 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.76 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 57 degrees of freedom
# Null hypothesis probability = 3.099020e-01
Photon flux (15-150 keV) in 6.928 sec: 1.22474 ( -0.131743 0.131749 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.61386e-07 ( -7.39564e-08 7.59302e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.336 sec. to 5.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.677501 ( -1.40184 1.01033 )
Epeak [keV] : 45.8248 ( -9.01384 47.6079 )
Norm@50keV : 4.22226E-02 ( -0.0426617 0.264565 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.91 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 56 degrees of freedom
# Null hypothesis probability = 4.046358e-01
Photon flux (15-150 keV) in 6.928 sec: 1.16921 ( -0.13881 0.13984 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.86657e-07 ( -8.07334e-08 9.72885e-08 ) ergs/cm2
Band function
Time interval is from -1.336 sec. to 5.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.42643 ( -5.28582 -4.42643 )
beta : -2.27002 ( -0.400737 0.319364 )
Epeak [keV] : 29.0439 ( -3.5487 3.57657 )
Norm@50keV : 209.852 ( -22.2153 1407.63 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.33 using 59 PHA bins.
# Reduced chi-squared = 0.9879 for 55 degrees of freedom
# Null hypothesis probability = 5.000443e-01
Photon flux (15-150 keV) in 6.928 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.17876e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.0343 (-1.11954 1.29244)
R^2/D10^2 : 0.581564 (-0.214175 0.328098)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.05 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 57 degrees of freedom
# Null hypothesis probability = 2.428779e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.271e-08 1.572e-08
25- 50 2.067e-07 2.910e-08
50-150 1.089e-07 3.138e-08
15-150 3.983e-07 5.532e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 82.8518 (-25.7503 49.6834)
Norm : 5.71999 (-0.834566 1.05701)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.76 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 57 degrees of freedom
# Null hypothesis probability = 4.106437e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.030e-07 1.593e-08
25- 50 1.710e-07 2.352e-08
50-150 2.471e-07 1.194e-07
15-150 5.212e-07 1.231e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.94745 (-2.00832 1.71893)
R1^2/D10^2 : 1.14695 (-0.449329 1.1403)
kT2 [keV] : 30.1957 (-23.1707 -39.9581)
R2^2/D10^2 : 4.93334E-03 (-0.00219279 0.0255128)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.28 using 59 PHA bins.
# Reduced chi-squared = 0.9868 for 55 degrees of freedom
# Null hypothesis probability = 5.022387e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.516e-08 3.614e-08
25- 50 1.863e-07 7.388e-08
50-150 2.331e-07 1.270e-07
15-150 5.145e-07 2.355e-07
Peak spectrum fit
Power-law model
Time interval is from 0.364 sec. to 1.364 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52218 ( -0.312406 0.320776 )
Norm@50keV : 1.51944E-02 ( -0.00292229 0.00286949 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.69 using 59 PHA bins.
# Reduced chi-squared = 0.9068 for 57 degrees of freedom
# Null hypothesis probability = 6.738887e-01
Photon flux (15-150 keV) in 1 sec: 1.90840 ( -0.343724 0.344002 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43635e-07 ( -2.99193e-08 3.06993e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.364 sec. to 1.364 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08856 ( -1.57898 0.730208 )
Epeak [keV] : 98.2640 ( -98.2663 -98.2663 )
Norm@50keV : 2.59502E-02 ( -0.0134504 0.15457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.33 using 59 PHA bins.
# Reduced chi-squared = 0.9166 for 56 degrees of freedom
# Null hypothesis probability = 6.519521e-01
Photon flux (15-150 keV) in 1 sec: 1.87561 ( -0.35716 0.35272 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37717e-07 ( -3.3988e-08 3.4559e-08 ) ergs/cm2
Band function
Time interval is from 0.364 sec. to 1.364 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.91013 ( -1.99312 -1.99312 )
beta : -1.72762 ( 1.70628 0.427975 )
Epeak [keV] : 29.1761 ( -31.8138 140.171 )
Norm@50keV : 120.482 ( -120.451 212.662 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.63 using 59 PHA bins.
# Reduced chi-squared = 0.9205 for 55 degrees of freedom
# Null hypothesis probability = 6.422989e-01
Photon flux (15-150 keV) in 1 sec: 1.91154 ( 5.08846 -0.35419 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39342e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5606 (-2.79279 3.65131)
R^2/D10^2 : 0.308710 (-0.17603 0.39025)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.22 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 57 degrees of freedom
# Null hypothesis probability = 4.670664e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.202e-08 4.403e-09
25- 50 4.329e-08 1.395e-08
50-150 5.154e-08 2.142e-08
15-150 1.068e-07 3.159e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.040 (-113.068 -199.125)
Norm : 7.79757 (-1.38908 1.60035)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.37 using 59 PHA bins.
# Reduced chi-squared = 0.9012 for 57 degrees of freedom
# Null hypothesis probability = 6.854158e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.942e-08 1.135e-08
25- 50 3.735e-08 2.097e-08
50-150 8.187e-08 4.657e-08
15-150 1.386e-07 8.015e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.20847 (-3.66261 2.69107)
R1^2/D10^2 : 1.85347 (-1.48828 20.5978)
kT2 [keV] : 25.9438 (-17.8154 -25.951)
R2^2/D10^2 : 2.34681E-02 (-0.0232009 0.182577)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.11 using 59 PHA bins.
# Reduced chi-squared = 0.9293 for 55 degrees of freedom
# Null hypothesis probability = 6.238956e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.862e-08 1.067e-08
25- 50 3.863e-08 2.009e-08
50-150 8.135e-08 4.778e-08
15-150 1.386e-07 7.245e-08
Plot creation:
Fri Oct 18 17:45:34 EDT 2019