batgrbproduct analysis for trigger=752193
batgrbproduct Analysis for Trigger=752193
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 May 11 06:01:43 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger752193/GCN5_download_cron
======================================================================
Trigger: 00752193 Segment: 000
BAT Trigger Time: 516089554.496 [s; MET]
Trigger Stop: 516089555.52 [s; MET]
UTC: 2017-05-10T06:12:15.458880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 297.661024030469 Dec: 48.1775855809173 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.53
Image Trigger?: NO
Rate S/N Ratio: 27.7308492477241 [ if not an image trigger ]
Image S/N Ratio: 6.53
Flight Position: [ source = BAT ]
RA: 297.661024030469 Dec: 48.1775855809173 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 297.323152896641 Dec: 48.1823338654563 [deg; J2000]
{ 19h 49m 17.6s , +48d 10' 56.4" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 11.1473471231965 [arcmin] (formal 1-sigma fit error)
SNR: -0.820490186990435
Angular difference between Flight and Ground position is 13.520401 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 43.067999958992 +/- 8.77693541147387
Measured from: -25.7359998822212
to: 17.3320000767708 [s; relative to TRIGTIME]
T50: 27.3159999251366 +/- 9.35838296965223
Measured from: -13.203999876976
to: 14.1120000481606 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0440000295639038
to: 1.0440000295639 [s; relative to TRIGTIME]
Total Fluence
Measured from: -32.8679999709129
to: 26.3719999790192 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.286025 0.623906 0.255103 0.027938
0.064289 0.075432 0.068070 0.083164 [error]
Peak -0.008063 0.019358 0.034324 0.040422
0.008460 0.009930 0.008976 0.011088 [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 1.01e-07 1.81e-07 2.47e-07 6.99e-07 7.13e-07 1.23e-06 erg/cm2
Error 2.42e-08 3.05e-08 6.29e-08 3.57e-07 1.52e-07 4.21e-07 erg/cm2
Peak flux Power-law 1.34e-021.09e-03 5.20e-029.17e-03 1.69e-016.88e-02 1.80e+002.95e+00 4.76e-012.58e-01 2.04e+003.03e+00 ph/cm2/s
Error 3.11e-02 6.63e-02 1.14e-01 1.79e+00 2.95e-01 1.71e+00 ph/cm2/s
Fluence Cutoff-PL 8.23e-08 2.54e-07 1.63e-07 1.00e-08 5.09e-07 5.09e-07 erg/cm2
Error 3.03e-08 5.82e-08 1.34e-07 7.01e-08 1.40e-07 1.56e-07 erg/cm2
Peak flux Cutoff-PL 1.75e-02 6.06e-02 1.74e-01 1.60e+00 4.84e-01 1.83e+00 ph/cm2/s
Error 3.11e-02 6.64e-02 1.28e-01 -------- 3.29e-01 -------- ph/cm2/s
Fluence Band 7.58e-08 2.59e-07 1.87e-07 1.52e-07 5.91e-07 6.75e-07 erg/cm2
Error 2.81e-08 5.24e-08 -------- -------- -------- -------- 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 1.548 0.282 - - 1.28e-03 2.46e-04 93.850 57
CPL -1.714 3.405 43.7 12.7 1.17e-01 3.12e+01 86.840 56
The chi2 of BB fit is 86.99 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.907 1.341 - - 6.15e-04 2.42e-03 58.120 57
CPL -0.721 3.516 10000.0 0.0 2.59e-03 0.00e+00 58.520 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: 24.768000 sec.
T50 in the 50-300 keV band: 14.336000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 59.240 -32.868 26.372
T90 43.068 -25.736 17.332
T50 27.316 -13.204 14.112
Peak 1.000 0.044 1.044
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
297.3232 +48.1823 0.2342 3.2 -149.2 -1.1433 -0.8 TRIG_00752193
------------------------------------------
Foreground time interval of the image:
-32.868 18.005 (delta_t = 50.873 [sec])
Background time interval of the image:
-33.195 -32.868 (delta_t = 0.327 [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 -32.868 sec. to 26.372 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54786 ( -0.276711 0.287357 )
Norm@50keV : 1.27862E-03 ( -0.000248056 0.000243266 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 93.85 using 59 PHA bins.
# Reduced chi-squared = 1.647 for 57 degrees of freedom
# Null hypothesis probability = 1.524149e-03
Photon flux (15-150 keV) in 59.24 sec: 0.161765 ( -0.0273982 0.0274095 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.1325e-07 ( -1.48752e-07 1.55331e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -32.868 sec. to 26.372 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.71363 ( -4.72681 2.08243 )
Epeak [keV] : 43.6821 ( -7.25672 18.1029 )
Norm@50keV : 0.116548 ( -0.127268 62.2914 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.84 using 59 PHA bins.
# Reduced chi-squared = 1.551 for 56 degrees of freedom
# Null hypothesis probability = 5.154532e-03
Photon flux (15-150 keV) in 59.24 sec: 0.146168 ( -0.027251 0.02789 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.08769e-07 ( -1.14839e-07 1.65252e-07 ) ergs/cm2
Band function
Time interval is from -32.868 sec. to 26.372 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.71043 ( -2.63915 -2.82466 )
beta : -2.85803 ( 2.84087 0.920474 )
Epeak [keV] : 38.5699 ( -7.96029 10.8305 )
Norm@50keV : 2.35823 ( -2.35778 5.22603 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.57 using 59 PHA bins.
# Reduced chi-squared = 1.538 for 55 degrees of freedom
# Null hypothesis probability = 6.356129e-03
Photon flux (15-150 keV) in 59.24 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.91033e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.2801 (-1.63057 2.01484)
R^2/D10^2 : 5.37566E-02 (-0.0243301 0.0404577)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.99 using 59 PHA bins.
# Reduced chi-squared = 1.526 for 57 degrees of freedom
# Null hypothesis probability = 6.420879e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.505e-08 2.600e-08
25- 50 2.483e-07 5.885e-08
50-150 1.819e-07 7.008e-08
15-150 5.152e-07 1.144e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 154.829 (-80.6256 -152.59)
Norm : 0.673080 (-0.115838 0.147716)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.15 using 59 PHA bins.
# Reduced chi-squared = 1.617 for 57 degrees of freedom
# Null hypothesis probability = 2.207513e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.021e-07 5.755e-08
25- 50 1.902e-07 1.057e-07
50-150 3.802e-07 2.296e-07
15-150 6.726e-07 3.895e-07
Double BB
R1^2/D10^2 : 1.30363E-05 (-1.30363e-05 -1.30363e-05)
kT2 [keV] : 10.3399 (-1.5874 2.07138)
R2^2/D10^2 : 6.82029E-02 (-0.0321779 0.0497884)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.99 using 59 PHA bins.
#Fit statistic : Chi-Squared = 84.88 using 59 PHA bins.
#Fit statistic : Chi-Squared = 84.67 using 59 PHA bins.
# Reduced chi-squared = 1.582 for 55 degrees of freedom
# Reduced chi-squared = 1.543 for 55 degrees of freedom
# Reduced chi-squared = 1.539 for 55 degrees of freedom
# Null hypothesis probability = 3.859489e-03
# Null hypothesis probability = 5.972940e-03
# Null hypothesis probability = 6.232044e-03
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 0.044 sec. to 1.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.90710 ( -0.474441 2.20734 )
Norm@50keV : 6.15298E-04 ( -0.000615282 0.00423144 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.12 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.337007e-01
Photon flux (15-150 keV) in 1 sec: 0.475695 0.257698 ( -0.190192 0.400533 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.37972e-15 ( -3.36054e-08 4.99238e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.044 sec. to 1.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.720624 ( -5.74738 1.28501 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 2.59408E-03 ( -0.00259543 -0.00259543 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.52 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 56 degrees of freedom
# Null hypothesis probability = 3.828941e-01
Photon flux (15-150 keV) in 1 sec: 0.483828 0.243087 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.76713e-15 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.044 sec. to 1.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.80268E-02 ( 0.12459 0.12459 )
beta : 1.90759 ( -2.16309 0.475559 )
Epeak [keV] : 13.8493 ( -13.8513 -13.8513 )
Norm@50keV : 1.21927E-03 ( -0.00121967 6163.5 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.12 using 59 PHA bins.
# Reduced chi-squared = 1.057 for 55 degrees of freedom
# Null hypothesis probability = 3.610290e-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 : 2.65468E-04 (-8.89989e-05 -0.000265316)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.66 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 57 degrees of freedom
# Null hypothesis probability = 4.144678e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.413e-10 3.692e-10
25- 50 3.558e-09 2.835e-09
50-150 6.954e-08 6.700e-08
15-150 7.354e-08 7.665e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 (-104.246 -199.362)
Norm : 1.49905 (-0.858696 0.861877)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.47 using 59 PHA bins.
# Reduced chi-squared = 1.307 for 57 degrees of freedom
# Null hypothesis probability = 5.998283e-02
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
Double BB
R1^2/D10^2 : 1.11234E-02 (-0.00540084 -0.00540084)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 2.49037E-04 (-0.000252524 -0.000252524)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.93 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.66 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.47 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 55 degrees of freedom
# Reduced chi-squared = 1.067 for 55 degrees of freedom
# Reduced chi-squared = 1.063 for 55 degrees of freedom
# Null hypothesis probability = 3.339470e-01
# Null hypothesis probability = 3.428870e-01
# Null hypothesis probability = 3.491888e-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
Plot creation:
Thu May 11 06:29:36 EDT 2017