batgrbproduct analysis for trigger=815603
batgrbproduct Analysis for Trigger=815603
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): Mon Mar 19 22:20:34 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger815603/GCN5_download_cron
======================================================================
Trigger: 00815603 Segment: 000
BAT Trigger Time: 543114751.68 [s; MET]
Trigger Stop: 543114752.192 [s; MET]
UTC: 2018-03-19T01:12:11.033940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 275.094258726132 Dec: 7.16931550084611 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.31
Image Trigger?: NO
Rate S/N Ratio: 11.9582607431014 [ if not an image trigger ]
Image S/N Ratio: 9.31
Flight Position: [ source = BAT ]
RA: 275.094258726132 Dec: 7.16931550084611 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 275.053964127939 Dec: 7.36464338317213 [deg; J2000]
{ 18h 20m 13.0s , +07d 21' 52.7" }
+/- 8.52349747998775 [arcmin] (estimated 90% radius based on SNR)
+/- 7.50804148734131 [arcmin] (formal 1-sigma fit error)
SNR: 1.42450614491692
Angular difference between Flight and Ground position is 11.962540 arcmin
Partial Coding Fraction: 0.6328125 [ including projection effects ]
Duration
T90: 904.371999979019 +/- 198.484904547677
Measured from: -3.39999985694885
to: 900.97200012207 [s; relative to TRIGTIME]
T50: 470.363999962807 +/- 55.068626475378
Measured from: 260.528000116348
to: 730.892000079155 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.459999918937683
to: 0.540000081062317 [s; relative to TRIGTIME]
Total Fluence
Measured from: -201.387999892235
to: 949.060000061989 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 51.195519 64.816315 36.702460 5.202850
0.289753 0.284962 0.235512 0.185602 [error]
Peak 0.138129 0.144424 0.054546 0.009655
0.012164 0.011533 0.009075 0.006785 [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 2.24e-05 2.89e-05 2.73e-05 4.55e-05 9.38e-05 1.24e-04 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Power-law 1.60e+00 1.04e+00 4.43e-01 2.57e-01 3.22e+00 3.34e+00 ph/cm2/s
Error 2.15e-01 1.02e-01 7.29e-02 7.83e-02 3.15e-01 3.24e-01 ph/cm2/s
Fluence Cutoff-PL 1.79e-05 2.94e-05 2.94e-05 2.39e-05 8.95e-05 1.01e-04 erg/cm2
Error 8.12e-07 5.14e-07 4.87e-07 2.00e-06 1.38e-06 2.52e-06 erg/cm2
Peak flux Cutoff-PL 1.47e+00 1.18e+00 4.12e-01 6.32e-02 3.11e+00 3.13e+00 ph/cm2/s
Error 2.42e-01 1.49e-01 9.85e-02 9.46e-02 3.25e-01 3.35e-01 ph/cm2/s
Fluence Band 1.66e-05 2.97e-05 2.89e-05 3.37e-05 8.87e-05 1.09e-04 erg/cm2
Error 9.81e-07 5.71e-07 5.23e-07 2.47e-06 1.41e-06 2.61e-06 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 2.082 0.000 - - 8.81e-03 0.00e+00 186.510 57
CPL 1.324 0.114 52.0 2.3 1.86e-02 2.05e-03 39.920 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.239 0.179 - - 1.90e-02 2.40e-03 62.650 57
CPL 1.143 0.977 30.5 0.0 8.68e-02 0.00e+00 57.780 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: 573.120000 sec.
T50 in the 50-300 keV band: 377.856000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1150.450 -201.388 949.060
T90 904.372 -3.400 900.972
T50 470.364 260.528 730.892
Peak 1.000 -0.460 0.540
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
275.0540 +7.3646 0.1350 37.3 -162.1 0.9717 1.4 TRIG_00815603
------------------------------------------
Foreground time interval of the image:
-201.388 -54.680 (delta_t = 146.708 [sec])
-53.680 10.621 (delta_t = 64.301 [sec])
Background time interval of the image:
-239.680 -201.388 (delta_t = 38.292 [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
-201.388000 -54.680000
-53.680000 495.420000
496.320000 833.900000
835.320000 949.060000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08202 ( )
Norm@50keV : 8.81494E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 186.51 using 59 PHA bins.
# Reduced chi-squared = 3.2721 for 57 degrees of freedom
# Null hypothesis probability = 1.138506e-15
Photon flux (15-150 keV) in 1147 sec: 1.37464 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.37825e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-201.388000 -54.680000
-53.680000 495.420000
496.320000 833.900000
835.320000 949.060000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32371 ( -0.115211 0.112725 )
Epeak [keV] : 52.0066 ( -2.3578 2.14774 )
Norm@50keV : 1.86278E-02 ( -0.00191485 0.00217984 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.92 using 59 PHA bins.
# Reduced chi-squared = 0.7128 for 56 degrees of freedom
# Null hypothesis probability = 9.485355e-01
Photon flux (15-150 keV) in 1147 sec: 1.25167 ( -0.0293 0.02963 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.95445e-05 ( -1.38145e-06 1.38672e-06 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-201.388000 -54.680000
-53.680000 495.420000
496.320000 833.900000
835.320000 949.060000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.976554 ( -0.223685 0.27598 )
beta : -2.48186 ( -0.130141 0.0923647 )
Epeak [keV] : 49.1330 ( -2.53039 2.39864 )
Norm@50keV : 2.82284E-02 ( -0.00643711 0.0113305 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 27.51 using 59 PHA bins.
# Reduced chi-squared = 0.5001 for 55 degrees of freedom
# Null hypothesis probability = 9.992926e-01
Photon flux (15-150 keV) in 1147 sec: 1.22152 ( 5.77848 -0.03282 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.87132e-05 ( -8.87052e-05 -1.40989e-06 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.9732 ( )
R^2/D10^2 : 0.121299 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1087.79 using 59 PHA bins.
# Reduced chi-squared = 19.0840 for 57 degrees of freedom
# Null hypothesis probability = 1.907371e-190
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.533e-06 1.870e-07
25- 50 2.591e-05 5.506e-07
50-150 3.951e-05 7.341e-07
15-150 7.195e-05 9.348e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 82.1545 (-2.78999 2.96034)
Norm : 5.95494 (-0.150321 0.153691)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.96 using 59 PHA bins.
# Reduced chi-squared = 0.6836 for 57 degrees of freedom
# Null hypothesis probability = 9.675195e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.775e-05 4.473e-07
25- 50 2.941e-05 4.875e-07
50-150 4.225e-05 7.111e-07
15-150 8.942e-05 1.158e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.30899 (-0.422574 0.427636)
R1^2/D10^2 : 0.816216 (-0.127533 0.161302)
kT2 [keV] : 24.0561 (-1.24094 1.46174)
R2^2/D10^2 : 1.25044E-02 (-0.00291055 0.00343073)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.93 using 59 PHA bins.
# Reduced chi-squared = 1.308 for 55 degrees of freedom
# Null hypothesis probability = 6.236967e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.347e-05 7.111e-07
25- 50 3.059e-05 6.767e-07
50-150 4.191e-05 9.348e-07
15-150 8.598e-05 1.738e-06
Peak spectrum fit
Power-law model
Time interval is from -0.460 sec. to 0.540 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.23861 ( -0.174327 0.184638 )
Norm@50keV : 1.90292E-02 ( -0.00241939 0.00237461 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.65 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 57 degrees of freedom
# Null hypothesis probability = 2.828972e-01
Photon flux (15-150 keV) in 1 sec: 3.21572 ( -0.315109 0.315362 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.79948e-07 ( -1.96732e-08 1.99252e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.460 sec. to 0.540 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14265 ( -1.18086 0.772936 )
Epeak [keV] : 30.5164 ( )
Norm@50keV : 8.68278E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.78 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 56 degrees of freedom
# Null hypothesis probability = 4.092111e-01
Photon flux (15-150 keV) in 1 sec: 3.11485 ( -0.32548 0.32528 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.64405e-07 ( -2.1739e-08 2.3041e-08 ) ergs/cm2
Band function
Time interval is from -0.460 sec. to 0.540 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.974323 ( -1.62973 -0.0700356 )
beta : -2.70192 ( 2.71475 0.403744 )
Epeak [keV] : 28.3833 ( -6.37861 6.60946 )
Norm@50keV : 2.79557 ( -2.6948 1383.82 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 55 degrees of freedom
# Null hypothesis probability = 4.686688e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69612e-07 ( -1.69605e-07 -2.0669e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.60128 (-0.854103 0.951261)
R^2/D10^2 : 2.68347 (-0.933673 1.42474)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.65 using 59 PHA bins.
# Reduced chi-squared = 1.204 for 57 degrees of freedom
# Null hypothesis probability = 1.386730e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.769e-08 6.085e-09
25- 50 7.452e-08 8.710e-09
50-150 2.470e-08 6.890e-09
15-150 1.369e-07 1.740e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 45.4389 (-9.70432 13.9358)
Norm : 19.3471 (-3.15947 4.01666)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.81 using 59 PHA bins.
# Reduced chi-squared = 1.014 for 57 degrees of freedom
# Null hypothesis probability = 4.452223e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.618e-08 6.095e-09
25- 50 6.401e-08 7.050e-09
50-150 5.662e-08 1.483e-08
15-150 1.668e-07 2.215e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.88209 (-1.67337 1.32)
R1^2/D10^2 : 5.53466 (-2.55124 3.32273)
kT2 [keV] : 23.7627 (-10.4967 45.9351)
R2^2/D10^2 : 2.22824E-02 (-0.0214289 0.273552)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.36 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Null hypothesis probability = 4.610453e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.361e-08 1.137e-08
25- 50 6.719e-08 2.058e-08
50-150 6.072e-08 3.278e-08
15-150 1.715e-07 5.863e-08
Plot creation:
Mon Mar 19 22:26:39 EDT 2018