batgrbproduct analysis for trigger=796100
batgrbproduct Analysis for Trigger=796100
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): Sun Dec 10 11:01:38 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger796100/batgroup_hand_proc
======================================================================
Trigger: 00796100 Segment: 000
BAT Trigger Time: 534523596.352 [s; MET]
Trigger Stop: 534523600.448 [s; MET]
UTC: 2017-12-09T14:46:16.223100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 139.381678720042 Dec: -30.5276478397297 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.97
Image Trigger?: NO
Rate S/N Ratio: 9 [ if not an image trigger ]
Image S/N Ratio: 7.97
Flight Position: [ source = BAT ]
RA: 139.381678720042 Dec: -30.5276478397297 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 139.386827755818 Dec: -30.522898752921 [deg; J2000]
{ 09h 17m 32.8s , -30d 31' 22.4" }
+/- 1.22291823167493 [arcmin] (estimated 90% radius based on SNR)
+/- 0.507683091509645 [arcmin] (formal 1-sigma fit error)
SNR: 22.8173352447555
Angular difference between Flight and Ground position is 0.389892 arcmin
Partial Coding Fraction: 0.6171875 [ including projection effects ]
Duration
T90: 161.647999942303 +/- 30.7587722246145
Measured from: -5.2039999961853
to: 156.443999946117 [s; relative to TRIGTIME]
T50: 70.1039999723434 +/- 4.36929745260489
Measured from: 18.5
to: 88.6039999723434 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 79.5159999728203
to: 80.5159999728203 [s; relative to TRIGTIME]
Total Fluence
Measured from: -70.755999982357
to: 228.43599998951 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.266602 4.412857 3.281470 0.778833
0.125508 0.131204 0.114638 0.100451 [error]
Peak 0.053189 0.078453 0.046665 0.008595
0.006941 0.007601 0.006712 0.005318 [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 1.09e-06 1.92e-06 2.57e-06 7.07e-06 7.47e-06 1.26e-05 erg/cm2
Error 7.37e-08 7.46e-08 1.19e-07 7.33e-07 2.84e-07 8.06e-07 erg/cm2
Peak flux Power-law 5.36e-01 5.33e-01 3.71e-01 4.09e-01 1.60e+00 1.85e+00 ph/cm2/s
Error 1.00e-01 6.32e-02 5.52e-02 1.22e-01 1.83e-01 2.14e-01 ph/cm2/s
Fluence Cutoff-PL 1.08e-06 1.93e-06 2.59e-06 6.25e-06 7.43e-06 1.18e-05 erg/cm2
Error 8.91e-08 6.27e-08 1.26e-07 1.48e-06 3.16e-07 1.41e-06 erg/cm2
Peak flux Cutoff-PL 4.98e-01 5.60e-01 3.84e-01 2.36e-01 1.58e+00 1.68e+00 ph/cm2/s
Error 1.19e-01 7.90e-02 6.17e-02 1.80e-01 1.90e-01 2.91e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- 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 1.577 0.067 - - 2.66e-03 9.48e-05 57.800 57
CPL 1.496 0.201 324.2 0.0 2.91e-03 6.46e-04 57.500 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.522 0.193 - - 1.28e-02 1.51e-03 48.020 57
CPL 1.048 0.818 97.7 -29.6 2.25e-02 2.95e-02 46.990 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: 170.880000 sec.
T50 in the 50-300 keV band: 73.152000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 299.192 -70.756 228.436
T90 161.648 -5.204 156.444
T50 70.104 18.500 88.604
Peak 1.000 79.516 80.516
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
139.3868 -30.5229 0.0085 31.5 25.8 4.7420 22.8 TRIG_00796100
------------------------------------------
Foreground time interval of the image:
-70.756 36.749 (delta_t = 107.505 [sec])
Background time interval of the image:
-239.352 -70.756 (delta_t = 168.596 [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 -70.756 sec. to 228.436 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57682 ( -0.0670118 0.0671897 )
Norm@50keV : 2.66250E-03 ( -9.485e-05 9.4708e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.80 using 59 PHA bins.
# Reduced chi-squared = 1.014 for 57 degrees of freedom
# Null hypothesis probability = 4.455237e-01
Photon flux (15-150 keV) in 299.2 sec: 0.339735 ( -0.0129287 0.0129827 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.47195e-06 ( -2.83167e-07 2.84295e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -70.756 sec. to 228.436 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49593 ( -0.262705 0.139791 )
Epeak [keV] : 324.163 ( -324.17 -324.17 )
Norm@50keV : 2.91338E-03 ( -0.000333269 0.000958175 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.50 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 56 degrees of freedom
# Null hypothesis probability = 4.194038e-01
Photon flux (15-150 keV) in 299.2 sec: 0.337811 ( -0.014112 0.007037 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.42779e-06 ( -3.19994e-07 3.11886e-07 ) ergs/cm2
Band function
Time interval is from -70.756 sec. to 228.436 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.755162 ( -0.917267 -0.917267 )
beta : -1.61961 ( 1.60775 0.0809411 )
Epeak [keV] : 47.1294 ( -47.0326 473.28 )
Norm@50keV : 9.21430E-03 ( -0.00941278 216.421 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.26 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.276101e-01
Photon flux (15-150 keV) in 299.2 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] : 15.2382 ( )
R^2/D10^2 : 3.43065E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 247.49 using 59 PHA bins.
# Reduced chi-squared = 4.3419 for 57 degrees of freedom
# Null hypothesis probability = 1.420608e-25
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.977e-07 3.336e-08
25- 50 2.006e-06 9.500e-08
50-150 3.192e-06 2.314e-07
15-150 5.696e-06 2.289e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-33.9824 -200)
Norm : 1.36608 (-0.0481345 0.0481345)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.64 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 57 degrees of freedom
# Null hypothesis probability = 3.800103e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.019e-06 4.742e-08
25- 50 1.961e-06 8.512e-08
50-150 4.297e-06 1.930e-07
15-150 7.277e-06 3.142e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.19822 (-0.860868 0.943833)
R1^2/D10^2 : 0.335194 (-0.113343 0.190777)
kT2 [keV] : 27.9337 (-3.53861 5.16787)
R2^2/D10^2 : 3.24301E-03 (-0.001435 0.00205212)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.88 using 59 PHA bins.
# Reduced chi-squared = 1.125 for 55 degrees of freedom
# Null hypothesis probability = 2.440129e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.822e-07 1.281e-07
25- 50 1.980e-06 1.711e-07
50-150 4.405e-06 5.131e-07
15-150 7.367e-06 7.450e-07
Peak spectrum fit
Power-law model
Time interval is from 79.516 sec. to 80.516 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52190 ( -0.191551 0.195337 )
Norm@50keV : 1.27615E-02 ( -0.00151273 0.00149949 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.02 using 59 PHA bins.
# Reduced chi-squared = 0.8425 for 57 degrees of freedom
# Null hypothesis probability = 7.955785e-01
Photon flux (15-150 keV) in 1 sec: 1.60270 ( -0.183235 0.183394 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.20641e-07 ( -1.55547e-08 1.57297e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 79.516 sec. to 80.516 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04796 ( -0.961906 0.674654 )
Epeak [keV] : 97.6741 ( -38.4095 -97.6898 )
Norm@50keV : 2.25320E-02 ( -0.0109241 0.0481338 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.99 using 59 PHA bins.
# Reduced chi-squared = 0.8391 for 56 degrees of freedom
# Null hypothesis probability = 7.989518e-01
Photon flux (15-150 keV) in 1 sec: 1.57548 ( -0.19003 0.18915 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16407e-07 ( -1.757e-08 1.7342e-08 ) ergs/cm2
Band function
Time interval is from 79.516 sec. to 80.516 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.637034 ( 0.727843 0.727843 )
beta : -1.83776 ( 1.84513 0.446375 )
Epeak [keV] : 65.4038 ( -64.0324 616.819 )
Norm@50keV : 3.99260E-02 ( -0.04188 1251.72 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.42 using 59 PHA bins.
# Reduced chi-squared = 0.8440 for 55 degrees of freedom
# Null hypothesis probability = 7.882157e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16434e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.8894 (-1.77832 2.12482)
R^2/D10^2 : 0.240942 (-0.0958193 0.151159)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.68 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 57 degrees of freedom
# Null hypothesis probability = 3.785780e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.826e-09 2.045e-09
25- 50 3.626e-08 5.520e-09
50-150 4.587e-08 1.000e-08
15-150 9.195e-08 1.348e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.333 (-80.5888 -199.347)
Norm : 6.56717 (-0.739114 0.739858)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.17 using 59 PHA bins.
# Reduced chi-squared = 0.8276 for 57 degrees of freedom
# Null hypothesis probability = 8.200945e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.635e-08 9.270e-09
25- 50 3.146e-08 1.719e-08
50-150 6.899e-08 3.815e-08
15-150 1.168e-07 6.410e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.92598 (-5.91026 2.77991)
R1^2/D10^2 : 0.611684 (-0.300689 8.06807)
kT2 [keV] : 42.1207 (-41.435 -45.6321)
R2^2/D10^2 : 3.37512E-03 (-0.0024691 0.100507)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.89 using 59 PHA bins.
# Reduced chi-squared = 0.8707 for 55 degrees of freedom
# Null hypothesis probability = 7.405683e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.299e-08 5.394e-09
25- 50 3.527e-08 1.516e-08
50-150 6.778e-08 3.627e-08
15-150 1.160e-07 5.421e-08
Plot creation:
Sun Dec 10 11:25:45 EST 2017