batgrbproduct Analysis for Trigger=619182
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 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Fri Nov 21 14:14:31 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger619182/GCN5_download_cron
======================================================================
Trigger: 00619182 Segment: 000
BAT Trigger Time: 438234656 [s; MET]
Trigger Stop: 438234944 [s; MET]
UTC: 2014-11-21T03:50:43.185060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 122.667985354439 Dec: 22.2254978756992 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.91
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.91
Flight Position: [ source = BAT ]
RA: 122.667985354439 Dec: 22.2254978756992 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 122.664098110896 Dec: 22.2052739009469 [deg; J2000]
{ 08h 10m 39.4s , +22d 12' 19.0" }
+/- 2.08500463733457 [arcmin] (estimated 90% radius based on SNR)
+/- 0.935721243307916 [arcmin] (formal 1-sigma fit error)
SNR: 10.6475870919124
Angular difference between Flight and Ground position is 1.232499 arcmin
Partial Coding Fraction: 0.328125 [ including projection effects ]
Duration
T90: 563.05999994278 +/- 37.8222135391303
Measured from: 72.608000099659
to: 635.668000042439 [s; relative to TRIGTIME]
T50: 193.567999958992 +/- 52.552021295166
Measured from: 154.64400011301
to: 348.212000072002 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 230.143999993801
to: 231.143999993801 [s; relative to TRIGTIME]
Total Fluence
Measured from: 46.5440000295639
to: 663.068000018597 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.600291 3.586576 2.041054 0.587966
0.205722 0.213371 0.186267 0.169372 [error]
Peak 0.039614 0.034297 0.025856 0.005305
0.009918 0.010613 0.009661 0.008735 [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 9.03e-07 1.44e-06 1.74e-06 4.10e-06 5.26e-06 8.19e-06 erg/cm2
Error 1.03e-07 1.04e-07 1.86e-07 9.10e-07 4.36e-07 1.08e-06 erg/cm2
Peak flux Power-law 3.84e-01 3.00e-01 1.57e-01 1.19e-01 8.95e-01 9.59e-01 ph/cm2/s
Error 1.52e-01 8.63e-02 7.86e-02 1.15e-01 2.55e-01 2.84e-01 ph/cm2/s
Fluence Cutoff-PL 8.70e-07 1.50e-06 1.75e-06 2.40e-06 5.10e-06 6.52e-06 erg/cm2
Error 1.17e-07 1.35e-07 1.96e-07 1.92e-06 5.07e-07 1.78e-06 erg/cm2
Peak flux Cutoff-PL 3.56e-01 3.21e-01 1.63e-01 6.34e-02 8.81e-01 9.06e-01 ph/cm2/s
Error 1.89e-01 1.11e-01 8.81e-02 1.31e-01 2.54e-01 2.20e-01 ph/cm2/s
Fluence Band 8.33e-07 1.55e-06 1.68e-06 3.24e-06 5.09e-06 7.35e-06 erg/cm2
Error 1.56e-07 -------- 2.02e-07 -------- 4.92e-07 -------- erg/cm2
Peak flux Band 3.69e-01 3.15e-01 1.61e-01 8.47e-02 8.96e-01 9.34e-01 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 1.730 0.130 - - 9.24e-04 7.28e-05 59.790 57
CPL 1.417 0.506 84.8 -27.3 1.37e-03 9.07e-04 58.660 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.933 0.580 - - 6.15e-03 2.36e-03 64.150 57
CPL 1.343 1.948 52.4 0.0 1.28e-02 0.00e+00 63.910 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: 382.144000 sec.
T50 in the 50-300 keV band: 192.192000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 616.524 46.544 663.068
T90 563.060 72.608 635.668
T50 193.568 154.644 348.212
Peak 1.000 230.144 231.144
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
122.6641 +22.2053 0.0179 31.2 116.3 4.7845 10.6 TRIG_00619182
------------------------------------------
Foreground time interval of the image:
46.544 298.301 (delta_t = 251.757 [sec])
Background time interval of the image:
-239.000 46.544 (delta_t = 285.544 [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 46.544 sec. to 663.068 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72984 ( -0.129245 0.131517 )
Norm@50keV : 9.24351E-04 ( -7.32245e-05 7.24736e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.79 using 59 PHA bins.
# Reduced chi-squared = 1.049 for 57 degrees of freedom
# Null hypothesis probability = 3.747112e-01
Photon flux (15-150 keV) in 616.5 sec: 0.124072 ( -0.00902944 0.00903783 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.26487e-06 ( -4.33332e-07 4.377e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 46.544 sec. to 663.068 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41650 ( -0.565053 0.446349 )
Epeak [keV] : 84.7725 ( -30.1296 -84.7754 )
Norm@50keV : 1.36880E-03 ( -0.000428303 0.00138616 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.66 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 56 degrees of freedom
# Null hypothesis probability = 3.783076e-01
Photon flux (15-150 keV) in 616.5 sec: 0.122286 ( -0.009466 0.009453 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.10308e-06 ( -5.06954e-07 5.0696e-07 ) ergs/cm2
Band function
Time interval is from 46.544 sec. to 663.068 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.78102 ( -11.678 -4.78102 )
beta : -1.83626 ( -0.16158 0.152429 )
Epeak [keV] : 24.0946 ( -4.47502 3.47539 )
Norm@50keV : 103.096 ( -7.34918 1156.97 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.82 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 55 degrees of freedom
# Null hypothesis probability = 4.070844e-01
Photon flux (15-150 keV) in 616.5 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.09363e-06 ( -5.08931e-06 -4.64859e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.8088 (-1.03801 1.16159)
R^2/D10^2 : 3.14196E-02 (-0.00927284 0.0128807)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 99.59 using 59 PHA bins.
# Reduced chi-squared = 1.747 for 57 degrees of freedom
# Null hypothesis probability = 4.140544e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.704e-07 7.090e-08
25- 50 1.761e-06 1.541e-07
50-150 1.461e-06 2.623e-07
15-150 3.793e-06 3.267e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 119.983 (-32.3589 50.5934)
Norm : 0.525413 (-0.0475938 0.059101)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.74 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 57 degrees of freedom
# Null hypothesis probability = 4.113318e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.437e-07 8.847e-08
25- 50 1.509e-06 1.436e-07
50-150 2.693e-06 9.987e-07
15-150 5.046e-06 1.069e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.51726 (-1.44447 1.44808)
R1^2/D10^2 : 0.123894 (-0.0538659 0.0716485)
kT2 [keV] : 29.1425 (-8.36582 20.3726)
R2^2/D10^2 : 8.28375E-04 (-0.0006622 0.00206647)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.26 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 55 degrees of freedom
# Null hypothesis probability = 3.912145e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.113e-07 1.755e-07
25- 50 1.583e-06 3.505e-07
50-150 2.800e-06 1.344e-06
15-150 5.195e-06 1.599e-06
Peak spectrum fit
Power-law model
Time interval is from 230.144 sec. to 231.144 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93265 ( -0.51293 0.646351 )
Norm@50keV : 6.14824E-03 ( -0.00246169 0.00225201 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.15 using 59 PHA bins.
# Reduced chi-squared = 1.125 for 57 degrees of freedom
# Null hypothesis probability = 2.402501e-01
Photon flux (15-150 keV) in 1 sec: 0.894820 ( -0.254763 0.254805 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.65541e-08 ( -2.0277e-08 2.14678e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 230.144 sec. to 231.144 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34263 ( -3.05415 0.842801 )
Epeak [keV] : 52.3852 ( )
Norm@50keV : 1.27761E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.91 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 56 degrees of freedom
# Null hypothesis probability = 2.184167e-01
Photon flux (15-150 keV) in 1 sec: 0.881436 ( -0.251449 0.257014 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.49859e-08 ( -1.96923e-08 2.20788e-08 ) ergs/cm2
Band function
Time interval is from 230.144 sec. to 231.144 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.44035 ( -6.02875 3.2538 )
beta : -10.0000 ( 10 5.32907e-15 )
Epeak [keV] : 51.5827 ( -39.9256 -51.7556 )
Norm@50keV : 1.15103E-02 ( -0.00712142 0.413985 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.92 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 55 degrees of freedom
# Null hypothesis probability = 1.918190e-01
Photon flux (15-150 keV) in 1 sec: 0.895943 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.46932e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.9491 (-3.58316 4.54586)
R^2/D10^2 : 0.169243 (-0.169238 0.363784)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.17 using 59 PHA bins.
# Reduced chi-squared = 1.161 for 57 degrees of freedom
# Null hypothesis probability = 1.898380e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.019e-09 3.796e-09
25- 50 2.064e-08 1.306e-08
50-150 2.183e-08 1.462e-08
15-150 4.849e-08 3.029e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 81.7935 (-47.5397 -81.7935)
Norm : 4.20393 (-1.37652 2.33952)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.95 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 57 degrees of freedom
# Null hypothesis probability = 2.457073e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.092e-08 6.745e-09
25- 50 1.808e-08 1.113e-08
50-150 2.590e-08 2.278e-08
15-150 5.490e-08 3.819e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.59207 (-1.84621 2.44457)
R1^2/D10^2 : 104.304 (-102.521 573.392)
kT2 [keV] : 15.3996 (-4.29804 7.14614)
R2^2/D10^2 : 8.01050E-02 (-0.0609081 0.105274)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.44 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 55 degrees of freedom
# Null hypothesis probability = 2.858492e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.137e-08 6.170e-09
25- 50 1.674e-08 1.014e-08
50-150 2.630e-08 1.871e-08
15-150 5.441e-08 3.090e-08
Plot creation:
Fri Nov 21 14:18:06 EST 2014