batgrbproduct Analysis for Trigger=604232
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): Mon Jul 14 13:21:44 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger604232/GCN5_download_cron
======================================================================
Trigger: 00604232 Segment: 000
BAT Trigger Time: 426969837.376 [s; MET]
Trigger Stop: 426969837.888 [s; MET]
UTC: 2014-07-13T18:43:45.115400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 281.114083816983 Dec: 59.6247281361308 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.98
Image Trigger?: NO
Rate S/N Ratio: 31.6069612585582 [ if not an image trigger ]
Image S/N Ratio: 11.98
Flight Position: [ source = BAT ]
RA: 281.114083816983 Dec: 59.6247281361308 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 281.141310041517 Dec: 59.6227858044067 [deg; J2000]
{ 18h 44m 33.9s , +59d 37' 22.0" }
+/- 1.17753461047761 [arcmin] (estimated 90% radius based on SNR)
+/- 0.499434230265275 [arcmin] (formal 1-sigma fit error)
SNR: 24.0839328279941
Angular difference between Flight and Ground position is 0.834239 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 5.29599994421005 +/- 0.663267709277793
Measured from: 0.03600013256073
to: 5.33200007677078 [s; relative to TRIGTIME]
T50: 3.34399992227554 +/- 0.745267727881272
Measured from: 0.548000156879425
to: 3.89200007915497 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.107999980449677
to: 0.892000019550323 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.107999980449677
to: 6.67599999904633 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.228878 0.275820 0.136907 0.034210
0.016399 0.016979 0.014465 0.011656 [error]
Peak 0.058815 0.099730 0.066242 0.015409
0.006956 0.007579 0.006686 0.004920 [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 7.02e-08 1.05e-07 1.18e-07 2.50e-07 3.69e-07 5.43e-07 erg/cm2
Error 7.91e-09 7.80e-09 1.41e-08 6.07e-08 3.26e-08 7.46e-08 erg/cm2
Peak flux Power-law 6.13e-01 6.38e-01 4.69e-01 5.56e-01 1.93e+00 2.28e+00 ph/cm2/s
Error 9.28e-02 6.05e-02 5.40e-02 1.30e-01 1.75e-01 2.11e-01 ph/cm2/s
Fluence Cutoff-PL 6.99e-08 1.06e-07 1.18e-07 2.24e-07 3.66e-07 5.14e-07 erg/cm2
Error 8.30e-09 9.32e-09 1.44e-08 9.94e-08 3.67e-08 1.22e-07 erg/cm2
Peak flux Cutoff-PL 5.92e-01 6.55e-01 4.78e-01 4.12e-01 1.92e+00 2.14e+00 ph/cm2/s
Error 1.04e-01 7.29e-02 5.85e-02 1.75e-01 1.77e-01 3.00e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 5.45e-01 7.10e-01 4.60e-01 4.60e-01 1.90e+00 2.17e+00 ph/cm2/s
Error 1.17e-01 -------- 5.71e-02 -------- 1.77e-01 2.25e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.836 0.138 - - 5.91e-03 5.14e-04 81.360 57
CPL 1.780 0.495 166.1 0.0 6.36e-03 0.00e+00 81.320 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.443 0.153 - - 1.57e-02 1.45e-03 61.150 57
CPL 1.210 0.461 164.7 0.0 2.08e-02 1.45e-02 60.620 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: 1.920000 sec.
T50 in the 50-300 keV band: 0.960000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 6.784 -0.108 6.676
T90 5.296 0.036 5.332
T50 3.344 0.548 3.892
Peak 1.000 -0.108 0.892
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
281.1413 +59.6228 0.0080 19.3 -6.4 0.7237 24.1 TRIG_00604232
------------------------------------------
Foreground time interval of the image:
-0.108 6.676 (delta_t = 6.784 [sec])
Background time interval of the image:
-232.875 -18.636 (delta_t = 214.239 [sec])
-16.376 -0.108 (delta_t = 16.268 [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 -0.108 sec. to 6.676 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83638 ( -0.136594 0.139913 )
Norm@50keV : 5.90738E-03 ( -0.000517967 0.000510326 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.36 using 59 PHA bins.
# Reduced chi-squared = 1.427 for 57 degrees of freedom
# Null hypothesis probability = 1.877681e-02
Photon flux (15-150 keV) in 6.784 sec: 0.825789 ( -0.0617701 0.0617943 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.68572e-07 ( -3.23712e-08 3.27844e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.108 sec. to 6.676 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78034 ( -0.528422 0.461023 )
Epeak [keV] : 166.111 ( )
Norm@50keV : 6.36062E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.32 using 59 PHA bins.
# Reduced chi-squared = 1.452 for 56 degrees of freedom
# Null hypothesis probability = 1.515852e-02
Photon flux (15-150 keV) in 6.784 sec: 0.823875 ( -0.032001 0.062985 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.66406e-07 ( -3.88459e-08 3.44831e-08 ) ergs/cm2
Band function
Time interval is from -0.108 sec. to 6.676 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93396 ( -5.3086 -4.93396 )
beta : -2.05181 ( -0.236423 0.18232 )
Epeak [keV] : 25.0473 ( -3.63891 2.7082 )
Norm@50keV : 763.761 ( -56.2225 1575.45 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.95 using 59 PHA bins.
# Reduced chi-squared = 1.345 for 55 degrees of freedom
# Null hypothesis probability = 4.500420e-02
Photon flux (15-150 keV) in 6.784 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] : 9.61616 ( )
R^2/D10^2 : 0.441347 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 125.80 using 59 PHA bins.
# Reduced chi-squared = 2.2070 for 57 degrees of freedom
# Null hypothesis probability = 4.251750e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.557e-08 6.682e-09
25- 50 1.306e-07 1.143e-08
50-150 6.079e-08 1.286e-08
15-150 2.469e-07 2.371e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 90.4761 (-22.5267 36.6718)
Norm : 3.72454 (-0.407159 0.482709)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.45 using 59 PHA bins.
# Reduced chi-squared = 1.464 for 57 degrees of freedom
# Null hypothesis probability = 1.277481e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.594e-08 7.964e-09
25- 50 1.117e-07 9.701e-09
50-150 1.706e-07 5.895e-08
15-150 3.482e-07 6.506e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.98843 (-0.822448 0.882718)
R1^2/D10^2 : 1.23787 (-0.437754 0.722012)
kT2 [keV] : 35.2965 (-9.61956 21.5099)
R2^2/D10^2 : 2.94163E-03 (-0.00212232 0.00522439)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.86 using 59 PHA bins.
# Reduced chi-squared = 1.234 for 55 degrees of freedom
# Null hypothesis probability = 1.142647e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.928e-08 1.261e-08
25- 50 1.127e-07 1.927e-08
50-150 2.010e-07 9.899e-08
15-150 3.830e-07 1.174e-07
Peak spectrum fit
Power-law model
Time interval is from -0.108 sec. to 0.892 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44261 ( -0.152231 0.153014 )
Norm@50keV : 1.57286E-02 ( -0.00145076 0.00144325 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.15 using 59 PHA bins.
# Reduced chi-squared = 1.073 for 57 degrees of freedom
# Null hypothesis probability = 3.293478e-01
Photon flux (15-150 keV) in 1 sec: 1.93480 ( -0.174481 0.174579 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.50717e-07 ( -1.54149e-08 1.55629e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.108 sec. to 0.892 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21042 ( -0.605469 0.316692 )
Epeak [keV] : 164.673 ( -164.681 -164.681 )
Norm@50keV : 2.08323E-02 ( -0.00703009 0.0218723 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.62 using 59 PHA bins.
# Reduced chi-squared = 1.082 for 56 degrees of freedom
# Null hypothesis probability = 3.129407e-01
Photon flux (15-150 keV) in 1 sec: 1.91925 ( -0.17544 0.17807 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.47815e-07 ( -1.7156e-08 1.6868e-08 ) ergs/cm2
Band function
Time interval is from -0.108 sec. to 0.892 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.48499 ( -5.4468 -4.48499 )
beta : -1.62530 ( -0.211487 0.195467 )
Epeak [keV] : 28.4872 ( -4.99419 18.4249 )
Norm@50keV : 329.673 ( -29.174 3911.01 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.73 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 55 degrees of freedom
# Null hypothesis probability = 4.102019e-01
Photon flux (15-150 keV) in 1 sec: 1.90449 ( 5.09551 -0.17545 ) 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] : 13.8292 (-1.6926 2.05391)
R^2/D10^2 : 0.291883 (-0.1118 0.170926)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.52 using 59 PHA bins.
# Reduced chi-squared = 1.623 for 57 degrees of freedom
# Null hypothesis probability = 2.035721e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.180e-08 2.159e-09
25- 50 4.337e-08 5.185e-09
50-150 5.426e-08 1.064e-08
15-150 1.094e-07 1.254e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 7.92359 (-0.709359 0.709359)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.72 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 57 degrees of freedom
# Null hypothesis probability = 3.111594e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.980e-08 2.665e-09
25- 50 3.809e-08 1.018e-08
50-150 8.353e-08 3.786e-08
15-150 1.414e-07 5.081e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.18590 (-1.48805 1.65093)
R1^2/D10^2 : 1.34129 (-0.602627 1.22517)
kT2 [keV] : 36.3975 (-10.6235 31.0252)
R2^2/D10^2 : 8.35857E-03 (-0.00672609 0.0176359)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.69 using 59 PHA bins.
# Reduced chi-squared = 0.9943 for 55 degrees of freedom
# Null hypothesis probability = 4.865927e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.805e-08 5.723e-09
25- 50 4.020e-08 1.180e-08
50-150 9.410e-08 4.543e-08
15-150 1.524e-07 6.114e-08
Plot creation:
Mon Jul 14 13:25:31 EDT 2014