batgrbproduct Analysis for Trigger=602080
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 Jun 20 06:40:18 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger602080/batgroup_hand_proc
======================================================================
Trigger: 00602080 Segment: 000
BAT Trigger Time: 424870728 [s; MET]
Trigger Stop: 424870792 [s; MET]
UTC: 2014-06-19T11:38:35.841160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 27.092354772269 Dec: -39.2614499007029 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.08
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.08
Flight Position: [ source = BAT ]
RA: 27.092354772269 Dec: -39.2614499007029 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 27.0964584324666 Dec: -39.2491897747799 [deg; J2000]
{ 01h 48m 23.2s , -39d 14' 57.1" }
+/- 1.8149863514358 [arcmin] (estimated 90% radius based on SNR)
+/- 1.03247349720738 [arcmin] (formal 1-sigma fit error)
SNR: 12.980735158329
Angular difference between Flight and Ground position is 0.759913 arcmin
Partial Coding Fraction: 0.4179688 [ including projection effects ]
Duration
T90: 233.923999965191 +/- 13.4331626985642
Measured from: 79.2639999985695
to: 313.18799996376 [s; relative to TRIGTIME]
T50: 66.447999894619 +/- 2.21971174181064
Measured from: 171.160000026226
to: 237.607999920845 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 219.519999980927
to: 220.519999980927 [s; relative to TRIGTIME]
Total Fluence
Measured from: 32.3080000281334
to: 340.375999987125 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 10.771466 13.214244 9.161783 2.079045
0.127976 0.135756 0.120121 0.113933 [error]
Peak 0.144105 0.194402 0.162439 0.036943
0.008011 0.008880 0.008099 0.006256 [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 3.68e-06 5.93e-06 7.23e-06 1.73e-05 2.18e-05 3.42e-05 erg/cm2
Error 1.35e-07 1.24e-07 1.47e-07 8.31e-07 3.73e-07 8.85e-07 erg/cm2
Peak flux Power-law 1.48e+00 1.51e+00 1.08e+00 1.24e+00 4.56e+00 5.32e+00 ph/cm2/s
Error 1.36e-01 8.43e-02 6.79e-02 1.61e-01 2.39e-01 2.71e-01 ph/cm2/s
Fluence Cutoff-PL 3.42e-06 5.99e-06 7.39e-06 1.27e-05 2.14e-05 2.95e-05 erg/cm2
Error 1.86e-07 1.30e-07 1.70e-07 2.08e-06 4.29e-07 2.14e-06 erg/cm2
Peak flux Cutoff-PL 1.32e+00 1.57e+00 1.14e+00 7.56e-01 4.45e+00 4.79e+00 ph/cm2/s
Error 1.74e-01 9.63e-02 8.13e-02 2.80e-01 2.53e-01 3.88e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.714 0.034 - - 7.65e-03 1.30e-04 64.340 57
CPL 1.451 0.144 117.8 46.2 9.98e-03 1.44e-03 54.230 56
The chi2 of BB fit is Chi-Squared Chi-Squared 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 1.479 0.089 - - 3.68e-02 1.88e-03 55.950 57
CPL 0.967 0.398 107.4 86.2 6.46e-02 2.91e-02 50.600 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: 240.640000 sec.
T50 in the 50-300 keV band: 62.272000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 308.068 32.308 340.376
T90 233.924 79.264 313.188
T50 66.448 171.160 237.608
Peak 1.000 219.520 220.520
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
27.0965 -39.2492 0.0148 34.1477 37.3381 1.4362429 12.981 TRIG_00602080
Foreground time interval of the image:
32.308 72.701 (delta_t = 40.393 [sec])
Background time interval of the image:
-399.899 -380.879 (delta_t = 19.021 [sec])
-239.000 32.308 (delta_t = 271.308 [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 32.308 sec. to 340.376 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71401 ( -0.0336904 0.0336962 )
Norm@50keV : 7.64540E-03 ( -0.000130408 0.000130402 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.34 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 57 degrees of freedom
# Null hypothesis probability = 2.351967e-01
Photon flux (15-150 keV) in 308.1 sec: 1.02041 ( -0.0216908 0.0218027 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.17864e-05 ( -3.72761e-07 3.7277e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 32.308 sec. to 340.376 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45091 ( -0.146574 0.142266 )
Epeak [keV] : 117.756 ( -22.8305 69.4786 )
Norm@50keV : 9.98461E-03 ( -0.00131341 0.00156268 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.23 using 59 PHA bins.
# Reduced chi-squared = 0.9684 for 56 degrees of freedom
# Null hypothesis probability = 5.420495e-01
Photon flux (15-150 keV) in 308.1 sec: 0.993145 ( -0.025481 0.025725 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.13968e-05 ( -4.29183e-07 4.27951e-07 ) ergs/cm2
Band function
Time interval is from 32.308 sec. to 340.376 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.15606 ( -0.39924 0.509215 )
beta : -1.82187 ( 1.82188 0.070851 )
Epeak [keV] : 69.0838 ( -19.8007 92.4199 )
Norm@50keV : 1.46957E-02 ( -0.00563721 0.0150928 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.23 using 59 PHA bins.
# Reduced chi-squared = 0.9678 for 55 degrees of freedom
# Null hypothesis probability = 5.426708e-01
Photon flux (15-150 keV) in 308.1 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] : 15.8561 ( )
R^2/D10^2 : 8.44058E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 702.03 using 59 PHA bins.
# Reduced chi-squared = 12.316 for 57 degrees of freedom
# Null hypothesis probability = 6.753453e-112
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.355e-06 4.976e-08
25- 50 5.655e-06 1.402e-07
50-150 9.904e-06 2.942e-07
15-150 1.691e-05 3.127e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 153.684 ( )
Norm : 4.07214 (-0.0904333 0.116041)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.82 using 59 PHA bins.
# Reduced chi-squared = 1.014 for 57 degrees of freedom
# Null hypothesis probability = 4.449054e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.196e-06 1.439e-07
25- 50 5.955e-06 2.388e-07
50-150 1.193e-05 2.288e-06
15-150 2.108e-05 2.422e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.97144 (-0.525093 0.536673)
R1^2/D10^2 : 0.684294 (-0.135338 0.183576)
kT2 [keV] : 27.5028 (-1.87569 2.27252)
R2^2/D10^2 : 8.67187E-03 (-0.00224171 0.0027211)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.44 using 59 PHA bins.
# Reduced chi-squared = 1.299 for 55 degrees of freedom
# Null hypothesis probability = 6.729341e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.749e-06 1.721e-07
25- 50 6.181e-06 1.926e-07
50-150 1.197e-05 5.623e-07
15-150 2.090e-05 6.023e-07
Peak spectrum fit
Power-law model
Time interval is from 219.520 sec. to 220.520 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47895 ( -0.0882223 0.0889351 )
Norm@50keV : 3.67617E-02 ( -0.00187739 0.00187491 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.95 using 59 PHA bins.
# Reduced chi-squared = 0.9817 for 57 degrees of freedom
# Null hypothesis probability = 5.143253e-01
Photon flux (15-150 keV) in 1 sec: 4.56382 ( -0.239178 0.239558 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.49973e-07 ( -1.94176e-08 1.94847e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 219.520 sec. to 220.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.966950 ( -0.415152 0.381091 )
Epeak [keV] : 107.407 ( -26.3842 145.957 )
Norm@50keV : 6.45789E-02 ( -0.0217214 0.0363795 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.60 using 59 PHA bins.
# Reduced chi-squared = 0.9036 for 56 degrees of freedom
# Null hypothesis probability = 6.787382e-01
Photon flux (15-150 keV) in 1 sec: 4.44755 ( -0.25299 0.25357 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.40262e-07 ( -2.1052e-08 2.097e-08 ) ergs/cm2
Band function
Time interval is from 219.520 sec. to 220.520 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.944805 ( -0.385778 0.595935 )
beta : -2.08745 ( 2.08782 0.529862 )
Epeak [keV] : 104.100 ( -39.2593 141.926 )
Norm@50keV : 6.64007E-02 ( -0.0230781 0.0754439 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.56 using 59 PHA bins.
# Reduced chi-squared = 0.9193 for 55 degrees of freedom
# Null hypothesis probability = 6.447846e-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] : 16.0384 (-0.93664 1.00724)
R^2/D10^2 : 0.418324 (-0.0806079 0.0983154)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 110.96 using 59 PHA bins.
# Reduced chi-squared = 1.9467 for 57 degrees of freedom
# Null hypothesis probability = 2.477471e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.224e-08 2.135e-09
25- 50 9.377e-08 5.555e-09
50-150 1.687e-07 1.610e-08
15-150 2.847e-07 1.725e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 18.7139 (-0.948422 0.948438)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.70 using 59 PHA bins.
# Reduced chi-squared = 0.9597 for 57 degrees of freedom
# Null hypothesis probability = 5.617422e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.679e-08 2.705e-09
25- 50 9.000e-08 5.170e-09
50-150 1.974e-07 1.245e-08
15-150 3.342e-07 2.065e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.88077 (-1.49851 3.0539)
R1^2/D10^2 : 14.1394 (-11.2797 65.2669)
kT2 [keV] : 20.4416 (-2.92437 5.40423)
R2^2/D10^2 : 0.158850 (-0.0963074 0.0924104)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.00 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 55 degrees of freedom
# Null hypothesis probability = 4.369902e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.387e-08 1.727e-08
25- 50 8.327e-08 1.389e-08
50-150 1.998e-07 2.260e-08
15-150 3.269e-07 3.940e-08
Plot creation:
Fri Jun 20 06:49:21 EDT 2014