batgrbproduct Analysis for Trigger=602884
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 Jun 30 08:38:45 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger602884/GCN5_download_cron
======================================================================
Trigger: 00602884 Segment: 000
BAT Trigger Time: 425744262.528 [s; MET]
Trigger Stop: 425744263.552 [s; MET]
UTC: 2014-06-29T14:17:30.326760 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 248.981975533517 Dec: 41.890321954013 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.95
Image Trigger?: NO
Rate S/N Ratio: 10.9087121146357 [ if not an image trigger ]
Image S/N Ratio: 7.95
Flight Position: [ source = BAT ]
RA: 248.981975533517 Dec: 41.890321954013 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 249.01550829439 Dec: 41.897432408696 [deg; J2000]
{ 16h 36m 03.7s , +41d 53' 50.8" }
+/- 1.74355121767275 [arcmin] (estimated 90% radius based on SNR)
+/- 1.08123118433294 [arcmin] (formal 1-sigma fit error)
SNR: 13.7471177343997
Angular difference between Flight and Ground position is 1.557252 arcmin
Partial Coding Fraction: 0.4179688 [ including projection effects ]
Duration
T90: 40.5319999456406 +/- 11.5414884203924
Measured from: -4.35199987888336
to: 36.1800000667572 [s; relative to TRIGTIME]
T50: 9.98399996757507 +/- 2.78480233190823
Measured from: 5.8280001282692
to: 15.8120000958443 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 12.1520000100136
to: 13.1520000100136 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.61199998855591
to: 54.944000005722 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.169470 1.513037 1.006468 0.127107
0.075610 0.075667 0.067143 0.060448 [error]
Peak 0.117495 0.177845 0.186231 0.046751
0.013001 0.014266 0.013646 0.010271 [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 4.59e-07 6.76e-07 7.42e-07 1.53e-06 2.34e-06 3.41e-06 erg/cm2
Error 4.42e-08 4.06e-08 6.56e-08 2.81e-07 1.54e-07 3.40e-07 erg/cm2
Peak flux Power-law 1.32e+00 1.44e+00 1.12e+00 1.44e+00 4.43e+00 5.33e+00 ph/cm2/s
Error 1.96e-01 1.34e-01 1.05e-01 2.72e-01 3.75e-01 4.36e-01 ph/cm2/s
Fluence Cutoff-PL 4.26e-07 7.09e-07 7.54e-07 7.63e-07 2.26e-06 2.65e-06 erg/cm2
Error 5.22e-08 5.03e-08 7.08e-08 4.78e-07 1.70e-07 5.07e-07 erg/cm2
Peak flux Cutoff-PL 1.12e+00 1.51e+00 1.22e+00 7.88e-01 4.31e+00 4.64e+00 ph/cm2/s
Error 2.44e-01 1.53e-01 1.33e-01 -------- 3.87e-01 5.53e-01 ph/cm2/s
Fluence Band 4.21e-07 7.08e-07 7.54e-07 7.71e-07 2.25e-06 2.66e-06 erg/cm2
Error 5.03e-08 -------- 6.74e-08 -------- -------- -------- erg/cm2
Peak flux Band 1.14e+00 1.50e+00 1.22e+00 8.58e-01 4.33e+00 4.72e+00 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 1.864 0.109 - - 4.08e-03 2.66e-04 46.450 57
CPL 1.383 0.442 60.9 45.5 7.28e-03 4.06e-03 42.540 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.361 0.133 - - 3.67e-02 2.96e-03 70.040 57
CPL 0.655 0.604 105.9 100.7 7.78e-02 5.41e-02 65.290 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: 20.160000 sec.
T50 in the 50-300 keV band: 9.024000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 62.556 -7.612 54.944
T90 40.532 -4.352 36.180
T50 9.984 5.828 15.812
Peak 1.000 12.152 13.152
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
249.0155 +41.8974 0.0140 44.1 1.3 1.2755 13.7 TRIG_00602884
------------------------------------------
Foreground time interval of the image:
-7.612 10.273 (delta_t = 17.885 [sec])
Background time interval of the image:
-239.528 -7.612 (delta_t = 231.916 [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 -7.612 sec. to 54.944 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86433 ( -0.108286 0.110487 )
Norm@50keV : 4.07619E-03 ( -0.000267153 0.000264873 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.45 using 59 PHA bins.
# Reduced chi-squared = 0.8149 for 57 degrees of freedom
# Null hypothesis probability = 8.396995e-01
Photon flux (15-150 keV) in 62.56 sec: 0.576315 ( -0.0356195 0.0357005 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.34439e-06 ( -1.53247e-07 1.54152e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.612 sec. to 54.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38269 ( -0.463696 0.420012 )
Epeak [keV] : 60.8855 ( -12.7338 78.3473 )
Norm@50keV : 7.27953E-03 ( -0.00283046 0.00529823 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.54 using 59 PHA bins.
# Reduced chi-squared = 0.7597 for 56 degrees of freedom
# Null hypothesis probability = 9.076032e-01
Photon flux (15-150 keV) in 62.56 sec: 0.561418 ( -0.037752 0.037804 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25907e-06 ( -1.6995e-07 1.70883e-07 ) ergs/cm2
Band function
Time interval is from -7.612 sec. to 54.944 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.38268 ( -0.307322 0.571001 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 60.8741 ( -12.7339 78.0476 )
Norm@50keV : 7.27856E-03 ( -0.00282813 0.0053039 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.54 using 59 PHA bins.
# Reduced chi-squared = 0.7735 for 55 degrees of freedom
# Null hypothesis probability = 8.900006e-01
Photon flux (15-150 keV) in 62.56 sec: 0.563819 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25499e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.3288 (-0.934427 1.00425)
R^2/D10^2 : 0.120361 (-0.0306113 0.0414659)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 106.26 using 59 PHA bins.
# Reduced chi-squared = 1.8641 for 57 degrees of freedom
# Null hypothesis probability = 8.232067e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.425e-07 2.753e-08
25- 50 7.875e-07 5.662e-08
50-150 7.326e-07 9.415e-08
15-150 1.763e-06 1.239e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 93.4382 (-17.6896 25.0596)
Norm : 2.56365 (-0.225582 0.254061)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.66 using 59 PHA bins.
# Reduced chi-squared = 0.7485 for 57 degrees of freedom
# Null hypothesis probability = 9.209502e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.189e-07 4.501e-08
25- 50 7.142e-07 4.442e-08
50-150 1.113e-06 3.384e-07
15-150 2.246e-06 3.619e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.83891 (-0.968191 1.09339)
R1^2/D10^2 : 1.31059 (-0.613172 1.35841)
kT2 [keV] : 20.2359 (-2.82017 4.02667)
R2^2/D10^2 : 1.45084E-02 (-0.00750543 0.0122703)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.69 using 59 PHA bins.
# Reduced chi-squared = 0.7216 for 55 degrees of freedom
# Null hypothesis probability = 9.403209e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.281e-07 1.008e-07
25- 50 6.931e-07 1.295e-07
50-150 1.116e-06 3.298e-07
15-150 2.237e-06 3.894e-07
Peak spectrum fit
Power-law model
Time interval is from 12.152 sec. to 13.152 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36062 ( -0.132921 0.133037 )
Norm@50keV : 3.66517E-02 ( -0.00296367 0.00296346 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.04 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 57 degrees of freedom
# Null hypothesis probability = 1.150103e-01
Photon flux (15-150 keV) in 1 sec: 4.42523 ( -0.374711 0.375582 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.57124e-07 ( -3.09205e-08 3.10115e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 12.152 sec. to 13.152 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.655041 ( -0.647374 0.560552 )
Epeak [keV] : 105.859 ( -27.1302 174.263 )
Norm@50keV : 7.78290E-02 ( -0.0344304 0.0738385 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.29 using 59 PHA bins.
# Reduced chi-squared = 1.166 for 56 degrees of freedom
# Null hypothesis probability = 1.852333e-01
Photon flux (15-150 keV) in 1 sec: 4.30781 ( -0.38634 0.38703 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4867e-07 ( -3.2487e-08 3.2307e-08 ) ergs/cm2
Band function
Time interval is from 12.152 sec. to 13.152 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.655373 ( -0.488154 0.609366 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 105.862 ( -19.878 173.879 )
Norm@50keV : 7.78032E-02 ( -0.0343698 0.0739157 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.29 using 59 PHA bins.
# Reduced chi-squared = 1.187 for 55 degrees of freedom
# Null hypothesis probability = 1.614725e-01
Photon flux (15-150 keV) in 1 sec: 4.32867 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.29861e-07 ( -3.29854e-07 -3.1699e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.7328 (-1.62694 1.83658)
R^2/D10^2 : 0.301992 (-0.0874673 0.119222)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.75 using 59 PHA bins.
# Reduced chi-squared = 1.504 for 57 degrees of freedom
# Null hypothesis probability = 8.202541e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.910e-08 2.895e-09
25- 50 8.735e-08 1.030e-08
50-150 1.986e-07 2.760e-08
15-150 3.051e-07 3.155e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 18.5650 (-1.50793 1.50777)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.89 using 59 PHA bins.
# Reduced chi-squared = 1.296 for 57 degrees of freedom
# Null hypothesis probability = 6.559847e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.624e-08 4.675e-09
25- 50 8.895e-08 1.126e-08
50-150 1.951e-07 7.096e-08
15-150 3.303e-07 1.011e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.91392 (-4.82188 4.51931)
R1^2/D10^2 : 2.22927 (-1.45713 5.0888)
kT2 [keV] : 25.5262 (-6.87564 19.858)
R2^2/D10^2 : 6.96464E-02 (-0.0578628 0.141707)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.31 using 59 PHA bins.
# Reduced chi-squared = 1.224 for 55 degrees of freedom
# Null hypothesis probability = 1.233606e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.284e-08 1.608e-08
25- 50 8.771e-08 3.582e-08
50-150 2.261e-07 1.082e-07
15-150 3.467e-07 1.265e-07
Plot creation:
Mon Jun 30 08:42:34 EDT 2014