batgrbproduct Analysis for Trigger=597722
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): Thu May 1 19:29:21 EDT 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger597722/GCN5_download_cron
======================================================================
Trigger: 00597722 Segment: 000
BAT Trigger Time: 420582828.48 [s; MET]
Trigger Stop: 420582828.992 [s; MET]
UTC: 2014-04-30T20:33:36.527160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 102.929387590687 Dec: 23.0094966592596 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.01
Image Trigger?: NO
Rate S/N Ratio: 15.7162336455017 [ if not an image trigger ]
Image S/N Ratio: 9.01
Flight Position: [ source = BAT ]
RA: 102.929387590687 Dec: 23.0094966592596 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 102.941866970577 Dec: 23.0328017957096 [deg; J2000]
{ 06h 51m 46.0s , +23d 01' 58.1" }
+/- 0.978953735630722 [arcmin] (estimated 90% radius based on SNR)
+/- 0.3641976368621 [arcmin] (formal 1-sigma fit error)
SNR: 31.3556120808807
Angular difference between Flight and Ground position is 1.558900 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 173.591999948025 +/- 3.69174647045451
Measured from: 0.436000108718872
to: 174.028000056744 [s; relative to TRIGTIME]
T50: 151.691999912262 +/- 8.98448439843169
Measured from: 2.35600012540817
to: 154.04800003767 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.43999999761581
to: 3.43999999761581 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.304000020027161
to: 177.575999975204 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.853861 0.878482 0.439978 0.163896
0.076104 0.080199 0.075215 0.079741 [error]
Peak 0.077871 0.139879 0.080251 0.026769
0.006836 0.007722 0.007102 0.006446 [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 2.50e-07 3.40e-07 3.41e-07 6.19e-07 1.13e-06 1.55e-06 erg/cm2
Error 3.70e-08 3.63e-08 7.14e-08 2.59e-07 1.58e-07 3.36e-07 erg/cm2
Peak flux Power-law 7.65e-01 8.20e-01 6.23e-01 7.71e-01 2.50e+00 2.98e+00 ph/cm2/s
Error 8.92e-02 5.99e-02 5.71e-02 1.43e-01 1.74e-01 2.22e-01 ph/cm2/s
Fluence Cutoff-PL 2.52e-07 3.40e-07 3.37e-07 6.01e-07 1.12e-06 1.53e-06 erg/cm2
Error 3.60e-08 3.66e-08 7.10e-08 3.96e-07 1.58e-07 4.02e-07 erg/cm2
Peak flux Cutoff-PL 7.07e-01 8.77e-01 6.38e-01 2.44e+00 2.58e+00 0.00e+00 ph/cm2/s
Error 1.02e-01 7.94e-02 6.29e-02 1.83e-01 3.00e-01 0.00e+00 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 1.996 0.225 - - 6.90e-04 1.02e-04 55.060 57
CPL 2.093 0.000 41.5 0.0 5.88e-04 0.00e+00 54.490 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.396 0.120 - - 2.05e-02 1.49e-03 65.280 57
CPL 0.794 0.558 92.4 129.2 4.34e-02 3.42e-02 61.200 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: 2.944000 sec.
T50 in the 50-300 keV band: 1.600000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 177.880 -0.304 177.576
T90 173.592 0.436 174.028
T50 151.692 2.356 154.048
Peak 1.000 2.440 3.440
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
102.9419 +23.0328 0.0061 9.1 19.7 1.2788 31.4 TRIG_00597722
------------------------------------------
Foreground time interval of the image:
-0.304 8.221 (delta_t = 8.525 [sec])
Background time interval of the image:
-179.480 -0.304 (delta_t = 179.176 [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 -0.304 sec. to 177.576 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99647 ( -0.218318 0.231433 )
Norm@50keV : 6.89923E-04 ( -0.000103126 0.000100217 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.06 using 59 PHA bins.
# Reduced chi-squared = 0.9659 for 57 degrees of freedom
# Null hypothesis probability = 5.482404e-01
Photon flux (15-150 keV) in 177.9 sec: 0.103321 ( -0.0106441 0.0106447 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13165e-06 ( -1.54524e-07 1.60732e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.304 sec. to 177.576 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.09290 ( )
Epeak [keV] : 41.4759 ( )
Norm@50keV : 5.88368E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.49 using 59 PHA bins.
# Reduced chi-squared = 0.9730 for 56 degrees of freedom
# Null hypothesis probability = 5.323063e-01
Photon flux (15-150 keV) in 177.9 sec: 0.103244 ( -0.0106357 0.01064 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1213e-06 ( -1.5106e-07 1.65728e-07 ) ergs/cm2
Band function
Time interval is from -0.304 sec. to 177.576 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.45490 ( 1.45627 1.45627 )
beta : -2.01245 ( 2.01092 0.231523 )
Epeak [keV] : 22.3961 ( -22.0721 157.215 )
Norm@50keV : 1.85781E-03 ( -0.00189344 228494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.03 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 55 degrees of freedom
# Null hypothesis probability = 4.735578e-01
Photon flux (15-150 keV) in 177.9 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] : 8.55149 (-1.09996 1.28633)
R^2/D10^2 : 8.37578E-02 (-0.0350682 0.060118)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.35 using 59 PHA bins.
# Reduced chi-squared = 1.410 for 57 degrees of freedom
# Null hypothesis probability = 2.251647e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.061e-07 3.691e-08
25- 50 4.037e-07 6.218e-08
50-150 1.314e-07 4.375e-08
15-150 7.412e-07 1.033e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.3338 (-20.3695 38.6273)
Norm : 0.521068 (-0.0912674 0.116932)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.06 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 57 degrees of freedom
# Null hypothesis probability = 4.001792e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.349e-07 3.273e-08
25- 50 3.633e-07 4.474e-08
50-150 4.321e-07 1.311e-07
15-150 1.030e-06 1.708e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.53513 (-1.5705 1.4342)
R1^2/D10^2 : 0.211501 (-0.102452 0.363972)
kT2 [keV] : 51.1892 (-31.9175 -52.3367)
R2^2/D10^2 : 1.48528E-04 (-0.000120305 0.00210811)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.61 using 59 PHA bins.
# Reduced chi-squared = 0.9929 for 55 degrees of freedom
# Null hypothesis probability = 4.895486e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.464e-07 5.721e-08
25- 50 3.394e-07 9.308e-08
50-150 7.107e-07 3.919e-07
15-150 1.296e-06 4.939e-07
Peak spectrum fit
Power-law model
Time interval is from 2.440 sec. to 3.440 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39593 ( -0.119354 0.119882 )
Norm@50keV : 2.05496E-02 ( -0.00149211 0.00148516 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.28 using 59 PHA bins.
# Reduced chi-squared = 1.145 for 57 degrees of freedom
# Null hypothesis probability = 2.110477e-01
Photon flux (15-150 keV) in 1 sec: 2.50026 ( -0.174416 0.17445 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9873e-07 ( -1.63575e-08 1.65407e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.440 sec. to 3.440 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.794140 ( -0.603717 0.513208 )
Epeak [keV] : 92.4374 ( -26.4137 231.956 )
Norm@50keV : 4.34418E-02 ( -0.0201501 0.0483269 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.20 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 56 degrees of freedom
# Null hypothesis probability = 2.947273e-01
Photon flux (15-150 keV) in 1 sec: 2.43619 ( -0.1838 0.18309 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 2.440 sec. to 3.440 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.06949 ( -2.58864 -2.09791 )
beta : -1.75957 ( -0.369635 0.224386 )
Epeak [keV] : 43.3562 ( -12.4334 23.8984 )
Norm@50keV : 0.713352 ( -0.730644 245.996 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.42 using 59 PHA bins.
# Reduced chi-squared = 0.9894 for 55 degrees of freedom
# Null hypothesis probability = 4.968400e-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] : 13.5414 (-1.11719 1.2656)
R^2/D10^2 : 0.414123 (-0.111406 0.146322)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.69 using 59 PHA bins.
# Reduced chi-squared = 1.521 for 57 degrees of freedom
# Null hypothesis probability = 6.820972e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.608e-08 1.990e-09
25- 50 5.783e-08 5.325e-09
50-150 6.860e-08 1.114e-08
15-150 1.425e-07 1.290e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 10.2016 (-0.711999 0.712)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.61 using 59 PHA bins.
# Reduced chi-squared = 1.151 for 57 degrees of freedom
# Null hypothesis probability = 2.030537e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.548e-08 2.150e-09
25- 50 4.902e-08 4.400e-09
50-150 1.075e-07 3.383e-08
15-150 1.820e-07 3.935e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.0016 (-1.50708 1.43872)
R1^2/D10^2 : 0.956105 (-0.316067 0.550868)
kT2 [keV] : 55.4993 (-27.1767 -58.5367)
R2^2/D10^2 : 3.07522E-03 (-0.00230687 0.0129253)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.95 using 59 PHA bins.
# Reduced chi-squared = 0.9265 for 55 degrees of freedom
# Null hypothesis probability = 6.298847e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.043e-08 3.525e-09
25- 50 5.548e-08 1.191e-08
50-150 1.200e-07 5.409e-08
15-150 1.959e-07 6.696e-08
Plot creation:
Thu May 1 20:06:12 EDT 2014