batgrbproduct Analysis for Trigger=595616
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): Sun Apr 13 10:37:47 EDT 2014
Host Name: bat1
Current Working Dir: /net/raid16/prebascript_archive/trigger595616/batgroup_hand_proc
======================================================================
Trigger: 00595616 Segment: 000
BAT Trigger Time: 419040592 [s; MET]
Trigger Stop: 419040656 [s; MET]
UTC: 2014-04-13T00:09:40.120580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 65.4492072468499 Dec: -51.2050253508241 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.49
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 12.49
Flight Position: [ source = BAT ]
RA: 65.4492072468499 Dec: -51.2050253508241 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 65.4391673118023 Dec: -51.187524258346 [deg; J2000]
{ 04h 21m 45.4s , -51d 11' 15.1" }
+/- 1.32332298241349 [arcmin] (estimated 90% radius based on SNR)
+/- 0.434829389885483 [arcmin] (formal 1-sigma fit error)
SNR: 20.3849671363623
Angular difference between Flight and Ground position is 1.115858 arcmin
Partial Coding Fraction: 0.1210938 [ including projection effects ]
Duration
T90: 139.632000029087 +/- 12.6205952171547
Measured from: -32.5040000081062
to: 107.128000020981 [s; relative to TRIGTIME]
T50: 61.5360000729561 +/- 6.14137444404972
Measured from: 20.4559999704361
to: 81.9920000433922 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 77.0519999861717
to: 78.0519999861717 [s; relative to TRIGTIME]
Total Fluence
Measured from: -52.0080000162125
to: 120.39200001955 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.534894 5.464799 4.262909 1.307091
0.215740 0.220961 0.199585 0.176106 [error]
Peak 0.068360 0.109307 0.084206 0.037900
0.017417 0.019884 0.017275 0.013968 [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 1.26e-06 2.33e-06 3.31e-06 9.92e-06 9.44e-06 1.68e-05 erg/cm2
Error 1.10e-07 1.21e-07 1.95e-07 1.29e-06 4.78e-07 1.42e-06 erg/cm2
Peak flux Power-law 7.44e-01 7.67e-01 5.58e-01 6.52e-01 2.32e+00 2.72e+00 ph/cm2/s
Error 2.57e-01 1.67e-01 1.33e-01 3.16e-01 4.74e-01 5.40e-01 ph/cm2/s
Fluence Cutoff-PL 1.17e-06 2.40e-06 3.41e-06 6.01e-06 9.23e-06 1.30e-05 erg/cm2
Error 1.37e-07 1.39e-07 2.20e-07 5.21e-07 2.09e-06 0.00e+00 erg/cm2
Peak flux Cutoff-PL 7.27e-01 7.79e-01 5.66e-01 5.53e-01 2.31e+00 2.62e+00 ph/cm2/s
Error 2.70e-01 1.91e-01 1.47e-01 5.02e-01 4.78e-01 6.40e-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 1.492 0.084 - - 5.77e-03 2.72e-04 75.910 57
CPL 1.117 0.350 125.1 255.8 8.71e-03 3.39e-03 72.270 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 1.459 0.333 - - 1.88e-02 3.73e-03 63.090 57
CPL 1.321 1.515 238.0 0.0 2.21e-02 4.85e-02 63.050 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: 148.096000 sec.
T50 in the 50-300 keV band: 56.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 172.400 -52.008 120.392
T90 139.632 -32.504 107.128
T50 61.536 20.456 81.992
Peak 1.000 77.052 78.052
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
65.4392 -51.1875 0.0094 40.7895 -81.0829 15.0664656 20.385 TRIG_00595616
Foreground time interval of the image:
-52.008 120.392 (delta_t = 172.400 [sec])
Background time interval of the image:
-239.000 -52.008 (delta_t = 186.992 [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 -52.008 sec. to 120.392 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49209 ( -0.0840404 0.0842296 )
Norm@50keV : 5.76748E-03 ( -0.00027193 0.000271783 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.91 using 59 PHA bins.
# Reduced chi-squared = 1.332 for 57 degrees of freedom
# Null hypothesis probability = 4.772131e-02
Photon flux (15-150 keV) in 172.4 sec: 0.718486 ( -0.0358432 0.0359358 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.44485e-06 ( -4.77074e-07 4.78431e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -52.008 sec. to 120.392 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11673 ( -0.363659 0.336429 )
Epeak [keV] : 125.084 ( -37.3209 474.271 )
Norm@50keV : 8.70938E-03 ( -0.00263386 0.00414198 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.27 using 59 PHA bins.
# Reduced chi-squared = 1.290 for 56 degrees of freedom
# Null hypothesis probability = 7.066763e-02
Photon flux (15-150 keV) in 172.4 sec: 0.703303 ( -0.038143 0.038222 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.22987e-06 ( -5.22096e-07 5.18958e-07 ) ergs/cm2
Band function
Time interval is from -52.008 sec. to 120.392 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.12034 ( -0.735359 2.2181 )
beta : -2.14666 ( 2.0419 0.560295 )
Epeak [keV] : 126.483 ( -94.7678 394.97 )
Norm@50keV : 8.66119E-03 ( -0.00224974 0.0972982 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.27 using 59 PHA bins.
# Reduced chi-squared = 1.314 for 55 degrees of freedom
# Null hypothesis probability = 5.911071e-02
Photon flux (15-150 keV) in 172.4 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] : 16.1378 ( )
R^2/D10^2 : 6.27001E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 157.40 using 59 PHA bins.
# Reduced chi-squared = 2.7615 for 57 degrees of freedom
# Null hypothesis probability = 2.418875e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.809e-07 5.344e-08
25- 50 2.463e-06 1.612e-07
50-150 4.497e-06 3.888e-07
15-150 7.540e-06 4.474e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.94392 (-0.13897 0.138974)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.01 using 59 PHA bins.
# Reduced chi-squared = 1.316 for 57 degrees of freedom
# Null hypothesis probability = 5.515876e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.269e-06 7.060e-08
25- 50 2.441e-06 1.284e-07
50-150 5.354e-06 3.474e-07
15-150 9.064e-06 5.060e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.62291 (-1.32027 1.44784)
R1^2/D10^2 : 0.519569 (-0.21756 0.463732)
kT2 [keV] : 27.0379 (-4.03898 6.52086)
R2^2/D10^2 : 8.08682E-03 (-0.00435993 0.00682378)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.55 using 59 PHA bins.
# Reduced chi-squared = 1.337 for 55 degrees of freedom
# Null hypothesis probability = 4.807615e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.075e-06 2.018e-07
25- 50 2.455e-06 3.810e-07
50-150 5.661e-06 1.247e-06
15-150 9.192e-06 1.467e-06
Peak spectrum fit
Power-law model
Time interval is from 77.052 sec. to 78.052 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45890 ( -0.333764 0.332016 )
Norm@50keV : 1.87974E-02 ( -0.00373642 0.0037221 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.09 using 59 PHA bins.
# Reduced chi-squared = 1.107 for 57 degrees of freedom
# Null hypothesis probability = 2.698402e-01
Photon flux (15-150 keV) in 1 sec: 2.32167 ( -0.473313 0.47478 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.79585e-07 ( -3.8252e-08 3.86093e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 77.052 sec. to 78.052 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32140 ( -1.38568 1.64477 )
Epeak [keV] : 238.015 ( -251.875 -251.875 )
Norm@50keV : 2.21213E-02 ( -0.00690004 0.0901842 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.05 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 56 degrees of freedom
# Null hypothesis probability = 2.410856e-01
Photon flux (15-150 keV) in 1 sec: 2.31364 ( -0.47717 0.47876 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.78313e-07 ( -4.0873e-08 3.9607e-08 ) ergs/cm2
Band function
Time interval is from 77.052 sec. to 78.052 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.87464 ( -4.87464 -4.87464 )
beta : -1.57196 ( -0.780067 0.379783 )
Epeak [keV] : 25.1064 ( -25.1064 13.811 )
Norm@50keV : 1562.66 ( -304.8 1.08015e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.05 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 55 degrees of freedom
# Null hypothesis probability = 2.394099e-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] : 14.3135 (-3.55277 5.4791)
R^2/D10^2 : 0.313826 (-0.212313 0.553174)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.94 using 59 PHA bins.
# Reduced chi-squared = 1.244 for 57 degrees of freedom
# Null hypothesis probability = 1.014947e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.355e-08 5.701e-09
25- 50 5.150e-08 1.784e-08
50-150 7.026e-08 2.968e-08
15-150 1.353e-07 4.647e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-99.4549 -199.363)
Norm : 9.62043 (-1.89374 1.89382)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.31 using 59 PHA bins.
# Reduced chi-squared = 1.111 for 57 degrees of freedom
# Null hypothesis probability = 2.636120e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.396e-08 1.424e-08
25- 50 4.608e-08 2.677e-08
50-150 1.011e-07 5.780e-08
15-150 1.711e-07 9.790e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.38928 (-2.77578 3.65011)
R1^2/D10^2 : 1.56964 (-1.09821 1.93889)
kT2 [keV] : 41.2844 (-19.7034 -41.2866)
R2^2/D10^2 : 6.81527E-03 (-0.00661539 0.0173261)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.02 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 55 degrees of freedom
# Null hypothesis probability = 2.685080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.211e-08 1.318e-08
25- 50 4.926e-08 2.770e-08
50-150 1.122e-07 5.780e-08
15-150 1.835e-07 9.245e-08
Plot creation:
Sun Apr 13 10:56:56 EDT 2014