batgrbproduct Analysis for Trigger=599287
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 May 18 14:21:16 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger599287/batgroup_hand_proc
======================================================================
Trigger: 00599287 Segment: 000
BAT Trigger Time: 422097478.656 [s; MET]
Trigger Stop: 422097479.68 [s; MET]
UTC: 2014-05-18T09:17:46.630720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 227.269331468707 Dec: 42.4156655750532 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.66
Image Trigger?: NO
Rate S/N Ratio: 13.7477270848675 [ if not an image trigger ]
Image S/N Ratio: 8.66
Flight Position: [ source = BAT ]
RA: 227.269331468707 Dec: 42.4156655750532 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 227.23061892374 Dec: 42.3956197959279 [deg; J2000]
{ 15h 08m 55.3s , +42d 23' 44.2" }
+/- 1.75290119919535 [arcmin] (estimated 90% radius based on SNR)
+/- 0.839795177398952 [arcmin] (formal 1-sigma fit error)
SNR: 13.642484478941
Angular difference between Flight and Ground position is 2.094791 arcmin
Partial Coding Fraction: 0.890625 [ including projection effects ]
Duration
T90: 60.4919999837875 +/- 2.42918916112475
Measured from: -2.69600003957748
to: 57.7959999442101 [s; relative to TRIGTIME]
T50: 48.4919999241829 +/- 3.29093060775758
Measured from: 3.7039999961853
to: 52.1959999203682 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 41.944000005722
to: 42.944000005722 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.06800001859665
to: 60.039999961853 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.775527 0.870395 0.417108 0.000703
0.045592 0.045869 0.041170 0.038328 [error]
Peak 0.036722 0.056198 0.027364 0.005222
0.006026 0.006060 0.005422 0.004769 [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 2.46e-07 3.41e-07 3.49e-07 6.51e-07 1.14e-06 1.59e-06 erg/cm2
Error 2.39e-08 2.24e-08 3.92e-08 1.46e-07 8.97e-08 1.87e-07 erg/cm2
Peak flux Power-law 3.89e-01 3.40e-01 2.04e-01 1.84e-01 1.01e+00 1.12e+00 ph/cm2/s
Error 8.02e-02 4.87e-02 4.31e-02 7.39e-02 1.45e-01 1.65e-01 ph/cm2/s
Fluence Cutoff-PL 2.19e-07 3.79e-07 3.33e-07 1.44e-07 1.03e-06 1.08e-06 erg/cm2
Error 2.81e-08 3.05e-08 4.67e-08 1.16e-07 9.96e-08 1.54e-07 erg/cm2
Peak flux Cutoff-PL 3.21e-01 4.14e-01 1.99e-01 2.71e-02 9.57e-01 9.60e-01 ph/cm2/s
Error 9.53e-02 7.12e-02 5.62e-02 4.67e-02 1.48e-01 1.52e-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 1.966 0.126 - - 1.94e-03 1.57e-04 65.020 57
CPL 0.918 0.614 43.9 7.6 7.53e-03 6.95e-03 54.150 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 1.739 0.240 - - 7.52e-03 1.24e-03 75.750 57
CPL -0.101 1.508 48.3 14.2 8.35e-02 4.21e-01 68.700 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: 61.440000 sec.
T50 in the 50-300 keV band: 52.096000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.108 -4.068 60.040
T90 60.492 -2.696 57.796
T50 48.492 3.704 52.196
Peak 1.000 41.944 42.944
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
227.2306 42.3956 0.0141 20.2245 -44.0607 0.6696563 13.642 TRIG_00599287
Foreground time interval of the image:
-4.068 15.845 (delta_t = 19.913 [sec])
Background time interval of the image:
-347.555 -328.358 (delta_t = 19.197 [sec])
-239.656 -4.068 (delta_t = 235.588 [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 -4.068 sec. to 60.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96615 ( -0.124014 0.128085 )
Norm@50keV : 1.93599E-03 ( -0.000158283 0.000156307 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.02 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 57 degrees of freedom
# Null hypothesis probability = 2.175662e-01
Photon flux (15-150 keV) in 64.11 sec: 0.285970 ( -0.018945 0.0189562 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14284e-06 ( -8.90571e-08 9.03925e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.068 sec. to 60.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.918364 ( -0.656217 0.571492 )
Epeak [keV] : 43.8889 ( -6.59756 8.61589 )
Norm@50keV : 7.52766E-03 ( -0.00389031 0.0100023 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.15 using 59 PHA bins.
# Reduced chi-squared = 0.9670 for 56 degrees of freedom
# Null hypothesis probability = 5.451188e-01
Photon flux (15-150 keV) in 64.11 sec: 0.271823 ( -0.020147 0.0202 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03261e-06 ( -9.68382e-08 1.02396e-07 ) ergs/cm2
Band function
Time interval is from -4.068 sec. to 60.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.918300 ( -0.472983 0.782641 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 43.8796 ( -6.59447 8.6283 )
Norm@50keV : 7.52811E-03 ( -0.00389107 0.0100361 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.15 using 59 PHA bins.
# Reduced chi-squared = 0.9846 for 55 degrees of freedom
# Null hypothesis probability = 5.069861e-01
Photon flux (15-150 keV) in 64.11 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] : 10.7049 (-0.789232 0.850513)
R^2/D10^2 : 0.102313 (-0.0257903 0.0345788)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.80 using 59 PHA bins.
# Reduced chi-squared = 1.418 for 57 degrees of freedom
# Null hypothesis probability = 2.075526e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.561e-07 1.920e-08
25- 50 4.261e-07 3.154e-08
50-150 2.700e-07 4.363e-08
15-150 8.522e-07 6.251e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 69.2775 (-13.0115 18.0674)
Norm : 1.40774 (-0.145905 0.167075)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.43 using 59 PHA bins.
# Reduced chi-squared = 0.9725 for 57 degrees of freedom
# Null hypothesis probability = 5.340265e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.313e-07 2.074e-08
25- 50 3.669e-07 2.728e-08
50-150 4.677e-07 8.959e-08
15-150 1.066e-06 9.296e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.34129 (-1.21788 1.69604)
R1^2/D10^2 : 1.70073 (-1.20487 4.342)
kT2 [keV] : 14.0458 (-1.84746 3.03786)
R2^2/D10^2 : 3.04196E-02 (-0.0179348 0.0300408)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.08 using 59 PHA bins.
# Reduced chi-squared = 0.9651 for 55 degrees of freedom
# Null hypothesis probability = 5.482982e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.267e-07 9.327e-08
25- 50 3.691e-07 1.052e-07
50-150 3.958e-07 1.248e-07
15-150 9.915e-07 2.189e-07
Peak spectrum fit
Power-law model
Time interval is from 41.944 sec. to 42.944 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73865 ( -0.234547 0.245942 )
Norm@50keV : 7.52273E-03 ( -0.00124723 0.00122511 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.75 using 59 PHA bins.
# Reduced chi-squared = 1.329 for 57 degrees of freedom
# Null hypothesis probability = 4.898266e-02
Photon flux (15-150 keV) in 1 sec: 1.01297 ( -0.144777 0.144798 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.94672e-08 ( -1.17606e-08 1.20935e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 41.944 sec. to 42.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.100875 ( -1.75581 1.26052 )
Epeak [keV] : 48.3258 ( -8.61124 19.7655 )
Norm@50keV : 8.35014E-02 ( -0.083805 0.758317 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.70 using 59 PHA bins.
# Reduced chi-squared = 1.227 for 56 degrees of freedom
# Null hypothesis probability = 1.186190e-01
Photon flux (15-150 keV) in 1 sec: 0.957277 ( -0.147431 0.148293 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.93899e-08 ( -1.1253e-08 1.29063e-08 ) ergs/cm2
Band function
Time interval is from 41.944 sec. to 42.944 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.102922 ( -1.15625 2.60576 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 48.3071 ( -8.52908 19.7703 )
Norm@50keV : 8.37470E-02 ( -0.0837469 0.757734 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.70 using 59 PHA bins.
# Reduced chi-squared = 1.249 for 55 degrees of freedom
# Null hypothesis probability = 1.013459e-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] : 11.5521 (-1.57885 1.85669)
R^2/D10^2 : 0.299747 (-0.127504 0.2146)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.66 using 59 PHA bins.
# Reduced chi-squared = 1.240 for 57 degrees of freedom
# Null hypothesis probability = 1.054998e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.426e-09 2.311e-09
25- 50 2.534e-08 5.240e-09
50-150 1.980e-08 6.385e-09
15-150 5.356e-08 1.116e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.0829 (-36.8539 90.3795)
Norm : 4.57116 (-0.795545 0.991824)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.11 using 59 PHA bins.
# Reduced chi-squared = 1.265 for 57 degrees of freedom
# Null hypothesis probability = 8.570173e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.195e-08 2.445e-09
25- 50 2.058e-08 4.190e-09
50-150 3.298e-08 1.794e-08
15-150 6.550e-08 2.168e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.76092 (-6.81918 -6.81918)
R1^2/D10^2 : 0.863709 (-0.841191 -0.841191)
kT2 [keV] : 15.0575 (-15.2128 -15.2128)
R2^2/D10^2 : 8.27864E-02 (-0.0779109 0.3277)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.80 using 59 PHA bins.
# Reduced chi-squared = 1.251 for 55 degrees of freedom
# Null hypothesis probability = 9.999556e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.004e-08 5.790e-09
25- 50 2.347e-08 1.224e-08
50-150 2.534e-08 1.512e-08
15-150 5.885e-08 3.058e-08
Plot creation:
Sun May 18 14:29:13 EDT 2014