batgrbproduct Analysis for Trigger=576738
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): Tue Nov 5 14:58:06 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger576738/batgroup_hand_proc
======================================================================
Trigger: 00576738 Segment: 000
BAT Trigger Time: 405309896 [s; MET]
Trigger Stop: 405310104 [s; MET]
UTC: 2013-11-05T02:04:44.765060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 71.0114112270193 Dec: -62.9813396525796 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.83
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.83
Flight Position: [ source = BAT ]
RA: 71.0114112270193 Dec: -62.9813396525796 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 70.9730162090474 Dec: -63.0049241777243 [deg; J2000]
{ 04h 43m 53.5s , -63d 00' 17.7" }
+/- 1.45873007947746 [arcmin] (estimated 90% radius based on SNR)
+/- 0.522484857907665 [arcmin] (formal 1-sigma fit error)
SNR: 17.736522251099
Angular difference between Flight and Ground position is 1.759762 arcmin
Partial Coding Fraction: 0.07714844 [ including projection effects ]
Duration
T90: 112.288000047207 +/- 4.08680221617042
Measured from: 11.2240000963211
to: 123.512000143528 [s; relative to TRIGTIME]
T50: 73.7600000500679 +/- 1.79271418191698
Measured from: 41.8800001144409
to: 115.640000164509 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 116.635999977589
to: 117.635999977589 [s; relative to TRIGTIME]
Total Fluence
Measured from: 6.79199999570847
to: 125.592000007629 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.739056 3.812187 3.273727 1.130065
0.212709 0.227031 0.200225 0.170704 [error]
Peak 0.053249 0.216810 0.153324 0.063709
0.022784 0.026260 0.024891 0.020923 [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 9.05e-07 1.71e-06 2.50e-06 7.81e-06 7.09e-06 1.29e-05 erg/cm2
Error 1.06e-07 1.19e-07 1.94e-07 1.35e-06 4.76e-07 1.47e-06 erg/cm2
Peak flux Power-law 8.72e-01 1.08e+00 9.77e-01 1.53e+00 3.46e+00 4.46e+00 ph/cm2/s
Error 2.89e-01 2.25e-01 1.77e-01 5.77e-01 6.14e-01 7.75e-01 ph/cm2/s
Fluence Cutoff-PL 9.08e-07 1.72e-06 2.50e-06 7.74e-06 7.09e-06 1.29e-05 erg/cm2
Error 9.93e-08 1.24e-07 1.94e-07 1.98e-06 4.80e-07 1.96e-06 erg/cm2
Peak flux Cutoff-PL 7.47e-01 1.15e+00 1.06e+00 3.39e+00 3.72e+00 0.00e+00 ph/cm2/s
Error 3.38e-01 2.64e-01 2.21e-01 6.24e-01 1.07e+00 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 1.452 0.112 - - 6.24e-03 3.89e-04 43.820 57
CPL 1.448 0.245 9974.3 0.0 6.27e-03 1.73e-03 43.830 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 1.148 0.280 - - 2.97e-02 5.04e-03 64.730 57
CPL 0.414 1.175 116.4 0.0 6.65e-02 0.00e+00 63.580 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: 113.984000 sec.
T50 in the 50-300 keV band: 72.960000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 118.800 6.792 125.592
T90 112.288 11.224 123.512
T50 73.760 41.880 115.640
Peak 1.000 116.636 117.636
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
70.9730 -63.0049 0.0108 41.7520 -96.7176 11.4141081 17.737 TRIG_00576738
Foreground time interval of the image:
6.792 125.592 (delta_t = 118.800 [sec])
Background time interval of the image:
-239.000 -19.360 (delta_t = 219.640 [sec])
-18.000 -14.560 (delta_t = 3.440 [sec])
-13.000 6.792 (delta_t = 19.792 [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 6.792 sec. to 125.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45246 ( -0.11238 0.112268 )
Norm@50keV : 6.24159E-03 ( -0.000389021 0.000388703 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.82 using 59 PHA bins.
# Reduced chi-squared = 0.7688 for 57 degrees of freedom
# Null hypothesis probability = 8.998789e-01
Photon flux (15-150 keV) in 118.8 sec: 0.769661 ( -0.0508562 0.0510396 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.09242e-06 ( -4.75432e-07 4.77551e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.792 sec. to 125.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44814 ( -0.375481 0.113533 )
Epeak [keV] : 9974.29 ( -9998.3 -9998.3 )
Norm@50keV : 6.26764E-03 ( -0.000390373 0.00307294 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.83 using 59 PHA bins.
# Reduced chi-squared = 0.7827 for 56 degrees of freedom
# Null hypothesis probability = 8.813228e-01
Photon flux (15-150 keV) in 118.8 sec: 0.769814 ( -0.051182 0.05008 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.08698e-06 ( -4.79489e-07 4.80855e-07 ) ergs/cm2
Band function
Time interval is from 6.792 sec. to 125.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.91812 ( -4.91812 -4.91812 )
beta : -1.46662 ( -0.117956 0.115719 )
Epeak [keV] : 20.1772 ( -20.1772 5.49386 )
Norm@50keV : 2033.14 ( -126.213 2.69726e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.68 using 59 PHA bins.
# Reduced chi-squared = 0.7942 for 55 degrees of freedom
# Null hypothesis probability = 8.640713e-01
Photon flux (15-150 keV) in 118.8 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] : 16.9071 ( )
R^2/D10^2 : 5.69184E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 116.90 using 59 PHA bins.
# Reduced chi-squared = 2.0509 for 57 degrees of freedom
# Null hypothesis probability = 5.108885e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.942e-07 5.067e-08
25- 50 1.737e-06 1.455e-07
50-150 3.538e-06 3.932e-07
15-150 5.669e-06 4.211e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.18152 (-0.198274 0.198256)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.92 using 59 PHA bins.
# Reduced chi-squared = 0.8582 for 57 degrees of freedom
# Null hypothesis probability = 7.681815e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.412e-07 6.908e-08
25- 50 1.811e-06 1.396e-07
50-150 3.971e-06 8.886e-07
15-150 6.723e-06 7.793e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.91515 (-1.40643 1.69249)
R1^2/D10^2 : 0.843723 (-0.440627 1.10339)
kT2 [keV] : 29.3766 (-5.26882 9.66509)
R2^2/D10^2 : 7.11828E-03 (-0.00431917 0.00717725)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.46 using 59 PHA bins.
# Reduced chi-squared = 0.8448 for 55 degrees of freedom
# Null hypothesis probability = 7.868959e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.759e-07 2.188e-07
25- 50 1.724e-06 3.237e-07
50-150 4.506e-06 1.242e-06
15-150 7.106e-06 1.303e-06
Peak spectrum fit
Power-law model
Time interval is from 116.636 sec. to 117.636 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14809 ( -0.287249 0.27309 )
Norm@50keV : 2.96562E-02 ( -0.00505205 0.00503359 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.73 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 57 degrees of freedom
# Null hypothesis probability = 2.249840e-01
Photon flux (15-150 keV) in 1 sec: 3.45776 ( -0.612606 0.616108 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.05466e-07 ( -5.41051e-08 5.44315e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 116.636 sec. to 117.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.413966 ( -1.4846 0.865341 )
Epeak [keV] : 116.418 ( )
Norm@50keV : 6.64885E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.58 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 56 degrees of freedom
# Null hypothesis probability = 2.271033e-01
Photon flux (15-150 keV) in 1 sec: 3.38554 ( -0.62166 0.62604 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 116.636 sec. to 117.636 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.56039 -5 )
beta : -1.53599 ( -0.622566 0.411815 )
Epeak [keV] : 39.0576 ( -11.7169 9.84066 )
Norm@50keV : 188.630 ( -30.9016 1232.34 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.57 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 55 degrees of freedom
# Null hypothesis probability = 2.819431e-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] : 18.7451 (-3.57637 4.76082)
R^2/D10^2 : 0.205447 (-0.109803 0.214646)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.78 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 57 degrees of freedom
# Null hypothesis probability = 1.552972e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.426e-08 4.877e-09
25- 50 6.792e-08 1.900e-08
50-150 1.749e-07 6.367e-08
15-150 2.571e-07 6.240e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 14.6126 (-2.52634 2.52593)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.88 using 59 PHA bins.
# Reduced chi-squared = 1.226 for 57 degrees of freedom
# Null hypothesis probability = 1.175676e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.639e-08 2.134e-08
25- 50 7.000e-08 4.019e-08
50-150 1.535e-07 8.630e-08
15-150 2.599e-07 1.475e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 11.8110 (-4.54835 4.80466)
R1^2/D10^2 : 0.709572 (-0.462553 1.78596)
kT2 [keV] : 64.9434 (-45.1139 -64.9434)
R2^2/D10^2 : 3.48385E-03 (-0.00286478 0.080724)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.27 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 55 degrees of freedom
# Null hypothesis probability = 2.612292e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.220e-08 1.326e-08
25- 50 7.445e-08 4.296e-08
50-150 2.045e-07 1.014e-07
15-150 3.011e-07 1.446e-07
Plot creation:
Tue Nov 5 15:15:20 EST 2013