batgrbproduct Analysis for Trigger=633105
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): Wed Mar 11 13:51:33 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger633105/batgroup_hand_proc
======================================================================
Trigger: 00633105 Segment: 000
BAT Trigger Time: 446883667.392 [s; MET]
Trigger Stop: 446883671.488 [s; MET]
UTC: 2015-03-01T06:20:54.142000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 11.3318427849221 Dec: 41.8571401016604 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.75
Image Trigger?: NO
Rate S/N Ratio: 13.6014705087354 [ if not an image trigger ]
Image S/N Ratio: 8.75
Flight Position: [ source = BAT ]
RA: 11.3318427849221 Dec: 41.8571401016604 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 11.3174628753189 Dec: 41.8558983109632 [deg; J2000]
{ 00h 45m 16.2s , +41d 51' 21.2" }
+/- 2.09167805374168 [arcmin] (estimated 90% radius based on SNR)
+/- 0.799193393538057 [arcmin] (formal 1-sigma fit error)
SNR: 10.5990907088333
Angular difference between Flight and Ground position is 0.646930 arcmin
Partial Coding Fraction: 0.6953125 [ including projection effects ]
Duration
T90: 13.8080000281334 +/- 2.70797341334817
Measured from: -0.0320000052452087
to: 13.7760000228882 [s; relative to TRIGTIME]
T50: 7.32800000905991 +/- 2.76762998725776
Measured from: 1.72799998521805
to: 9.05599999427795 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.44400000572205
to: 2.44400000572205 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.703999996185303
to: 14.6879999637604 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.191740 0.229691 0.052633 0.017774
0.025359 0.025262 0.021713 0.019044 [error]
Peak 0.018963 0.033774 0.020390 0.007236
0.006603 0.006774 0.005607 0.004792 [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 6.03e-08 7.73e-08 7.24e-08 1.19e-07 2.50e-07 3.30e-07 erg/cm2
Error 1.08e-08 1.15e-08 1.87e-08 5.81e-08 4.44e-08 8.23e-08 erg/cm2
Peak flux Power-law 2.20e-01 2.08e-01 1.37e-01 1.40e-01 6.22e-01 7.04e-01 ph/cm2/s
Error 8.14e-02 5.23e-02 4.42e-02 8.73e-02 1.54e-01 1.76e-01 ph/cm2/s
Fluence Cutoff-PL 5.36e-08 1.02e-07 4.87e-08 3.18e-09 2.07e-07 2.07e-07 erg/cm2
Error 1.25e-08 1.75e-08 2.44e-08 1.02e-08 3.79e-08 3.88e-08 erg/cm2
Peak flux Cutoff-PL 1.68e-01 2.50e-01 1.48e-01 2.73e-02 5.90e-01 5.94e-01 ph/cm2/s
Error 9.80e-02 7.26e-02 5.66e-02 7.14e-02 1.58e-01 1.67e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- 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 2.094 0.254 - - 1.75e-03 3.37e-04 64.930 57
CPL -0.588 1.811 35.2 6.0 8.24e-02 8.79e-01 54.360 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 1.603 0.395 - - 4.83e-03 1.26e-03 54.740 57
CPL -0.248 2.569 56.4 157.7 4.69e-02 1.21e+00 51.790 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 15.392 -0.704 14.688
T90 13.808 -0.032 13.776
T50 7.328 1.728 9.056
Peak 1.000 1.444 2.444
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
11.3175 41.8559 0.0182 21.9005 -103.8800 0.4879084 10.599 TRIG_00633105
Foreground time interval of the image:
-0.704 14.688 (delta_t = 15.392 [sec])
Background time interval of the image:
-239.392 -0.704 (delta_t = 238.688 [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 -0.704 sec. to 14.688 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.09403 ( -0.244013 0.263939 )
Norm@50keV : 1.75122E-03 ( -0.000339606 0.000334791 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.93 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 57 degrees of freedom
# Null hypothesis probability = 2.198907e-01
Photon flux (15-150 keV) in 15.39 sec: 0.274701 ( -0.0390509 0.0390587 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.50229e-07 ( -4.34812e-08 4.52209e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.704 sec. to 14.688 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.588399 ( -2.07573 1.5457 )
Epeak [keV] : 35.1844 ( -5.65557 6.43166 )
Norm@50keV : 8.23997E-02 ( -0.0855367 1.67159 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.36 using 59 PHA bins.
# Reduced chi-squared = 0.9707 for 56 degrees of freedom
# Null hypothesis probability = 5.371838e-01
Photon flux (15-150 keV) in 15.39 sec: 0.261730 ( -0.038176 0.03845 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.06919e-07 ( -3.51338e-08 4.06419e-08 ) ergs/cm2
Band function
Time interval is from -0.704 sec. to 14.688 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.615441 ( -1.48073 2.3274 )
beta : -9.99913 ( 9.99913 19.9983 )
Epeak [keV] : 35.1710 ( -5.14943 6.02725 )
Norm@50keV : 8.58694E-02 ( -0.0117427 1.67766 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.36 using 59 PHA bins.
# Reduced chi-squared = 0.9883 for 55 degrees of freedom
# Null hypothesis probability = 4.990893e-01
Photon flux (15-150 keV) in 15.39 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] : 9.02792 (-1.15518 1.30931)
R^2/D10^2 : 0.203853 (-0.0841276 0.142998)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.09 using 59 PHA bins.
# Reduced chi-squared = 0.9665 for 57 degrees of freedom
# Null hypothesis probability = 5.470370e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.986e-08 1.178e-08
25- 50 1.065e-07 2.112e-08
50-150 4.101e-08 1.709e-08
15-150 1.974e-07 4.209e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 49.1816 (-14.3742 24.7885)
Norm : 1.61112 (-0.331599 0.437215)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.81 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 57 degrees of freedom
# Null hypothesis probability = 4.090623e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.039e-08 1.144e-08
25- 50 8.623e-08 1.497e-08
50-150 8.242e-08 3.722e-08
15-150 2.290e-07 5.025e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.74153 (-4.72539 -4.72539)
R1^2/D10^2 : 0.611589 (-0.616447 -0.616447)
kT2 [keV] : 10.2026 (-10.1997 -10.1997)
R2^2/D10^2 : 0.108012 (-0.108237 0.208204)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.25 using 59 PHA bins.
# Reduced chi-squared = 0.9864 for 55 degrees of freedom
# Null hypothesis probability = 5.031872e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.389e-08 2.873e-08
25- 50 1.012e-07 5.790e-08
50-150 5.048e-08 3.104e-08
15-150 2.056e-07 1.107e-07
Peak spectrum fit
Power-law model
Time interval is from 1.444 sec. to 2.444 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60290 ( -0.385237 0.403848 )
Norm@50keV : 4.83229E-03 ( -0.00127446 0.00125151 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.74 using 59 PHA bins.
# Reduced chi-squared = 0.9604 for 57 degrees of freedom
# Null hypothesis probability = 5.601985e-01
Photon flux (15-150 keV) in 1 sec: 0.621523 ( -0.153592 0.153833 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.51781e-08 ( -1.24193e-08 1.27856e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.444 sec. to 2.444 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.248423 ( -3.30265 1.83608 )
Epeak [keV] : 56.3970 ( -15.1467 300.205 )
Norm@50keV : 4.68601E-02 ( -0.0468601 2.38072 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.79 using 59 PHA bins.
# Reduced chi-squared = 0.9248 for 56 degrees of freedom
# Null hypothesis probability = 6.348998e-01
Photon flux (15-150 keV) in 1 sec: 0.590126 ( -0.15828 0.157507 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.02011e-08 ( -1.19487e-08 1.35105e-08 ) ergs/cm2
Band function
Time interval is from 1.444 sec. to 2.444 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.217495 ( -1.33374 0.339386 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 56.4582 ( -15.2649 50.4507 )
Norm@50keV : 4.53472E-02 ( -0.0453132 2.38932 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.79 using 59 PHA bins.
# Reduced chi-squared = 0.9416 for 55 degrees of freedom
# Null hypothesis probability = 5.980504e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.01805e-08 ( -4.01735e-08 -1.19335e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.3899 (-2.91268 3.92429)
R^2/D10^2 : 0.112011 (-0.0685857 0.158646)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.37 using 59 PHA bins.
# Reduced chi-squared = 0.9188 for 57 degrees of freedom
# Null hypothesis probability = 6.491778e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.255e-09 2.069e-09
25- 50 1.512e-08 6.622e-09
50-150 1.744e-08 9.424e-09
15-150 3.681e-08 1.512e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 155.877 (-91.015 -151.888)
Norm : 2.56692 (-0.660214 0.935719)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.56 using 59 PHA bins.
# Reduced chi-squared = 0.9396 for 57 degrees of freedom
# Null hypothesis probability = 6.050419e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.571e-09 3.773e-09
25- 50 1.225e-08 7.075e-09
50-150 2.455e-08 1.557e-08
15-150 4.337e-08 2.549e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.56643 (-4.54341 -4.54341)
R1^2/D10^2 : 1.37780 (-1.3928 -1.3928)
kT2 [keV] : 14.9758 (-4.14306 -14.9696)
R2^2/D10^2 : 6.86641E-02 (-0.0687834 0.17244)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.71 using 59 PHA bins.
# Reduced chi-squared = 0.9401 for 55 degrees of freedom
# Null hypothesis probability = 6.012646e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.523e-09 2.983e-09
25- 50 1.399e-08 8.030e-09
50-150 1.955e-08 1.169e-08
15-150 3.906e-08 2.223e-08
Plot creation:
Wed Mar 11 14:00:17 EDT 2015