batgrbproduct Analysis for Trigger=552374
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 Apr 3 16:24:36 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger552374/batgroup_hand_proc
======================================================================
Trigger: 00552374 Segment: 000
BAT Trigger Time: 386354848 [s; MET]
Trigger Stop: 386354912 [s; MET]
UTC: 2013-03-30T16:47:17.616840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.074501135966 Dec: -15.4571678668251 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 21.53
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 21.53
Flight Position: [ source = BAT ]
RA: 245.074501135966 Dec: -15.4571678668251 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.070474168547 Dec: -15.3727859270972 [deg; J2000]
{ 16h 20m 16.9s , -15d 22' 22.0" }
+/- 1.98930411571502 [arcmin] (estimated 90% radius based on SNR)
+/- 1.4317130768749 [arcmin] (formal 1-sigma fit error)
SNR: 11.3868187263743
Angular difference between Flight and Ground position is 5.068272 arcmin
Partial Coding Fraction: 0.3164062 [ including projection effects ]
Duration
T90: 310.143999934196 +/- 58.2614644942428
Measured from: 6.31599998474121
to: 316.459999918938 [s; relative to TRIGTIME]
T50: 128.263999938965 +/- 79.4170787924006
Measured from: 33.3479999899864
to: 161.611999928951 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 15.0759999752045
to: 16.0759999752045 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.48000001907349
to: 335.791999995708 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 24.950739 1.575853 -0.272250 -0.195488
0.241358 0.194749 0.163747 0.145882 [error]
Peak 0.144328 0.023772 0.011200 0.004274
0.014025 0.010610 0.009440 0.007832 [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 8.87e-06 8.10e-07 2.92e-08 1.09e-09 9.71e-06 9.71e-06 erg/cm2
Error 7.44e-07 9.26e-08 8.77e-09 5.62e-10 7.36e-07 7.36e-07 erg/cm2
Peak flux Power-law 1.53e+00 2.25e-01 1.50e-02 1.07e-03 1.77e+00 1.77e+00 ph/cm2/s
Error 2.94e-01 1.11e-01 2.08e-02 2.84e-03 3.33e-01 3.33e-01 ph/cm2/s
Fluence Cutoff-PL 8.65e-06 5.67e-07 1.72e-10 3.52e-18 9.21e-06 9.21e-06 erg/cm2
Error 8.62e-07 1.14e-07 7.23e-10 6.35e-15 8.63e-07 8.63e-07 erg/cm2
Peak flux Cutoff-PL 1.53e+00 2.17e-01 1.38e-02 9.36e-04 1.76e+00 1.76e+00 ph/cm2/s
Error 2.91e-01 1.11e-01 1.53e-02 2.00e-03 3.32e-01 2.50e-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 6.791 0.281 - - 1.06e-04 2.63e-05 0.000 57
CPL 1.000 0.000 50.0 0.0 2.07e-03 0.00e+00 0.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.904 0.966 - - 1.26e-03 1.23e-03 0.000 57
CPL 1.000 0.000 50.0 0.0 2.14e-02 0.00e+00 0.000 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 342.272 -6.480 335.792
T90 310.144 6.316 316.460
T50 128.264 33.348 161.612
Peak 1.000 15.076 16.076
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.0705 -15.3728 0.0169 30.5914 104.6025 7.2294101 11.387 TRIG_00552374
Foreground time interval of the image:
-6.480 335.792 (delta_t = 342.272 [sec])
Background time interval of the image:
-239.000 -6.480 (delta_t = 232.520 [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 -6.480 sec. to 335.792 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.79086 ( -0.281667 0.280211 )
Norm@50keV : 1.06033E-04 ( -2.35691e-05 2.90499e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.19 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.964973e-01
Photon flux (15-150 keV) in 342.3 sec: 0.976322 ( -0.0794337 0.080127 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.70677e-06 ( -7.33046e-07 7.38701e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.480 sec. to 335.792 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.07429E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 632.37 using 59 PHA bins.
# Reduced chi-squared = 11.292 for 56 degrees of freedom
# Null hypothesis probability = 1.519452e-98
Photon flux (15-150 keV) in 342.3 sec: 0.924459 ( -0.095365 0.093271 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.21427e-06 ( -8.72386e-07 8.53285e-07 ) ergs/cm2
Band function
Time interval is from -6.480 sec. to 335.792 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.31265 ( -1.53506 1.51818 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 10.0668 ( -0.473234 3.47634 )
Norm@50keV : 2744.43 ( -171.962 210787 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.42 using 59 PHA bins.
# Reduced chi-squared = 0.7530 for 55 degrees of freedom
# Null hypothesis probability = 9.123626e-01
Photon flux (15-150 keV) in 342.3 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] : 2.42314 (-0.11122 0.122311)
R^2/D10^2 : 578.043 (-206.431 311.097)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.24 using 59 PHA bins.
# Reduced chi-squared = 0.7235 for 57 degrees of freedom
# Null hypothesis probability = 9.424550e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.624e-06 1.150e-06
25- 50 5.578e-07 8.712e-08
50-150 1.291e-10 6.481e-11
15-150 9.182e-06 1.232e-06
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 3.97768 (-0.256536 0.291818)
Norm : 548.498 (-171.863 243.53)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.88 using 59 PHA bins.
# Reduced chi-squared = 0.7523 for 57 degrees of freedom
# Null hypothesis probability = 9.172950e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.824e-06 1.041e-06
25- 50 6.331e-07 9.037e-08
50-150 9.008e-10 4.580e-10
15-150 9.458e-06 9.944e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.43083 (-0.116843 0.117686)
R1^2/D10^2 : 563.446 (-198.456 319.477)
kT2 [keV] : 199.363 (-87.2255 -87.2255)
R2^2/D10^2 : 2.21222E-16 (-8.34718e-19 0.00376523)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.25 using 59 PHA bins.
# Reduced chi-squared = 0.7500 for 55 degrees of freedom
# Null hypothesis probability = 9.153559e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.607e-06 1.106e-06
25- 50 5.641e-07 8.472e-08
50-150 1.349e-10 6.772e-11
15-150 9.172e-06 1.162e-06
Peak spectrum fit
Power-law model
Time interval is from 15.076 sec. to 16.076 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.90404 ( -0.884754 1.04738 )
Norm@50keV : 1.25739E-03 ( -0.000840318 0.00161967 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.44 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 57 degrees of freedom
# Null hypothesis probability = 2.889202e-01
Photon flux (15-150 keV) in 1 sec: 1.77098 ( -0.332622 0.332488 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.71483e-08 ( -1.20544e-08 1.26416e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 15.076 sec. to 16.076 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.13650E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 106.64 using 59 PHA bins.
# Reduced chi-squared = 1.9044 for 56 degrees of freedom
# Null hypothesis probability = 5.296064e-05
Photon flux (15-150 keV) in 1 sec: 1.76320 ( -0.32786 0.33613 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.64276e-08 ( -1.14506e-08 1.31243e-08 ) ergs/cm2
Band function
Time interval is from 15.076 sec. to 16.076 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.09441 ( 3.90667 6.09441 )
beta : -5.04279 ( -1.05771 0.893314 )
Epeak [keV] : 258.044 ( -258.044 -258.044 )
Norm@50keV : 0.148202 ( -0.114241 0.219904 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.50 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 55 degrees of freedom
# Null hypothesis probability = 2.271858e-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] : 2.74412 (-0.482667 0.607488)
R^2/D10^2 : 444.160 (-444.28 1339.41)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.80 using 59 PHA bins.
# Reduced chi-squared = 1.137 for 57 degrees of freedom
# Null hypothesis probability = 2.233128e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.670e-08 2.634e-08
25- 50 4.932e-09 2.974e-09
50-150 3.722e-12 4.030e-12
15-150 5.163e-08 2.885e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.49075 (-1.48659 2.39641)
Norm : 289.869 (-190.658 645.585)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.97 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 57 degrees of freedom
# Null hypothesis probability = 2.451951e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.582e-08 2.359e-08
25- 50 7.107e-09 4.382e-09
50-150 5.788e-11 5.838e-11
15-150 5.299e-08 2.502e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.47486 (-0.511755 0.553279)
R1^2/D10^2 : 846.886 (-645.823 3958.95)
kT2 [keV] : 14.2998 (-8.02224 14.2096)
R2^2/D10^2 : 5.45127E-02 (-0.0515647 0.791041)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.42 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 55 degrees of freedom
# Null hypothesis probability = 3.178786e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.550e-08 2.420e-08
25- 50 1.197e-08 7.355e-09
50-150 1.214e-08 9.550e-09
15-150 6.961e-08 3.572e-08
Plot creation:
Wed Apr 3 16:43:05 EDT 2013