batgrbproduct Analysis for Trigger=574266
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): Sat Oct 12 11:02:05 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger574266/batgroup_hand_proc
======================================================================
Trigger: 00574266 Segment: 000
BAT Trigger Time: 403222629.376 [s; MET]
Trigger Stop: 403222631.424 [s; MET]
UTC: 2013-10-11T22:16:58.236680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 42.2859901141018 Dec: 7.4399243641511 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6
Image Trigger?: NO
Rate S/N Ratio: 28.6530975637888 [ if not an image trigger ]
Image S/N Ratio: 6
Flight Position: [ source = BAT ]
RA: 42.2859901141018 Dec: 7.4399243641511 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 42.3083343097395 Dec: 7.41148589538939 [deg; J2000]
{ 02h 49m 14.0s , +07d 24' 41.3" }
+/- 3.51243486675525 [arcmin] (estimated 90% radius based on SNR)
+/- 2.25798262912741 [arcmin] (formal 1-sigma fit error)
SNR: 5.05449743583934
Angular difference between Flight and Ground position is 2.163056 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 2.04800003767014 +/-
Measured from: 0
to: 2.04800003767014 [s; relative to TRIGTIME]
T50: 2.04800003767014 +/-
Measured from: 0
to: 2.04800003767014 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 2.04800003767014 second)
Measured from: -2.98023223876953e-08
to: 2.04800000786781 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 2.04800003767014 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.007587 0.006213 0.022076 0.041984
0.007187 0.007832 0.007704 0.007858 [error]
Peak -0.007587 0.006213 0.022076 0.041984
0.007187 0.007832 0.007704 0.007858 [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 1.25e-10 1.38e-09 1.38e-08 9.74e-07 5.92e-08 9.92e-07 erg/cm2
Error 2.49e-10 1.67e-09 7.12e-09 4.84e-07 2.26e-08 4.83e-07 erg/cm2
Peak flux Power-law 1.86e-03 1.07e-02 5.37e-02 1.17e+00 1.71e-01 1.23e+00 ph/cm2/s
Error 3.75e-03 1.33e-02 2.86e-02 5.45e-01 7.25e-02 5.39e-01 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 2.63e-04 4.20e-03 4.70e-02 1.73e-01 1.04e+00 0.00e+00 ph/cm2/s
Error 2.95e-03 1.15e-02 3.70e-02 8.41e-02 1.23e+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 -1.323 0.677 - - 6.23e-04 5.13e-04 55.760 57
CPL -3.686 0.000 325.8 0.0 7.55e-04 6.54e-03 54.840 56
The chi2 of BB fit is Chi-Squared Chi-Squared 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 -1.323 0.677 - - 6.23e-04 5.13e-04 55.760 57
CPL -3.686 0.000 325.8 0.0 7.55e-04 7.23e-03 54.840 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: 1.920000 sec.
T50 in the 50-300 keV band: 0.960000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 2.048 0.000 2.048
T90 2.048 0.000 2.048
T50 2.048 0.000 2.048
Peak 2.048 -0.000 2.048
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
42.3083 7.4115 0.0380 13.3570 35.7185 0.0743513 5.054 TRIG_00574266
Foreground time interval of the image:
0.000 2.048 (delta_t = 2.048 [sec])
Background time interval of the image:
-239.376 -207.826 (delta_t = 31.550 [sec])
-206.376 -13.376 (delta_t = 193.000 [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 0.000 sec. to 2.048 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.32340 ( -0.550159 0.803046 )
Norm@50keV : 6.22823E-04 ( -0.000377911 0.000648492 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.76 using 59 PHA bins.
# Reduced chi-squared = 0.9782 for 57 degrees of freedom
# Null hypothesis probability = 5.218433e-01
Photon flux (15-150 keV) in 2.048 sec: 0.171263 ( -0.0742942 0.070645 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.91763e-08 ( -2.39854e-08 2.11575e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.68584 ( )
Epeak [keV] : 325.801 ( -330.098 -330.098 )
Norm@50keV : 7.54598E-04 ( -0.000742063 0.0123332 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.84 using 59 PHA bins.
# Reduced chi-squared = 0.9794 for 56 degrees of freedom
# Null hypothesis probability = 5.186544e-01
Photon flux (15-150 keV) in 2.048 sec: 0.173334 ( -0.0987146 0.069479 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.94975 -4.94975 )
beta : 0.926754 ( -0.525017 1.31106 )
Epeak [keV] : 206.850 ( -197.144 683.335 )
Norm@50keV : 1.67024E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.83 using 59 PHA bins.
# Reduced chi-squared = 0.9968 for 55 degrees of freedom
# Null hypothesis probability = 4.812405e-01
Photon flux (15-150 keV) in 2.048 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] : 198.019 ( )
R^2/D10^2 : 1.08340E-04 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.12 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 57 degrees of freedom
# Null hypothesis probability = 4.705075e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.72 using 59 PHA bins.
# Reduced chi-squared = 1.434 for 57 degrees of freedom
# Null hypothesis probability = 1.756905e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.363 ( )
R1^2/D10^2 : 1.09701E-04 (-3.64858e-05 0.000353722)
kT2 [keV] : 10.0000 (-10 -10)
R2^2/D10^2 : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.72 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.10 using 59 PHA bins.
# Reduced chi-squared = 1.486 for 55 degrees of freedom
# Reduced chi-squared = 1.038 for 55 degrees of freedom
# Null hypothesis probability = 1.116433e-02
# Null hypothesis probability = 3.969750e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.32340 ( -0.550159 0.803046 )
Norm@50keV : 6.22823E-04 ( -0.000377911 0.000648492 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.76 using 59 PHA bins.
# Reduced chi-squared = 0.9782 for 57 degrees of freedom
# Null hypothesis probability = 5.218433e-01
Photon flux (15-150 keV) in 2.048 sec: 0.171263 ( -0.0742942 0.070645 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.91763e-08 ( -2.39854e-08 2.11575e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.68584 ( )
Epeak [keV] : 325.801 ( -330.098 -330.098 )
Norm@50keV : 7.54598E-04 ( -0.000742063 0.0137207 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.84 using 59 PHA bins.
# Reduced chi-squared = 0.9794 for 56 degrees of freedom
# Null hypothesis probability = 5.186544e-01
Photon flux (15-150 keV) in 2.048 sec: 0.173334 ( -0.0987146 0.069479 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.94975 -4.94975 )
beta : 0.926754 ( -0.525017 1.31106 )
Epeak [keV] : 206.850 ( -197.144 683.335 )
Norm@50keV : 1.67024E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.83 using 59 PHA bins.
# Reduced chi-squared = 0.9968 for 55 degrees of freedom
# Null hypothesis probability = 4.812405e-01
Photon flux (15-150 keV) in 2.048 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] : 198.019 ( )
R^2/D10^2 : 1.08340E-04 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.12 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 57 degrees of freedom
# Null hypothesis probability = 4.705075e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.72 using 59 PHA bins.
# Reduced chi-squared = 1.434 for 57 degrees of freedom
# Null hypothesis probability = 1.756905e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.363 ( )
R1^2/D10^2 : 1.09701E-04 (-3.64858e-05 0.000353722)
kT2 [keV] : 10.0000 (-10 -10)
R2^2/D10^2 : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.72 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.10 using 59 PHA bins.
# Reduced chi-squared = 1.486 for 55 degrees of freedom
# Reduced chi-squared = 1.038 for 55 degrees of freedom
# Null hypothesis probability = 1.116433e-02
# Null hypothesis probability = 3.969750e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sat Oct 12 12:01:22 EDT 2013