batgrbproduct Analysis for Trigger=544381
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 Dec 30 10:50:47 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger544381/GCN5_download_cron
======================================================================
Trigger: 00544381 Segment: 000
BAT Trigger Time: 378478321.728 [s; MET]
Trigger Stop: 378478322.752 [s; MET]
UTC: 2012-12-29T12:51:51.688260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 185.493178429073 Dec: -47.9278586259232 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.79
Image Trigger?: NO
Rate S/N Ratio: 16.2480768092719 [ if not an image trigger ]
Image S/N Ratio: 6.79
Flight Position: [ source = BAT ]
RA: 185.493178429073 Dec: -47.9278586259232 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 185.569202525963 Dec: -47.9604474787024 [deg; J2000]
{ 12h 22m 16.6s , -47d 57' 37.6" }
+/- 4.27336444984755 [arcmin] (estimated 90% radius based on SNR)
+/- 2.4100500692667 [arcmin] (formal 1-sigma fit error)
SNR: 3.81960520073106
Angular difference between Flight and Ground position is 3.627593 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: 2.98023223876953e-08
to: 1.02400001883507 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.003394 0.002182 0.024683 0.026385
0.005739 0.006256 0.005860 0.006495 [error]
Peak 0.003394 0.002182 0.024683 0.026385
0.005739 0.006256 0.005860 0.006495 [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 3.68e-11 5.38e-10 7.24e-09 8.52e-07 3.58e-08 8.59e-07 erg/cm2
Error 4.72e-10 2.17e-09 8.23e-09 3.26e-07 2.46e-08 3.29e-07 erg/cm2
Peak flux Power-law 1.08e-03 8.23e-03 5.54e-02 1.98e+00 1.98e-01 2.04e+00 ph/cm2/s
Error 1.44e-02 3.53e-02 7.54e-02 7.74e-01 1.69e-01 8.09e-01 ph/cm2/s
Fluence Cutoff-PL 2.01e-10 1.69e-09 1.27e-08 5.49e-07 5.62e-07 0.00e+00 erg/cm2
Error 4.72e-10 2.17e-09 9.75e-09 3.78e-06 6.44e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 6.93e-04 6.08e-03 4.78e-02 2.19e+00 1.82e-01 2.25e+00 ph/cm2/s
Error 1.44e-02 3.53e-02 7.54e-02 3.15e+00 1.70e-01 4.51e+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 -0.979 1.154 - - 1.30e-03 1.42e-03 55.210 57
CPL -0.915 1.633 9999.4 0.0 1.42e-03 7.03e-03 55.230 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.979 1.154 - - 1.30e-03 1.42e-03 55.210 57
CPL -0.915 1.633 9999.4 0.0 1.42e-03 7.05e-03 55.230 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: 18.816000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
185.5692 -47.9604 0.0502 4.0 116.2 0.0461 3.8 TRIG_00544381
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.728 -9.728 (delta_t = 51.000 [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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.978771 ( -1.24704 1.06059 )
Norm@50keV : 1.29712E-03 ( -0.00129662 0.00155036 )
------------------------------------------------------------
# Chi-Squared = 55.21 using 59 PHA bins.
# Reduced chi-squared = 0.9686 for 57 degrees of freedom
# Null hypothesis probability = 5.425842e-01
Photon flux (15-150 keV) in 1.024 sec: 0.198092 ( -0.126417 0.210888 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.58049e-08 ( -2.23358e-08 2.68765e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.915004 ( -2.27932 0.986335 )
Epeak [keV] : 9999.36 ( -9999.64 -9999.64 )
Norm@50keV : 1.42455E-03 ( -0.000453468 0.0135995 )
------------------------------------------------------------
# Chi-Squared = 55.23 using 59 PHA bins.
# Reduced chi-squared = 0.9863 for 56 degrees of freedom
# Null hypothesis probability = 5.039664e-01
Photon flux (15-150 keV) in 1.024 sec: 0.182158 ( -0.114922 0.225976 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.61882e-07 ( -5.61882e-07 7.26105e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.201536 ( -0.201941 -0.201941 )
beta : 0.979085 ( -1.06073 1.24664 )
Epeak [keV] : 16.4730 ( -16.4709 -16.4709 )
Norm@50keV : 2.50013E-03 ( -0.00249994 527.634 )
------------------------------------------------------------
# Chi-Squared = 55.21 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 55 degrees of freedom
# Null hypothesis probability = 4.667540e-01
Photon flux (15-150 keV) in 1.024 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] : 99.2491 ( )
R^2/D10^2 : 4.68690E-04 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 55.95 using 59 PHA bins.
# Reduced chi-squared = 0.9815 for 57 degrees of freedom
# Null hypothesis probability = 5.146030e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.987e-10 6.282e-10
25- 50 1.116e-10 1.043e-10
50-150 1.234e-13 7.311e-14
15-150 1.010e-09 5.253e-10
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 ( )
Norm : 0.776313 (-0.565694 0.568387)
------------------------------------------------------------
# Chi-Squared = 74.19 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 57 degrees of freedom
# Null hypothesis probability = 6.262994e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.760e-10 9.021e-10
25- 50 1.703e-10 1.083e-10
50-150 2.254e-12 6.615e-12
15-150 1.048e-09 7.982e-10
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.12886 (-2.07201 15.0756)
R1^2/D10^2 : 36.4700 ( )
kT2 [keV] : 197.013 (-125.272 -125.272)
R2^2/D10^2 : 1.72364E-04 (-5.61555e-05 0.00138848)
------------------------------------------------------------
# Chi-Squared = 55.15 using 59 PHA bins.
# Chi-Squared = 55.13 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 55 degrees of freedom
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.688797e-01
# Null hypothesis probability = 4.696345e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.687e-10 1.256e-10
25- 50 1.907e-09 6.523e-10
50-150 4.559e-08 1.643e-08
15-150 4.827e-08 1.975e-08
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.978771 ( -1.24704 1.06059 )
Norm@50keV : 1.29712E-03 ( -0.00129662 0.00155036 )
------------------------------------------------------------
# Chi-Squared = 55.21 using 59 PHA bins.
# Reduced chi-squared = 0.9686 for 57 degrees of freedom
# Null hypothesis probability = 5.425842e-01
Photon flux (15-150 keV) in 1.024 sec: 0.198092 ( -0.126417 0.210888 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.58049e-08 ( -2.23358e-08 2.68765e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.915004 ( -2.27932 0.986335 )
Epeak [keV] : 9999.36 ( -9999.64 -9999.64 )
Norm@50keV : 1.42455E-03 ( -0.000453468 0.0136565 )
------------------------------------------------------------
# Chi-Squared = 55.23 using 59 PHA bins.
# Reduced chi-squared = 0.9863 for 56 degrees of freedom
# Null hypothesis probability = 5.039664e-01
Photon flux (15-150 keV) in 1.024 sec: 0.182158 ( -0.114922 0.225976 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.61882e-07 ( -5.61882e-07 7.26105e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.201536 ( -0.201941 -0.201941 )
beta : 0.979085 ( -1.06073 1.24664 )
Epeak [keV] : 16.4730 ( -16.4709 -16.4709 )
Norm@50keV : 2.50013E-03 ( -0.00249994 527.634 )
------------------------------------------------------------
# Chi-Squared = 55.21 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 55 degrees of freedom
# Null hypothesis probability = 4.667540e-01
Photon flux (15-150 keV) in 1.024 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] : 99.2491 ( )
R^2/D10^2 : 4.68690E-04 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 55.95 using 59 PHA bins.
# Reduced chi-squared = 0.9815 for 57 degrees of freedom
# Null hypothesis probability = 5.146030e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.987e-10 4.324e-10
25- 50 1.116e-10 8.556e-11
50-150 1.234e-13 2.429e-14
15-150 1.010e-09 4.539e-10
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 ( )
Norm : 0.776313 (-0.565694 0.568387)
------------------------------------------------------------
# Chi-Squared = 74.19 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 57 degrees of freedom
# Null hypothesis probability = 6.262994e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.760e-10 2.961e-10
25- 50 1.703e-10 1.524e-10
50-150 2.254e-12 1.617e-12
15-150 1.048e-09 7.071e-10
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.12886 (-2.07201 15.0756)
R1^2/D10^2 : 36.4700 ( )
kT2 [keV] : 197.013 (-125.272 -125.272)
R2^2/D10^2 : 1.72364E-04 (-5.61555e-05 0.00138848)
------------------------------------------------------------
# Chi-Squared = 55.15 using 59 PHA bins.
# Chi-Squared = 55.13 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 55 degrees of freedom
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.688797e-01
# Null hypothesis probability = 4.696345e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.687e-10 1.338e-10
25- 50 1.907e-09 7.675e-10
50-150 4.559e-08 1.948e-08
15-150 4.827e-08 1.718e-08
Plot creation:
Sun Dec 30 11:00:30 EST 2012