batgrbproduct Analysis for Trigger=555096
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 May 4 14:35:30 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger555096/GCN5_download_cron
======================================================================
Trigger: 00555096 Segment: 000
BAT Trigger Time: 389325944.832 [s; MET]
Trigger Stop: 389325946.24 [s; MET]
UTC: 2013-05-04T02:05:34.317800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 272.364553349823 Dec: -16.3442262783641 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.07
Image Trigger?: NO
Rate S/N Ratio: 10.4403065089106 [ if not an image trigger ]
Image S/N Ratio: 7.07
Flight Position: [ source = BAT ]
RA: 272.364553349823 Dec: -16.3442262783641 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 272.459473914862 Dec: -16.321018081852 [deg; J2000]
{ 18h 09m 50.3s , -16d 19' 15.7" }
+/- 1.30853453904629 [arcmin] (estimated 90% radius based on SNR)
+/- 0.475196515808768 [arcmin] (formal 1-sigma fit error)
SNR: 20.7148786581934
Angular difference between Flight and Ground position is 5.640007 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 120.03200006485 +/- 25.3356602599086
Measured from: -28.3119999170303
to: 91.7200001478195 [s; relative to TRIGTIME]
T50: 38.3520000576973 +/- 16.5412028626388
Measured from: -12.3759999275208
to: 25.9760001301765 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0200000405311584
to: 0.979999959468842 [s; relative to TRIGTIME]
Total Fluence
Measured from: -31.0640000104904
to: 99.62399995327 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.668507 0.727202 0.565006 0.079583
0.078849 0.070149 0.058618 0.049744 [error]
Peak 0.032353 0.045910 0.020529 0.013644
0.007224 0.006708 0.005576 0.004635 [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 1.82e-07 3.12e-07 4.09e-07 1.08e-06 1.20e-06 1.99e-06 erg/cm2
Error 3.01e-08 3.21e-08 5.64e-08 3.16e-07 1.35e-07 3.63e-07 erg/cm2
Peak flux Power-law 3.04e-01 2.87e-01 1.89e-01 1.93e-01 8.59e-01 9.74e-01 ph/cm2/s
Error 8.81e-02 5.32e-02 4.48e-02 9.21e-02 1.55e-01 1.75e-01 ph/cm2/s
Fluence Cutoff-PL 2.14e-07 5.31e-07 7.76e-07 7.85e-07 1.94e-06 2.31e-06 erg/cm2
Error 4.70e-08 5.58e-08 8.98e-08 6.21e-07 2.16e-07 6.49e-07 erg/cm2
Peak flux Cutoff-PL 2.83e-01 3.08e-01 1.92e-01 8.89e-02 8.40e-01 8.73e-01 ph/cm2/s
Error 9.82e-02 7.25e-02 5.21e-02 1.41e-01 1.61e-01 2.19e-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 1.612 0.176 - - 9.82e-04 1.03e-04 72.860 57
CPL 0.971 0.750 76.4 -27.6 2.12e-03 2.30e-03 70.310 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.603 0.308 - - 6.68e-03 1.25e-03 44.730 57
CPL 1.001 1.380 73.8 0.0 1.44e-02 8.63e-02 44.110 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: 63.296000 sec.
T50 in the 50-300 keV band: 33.984000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 130.688 -31.064 99.624
T90 120.032 -28.312 91.720
T50 38.352 -12.376 25.976
Peak 1.000 -0.020 0.980
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
272.4595 -16.3210 0.0093 13.9 -173.7 1.8789 20.7 TRIG_00555096
------------------------------------------
Foreground time interval of the image:
-31.064 20.569 (delta_t = 51.633 [sec])
Background time interval of the image:
-239.832 -31.064 (delta_t = 208.768 [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 -31.064 sec. to 99.624 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.61231 ( -0.175309 0.177245 )
Norm@50keV : 9.81712E-04 ( -0.000103065 0.000102263 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.86 using 59 PHA bins.
# Reduced chi-squared = 1.278 for 57 degrees of freedom
# Null hypothesis probability = 7.668420e-02
Photon flux (15-150 keV) in 130.7 sec: 0.126640 ( -0.0129092 0.0129359 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19821e-06 ( -1.33915e-07 1.3558e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -31.064 sec. to 99.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.970519 ( -0.819083 0.681155 )
Epeak [keV] : 76.3654 ( -21.2595 -76.3654 )
Norm@50keV : 2.12381E-03 ( -0.00116536 0.00342707 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.31 using 59 PHA bins.
# Reduced chi-squared = 1.255 for 56 degrees of freedom
# Null hypothesis probability = 9.456225e-02
Photon flux (15-150 keV) in 130.7 sec: 0.122655 ( -0.013626 0.013609 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.93887e-06 ( -2.14936e-07 2.17746e-07 ) ergs/cm2
Band function
Time interval is from -31.064 sec. to 99.624 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.970463 ( -0.612421 0.762345 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 76.3522 ( -32.3754 -76.3522 )
Norm@50keV : 2.12377E-03 ( -0.00114072 0.00343027 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.31 using 59 PHA bins.
# Reduced chi-squared = 1.278 for 55 degrees of freedom
# Null hypothesis probability = 8.003877e-02
Photon flux (15-150 keV) in 130.7 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] : 13.8339 (-1.63677 1.89553)
R^2/D10^2 : 1.85315E-02 (-0.00685661 0.0107173)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.24 using 59 PHA bins.
# Reduced chi-squared = 1.530 for 57 degrees of freedom
# Null hypothesis probability = 6.116940e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.802e-08 1.802e-08
25- 50 3.602e-07 5.130e-08
50-150 4.511e-07 9.639e-08
15-150 9.094e-07 1.295e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 157.562 (-57.9814 -157.415)
Norm : 0.522755 (-0.057624 0.0693126)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.77 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 57 degrees of freedom
# Null hypothesis probability = 1.038193e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.747e-07 5.153e-08
25- 50 3.261e-07 1.235e-07
50-150 6.567e-07 3.723e-07
15-150 1.158e-06 5.984e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.65203 (-1.67621 2.65611)
R1^2/D10^2 : 0.260764 (-0.188794 0.791409)
kT2 [keV] : 19.9398 (-3.94392 8.41203)
R2^2/D10^2 : 4.12938E-03 (-0.00309444 0.0056265)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.35 using 59 PHA bins.
# Reduced chi-squared = 1.261 for 55 degrees of freedom
# Null hypothesis probability = 9.220371e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.735e-07 8.714e-08
25- 50 3.212e-07 1.645e-07
50-150 6.148e-07 2.884e-07
15-150 1.110e-06 4.376e-07
Peak spectrum fit
Power-law model
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60317 ( -0.305343 0.310196 )
Norm@50keV : 6.68044E-03 ( -0.00126322 0.00124503 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.73 using 59 PHA bins.
# Reduced chi-squared = 0.7848 for 57 degrees of freedom
# Null hypothesis probability = 8.810060e-01
Photon flux (15-150 keV) in 1 sec: 0.859313 ( -0.155132 0.155463 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.24518e-08 ( -1.24664e-08 1.27381e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00120 ( -1.89016 0.869917 )
Epeak [keV] : 73.8377 ( -73.8942 -73.8942 )
Norm@50keV : 1.44281E-02 ( -0.0088273 0.163758 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.11 using 59 PHA bins.
# Reduced chi-squared = 0.7877 for 56 degrees of freedom
# Null hypothesis probability = 8.750145e-01
Photon flux (15-150 keV) in 1 sec: 0.839851 ( -0.161552 0.160929 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.85478e-08 ( -1.52109e-08 1.50987e-08 ) ergs/cm2
Band function
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.72035 ( -12.0172 -4.72035 )
beta : -1.99441 ( -0.611421 0.458523 )
Epeak [keV] : 31.1239 ( -11.9358 13.5874 )
Norm@50keV : 142.123 ( -24.7944 5125.95 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.70 using 59 PHA bins.
# Reduced chi-squared = 0.7581 for 55 degrees of freedom
# Null hypothesis probability = 9.070862e-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] : 11.7452 (-2.2317 3.03147)
R^2/D10^2 : 0.231595 (-0.132353 0.273579)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.48 using 59 PHA bins.
# Reduced chi-squared = 0.8505 for 57 degrees of freedom
# Null hypothesis probability = 7.819287e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.743e-09 2.472e-09
25- 50 2.069e-08 5.590e-09
50-150 1.691e-08 7.039e-09
15-150 4.434e-08 1.197e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 166.431 (-92.2967 -164.721)
Norm : 3.53387 (-0.656339 0.958259)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.18 using 59 PHA bins.
# Reduced chi-squared = 0.7751 for 57 degrees of freedom
# Null hypothesis probability = 8.926481e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.988e-09 4.997e-09
25- 50 1.690e-08 9.345e-09
50-150 3.477e-08 2.035e-08
15-150 6.066e-08 3.430e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.73115 (-2.58688 2.91432)
R1^2/D10^2 : 0.560736 (-0.306789 1.00702)
kT2 [keV] : 44.5670 (-35.2883 -54.5901)
R2^2/D10^2 : 1.50091E-03 (-0.000851578 0.025047)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.01 using 59 PHA bins.
# Reduced chi-squared = 0.7456 for 55 degrees of freedom
# Null hypothesis probability = 9.196626e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.542e-09 4.974e-09
25- 50 1.908e-08 1.112e-08
50-150 3.284e-08 1.789e-08
15-150 6.046e-08 3.141e-08
Plot creation:
Sat May 4 14:50:57 EDT 2013