batgrbproduct Analysis for Trigger=556587
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 25 04:11:31 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger556587/GCN5_download_cron
======================================================================
Trigger: 00556587 Segment: 000
BAT Trigger Time: 391132384 [s; MET]
Trigger Stop: 391132448 [s; MET]
UTC: 2013-05-24T23:52:53.405860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 244.986302710241 Dec: -15.6336175889865 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 15.13
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 15.13
Flight Position: [ source = BAT ]
RA: 244.986302710241 Dec: -15.6336175889865 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 244.985439180601 Dec: -15.634205161882 [deg; J2000]
{ 16h 19m 56.5s , -15d 38' 03.1" }
+/- 1.37809755954543 [arcmin] (estimated 90% radius based on SNR)
+/- 0.581624758360514 [arcmin] (formal 1-sigma fit error)
SNR: 19.2374278211055
Angular difference between Flight and Ground position is 0.061093 arcmin
Partial Coding Fraction: 0.078125 [ including projection effects ]
Duration
T90: 224 +/- 16
Measured from: -78.9999998807907
to: 145.000000119209 [s; relative to TRIGTIME]
T50: 112 +/- 16
Measured from: -14.9999998807907
to: 97.0000001192093 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 56.5
to: 57.5 [s; relative to TRIGTIME]
Total Fluence
Measured from: -79
to: 161 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 21.840129 2.377244 0.460130 -0.124175
0.385400 0.315715 0.264376 0.240409 [error]
Peak 0.137349 0.023576 -0.030910 -0.008738
0.028217 0.022184 0.018889 0.015548 [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 8.12e-06 1.24e-06 8.65e-08 6.45e-09 9.45e-06 9.45e-06 erg/cm2
Error 7.59e-07 1.76e-07 3.20e-08 4.15e-09 7.42e-07 7.42e-07 erg/cm2
Peak flux Power-law 1.56e+00 1.58e-01 6.56e-03 2.82e-04 1.73e+00 1.73e+00 ph/cm2/s
Error 5.37e-01 1.87e-01 2.25e-02 3.13e-03 6.49e-01 6.49e-01 ph/cm2/s
Fluence Cutoff-PL 8.00e-06 1.06e-06 1.20e-08 4.38e-12 9.07e-06 9.07e-06 erg/cm2
Error 8.08e-07 2.31e-07 3.84e-08 1.81e-09 8.32e-07 8.32e-07 erg/cm2
Peak flux Cutoff-PL 1.56e+00 1.58e-01 6.54e-03 2.80e-04 1.73e+00 1.72e+00 ph/cm2/s
Error 5.62e-01 1.87e-01 2.22e-02 1.89e-03 6.49e-01 6.50e-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 5.838 0.338 - - 3.71e-04 1.11e-04 81.180 57
CPL 1.000 0.000 50.0 0.0 5.90e-03 0.00e+00 460.930 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.595 2.077 - - 6.29e-04 1.55e-03 48.950 57
CPL 1.000 0.000 50.0 0.0 1.66e-02 0.00e+00 67.700 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 240.000 -79.000 161.000
T90 224.000 -79.000 145.000
T50 112.000 -15.000 97.000
Peak 1.000 56.500 57.500
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
244.9854 -15.6342 0.0100 38.4 79.5 19.6580 19.2 TRIG_00556587
------------------------------------------
Foreground time interval of the image:
-15.799 161.000 (delta_t = 176.799 [sec])
Background time interval of the image:
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 -79.000 sec. to 161.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.83828 ( -0.335133 0.340424 )
Norm@50keV : 3.71451E-04 ( -9.77111e-05 0.000123413 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.18 using 59 PHA bins.
# Reduced chi-squared = 1.424 for 57 degrees of freedom
# Null hypothesis probability = 1.937499e-02
Photon flux (15-150 keV) in 240 sec: 1.30022 ( -0.112902 0.114208 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.45101e-06 ( -7.38869e-07 7.45166e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -79.000 sec. to 161.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.90394E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 460.93 using 59 PHA bins.
# Reduced chi-squared = 8.2309 for 56 degrees of freedom
# Null hypothesis probability = 5.218509e-65
Photon flux (15-150 keV) in 240 sec: 1.25715 ( -0.12618 0.12407 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.07181e-06 ( -8.37768e-07 8.2596e-07 ) ergs/cm2
Band function
Time interval is from -79.000 sec. to 161.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.12888 ( 4.44269 7.12888 )
beta : -5.87097 ( -0.316816 0.361315 )
Epeak [keV] : 290.772 ( -290.772 -290.772 )
Norm@50keV : 4.90049E-02 ( -0.0124502 0.0176624 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.21 using 59 PHA bins.
# Reduced chi-squared = 1.477 for 55 degrees of freedom
# Null hypothesis probability = 1.231976e-02
Photon flux (15-150 keV) in 240 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] : 2.78854 (-0.180172 0.20085)
R^2/D10^2 : 273.545 (-113.859 192.961)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.75 using 59 PHA bins.
# Reduced chi-squared = 1.452 for 57 degrees of freedom
# Null hypothesis probability = 1.454869e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.681e-06 1.256e-06
25- 50 8.611e-07 1.482e-07
50-150 7.488e-10 4.267e-10
15-150 8.544e-06 1.304e-06
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.99479 (-0.469247 0.550362)
Norm : 286.391 (-100.606 156.206)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.59 using 59 PHA bins.
# Reduced chi-squared = 1.379 for 57 degrees of freedom
# Null hypothesis probability = 3.058961e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.907e-06 1.073e-06
25- 50 9.969e-07 1.748e-07
50-150 5.141e-09 2.711e-09
15-150 8.909e-06 1.136e-06
Double BB
R1^2/D10^2 : 20.1191 (-835.102 -1146.6)
kT2 [keV] : 2.03907 ( )
R2^2/D10^2 : 1891.84 (-1525.15 -1838.31)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.44 using 59 PHA bins.
#Fit statistic : Chi-Squared = 78.01 using 59 PHA bins.
#Fit statistic : Chi-Squared = 77.92 using 59 PHA bins.
# Reduced chi-squared = 1.444 for 55 degrees of freedom
# Reduced chi-squared = 1.418 for 55 degrees of freedom
# Reduced chi-squared = 1.417 for 55 degrees of freedom
# Null hypothesis probability = 1.720082e-02
# Null hypothesis probability = 2.234661e-02
# Null hypothesis probability = 2.270653e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.790e-06 1.415e-06
25- 50 9.725e-07 2.747e-07
50-150 3.768e-07 3.589e-07
15-150 9.139e-06 1.661e-06
Peak spectrum fit
Power-law model
Time interval is from 56.500 sec. to 57.500 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.59471 ( -1.61137 2.54306 )
Norm@50keV : 6.28566E-04 ( -0.000628566 0.0024678 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.95 using 59 PHA bins.
# Reduced chi-squared = 0.8587 for 57 degrees of freedom
# Null hypothesis probability = 7.672046e-01
Photon flux (15-150 keV) in 1 sec: 1.72794 ( -0.655916 0.642841 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.30615e-08 ( -2.24877e-08 2.41198e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 56.500 sec. to 57.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.66227E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.70 using 59 PHA bins.
# Reduced chi-squared = 1.209 for 56 degrees of freedom
# Null hypothesis probability = 1.359586e-01
Photon flux (15-150 keV) in 1 sec: 1.73054 ( -0.6604 0.63792 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.3265e-08 ( -2.27108e-08 2.38687e-08 ) ergs/cm2
Band function
Time interval is from 56.500 sec. to 57.500 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.73938 ( )
beta : -5.80868 ( )
Epeak [keV] : 1.57697 ( )
Norm@50keV : 6.73340E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.98 using 59 PHA bins.
# Reduced chi-squared = 0.8906 for 55 degrees of freedom
# Null hypothesis probability = 7.026519e-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] : 2.40681 (-0.793645 1.0578)
R^2/D10^2 : 1139.94 (-1165.6 29385.3)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.46 using 59 PHA bins.
# Reduced chi-squared = 0.8678 for 57 degrees of freedom
# Null hypothesis probability = 7.505811e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.723e-08 2.768e-08
25- 50 2.971e-09 2.073e-09
50-150 6.421e-13 9.200e-13
15-150 5.021e-08 2.920e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.44638 (-1.98647 4.0771)
Norm : 623.478 (-623.499 9589.21)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.23 using 59 PHA bins.
# Reduced chi-squared = 0.8637 for 57 degrees of freedom
# Null hypothesis probability = 7.580820e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.654e-08 2.596e-08
25- 50 4.454e-09 3.093e-09
50-150 1.234e-11 1.518e-11
15-150 5.100e-08 2.953e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.06744 ( )
R1^2/D10^2 : 0.838492 (-1.04707 -1.04707)
kT2 [keV] : 2.03944 (-2.01082 1.24528)
R2^2/D10^2 : 3494.37 (-3950.55 -3950.55)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.09 using 59 PHA bins.
#Fit statistic : Chi-Squared = 48.69 using 59 PHA bins.
# Reduced chi-squared = 0.8926 for 55 degrees of freedom
# Reduced chi-squared = 0.8852 for 55 degrees of freedom
# Null hypothesis probability = 6.986786e-01
# Null hypothesis probability = 7.131240e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.363e-08 1.805e-08
25- 50 6.210e-09 2.074e-09
50-150 2.550e-11 1.368e-11
15-150 4.987e-08 2.246e-08
Plot creation:
Tue May 28 18:49:09 EDT 2013