batgrbproduct Analysis for Trigger=556930
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): Thu May 30 00:58:01 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger556930/GCN5_download_cron
======================================================================
Trigger: 00556930 Segment: 000
BAT Trigger Time: 391518936 [s; MET]
Trigger Stop: 391519000 [s; MET]
UTC: 2013-05-29T11:15:25.388600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 24.2588443927767 Dec: -64.1383871612738 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.22
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.22
Flight Position: [ source = BAT ]
RA: 24.2588443927767 Dec: -64.1383871612738 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 24.2738547423409 Dec: -64.1429898834676 [deg; J2000]
{ 01h 37m 05.7s , -64d 08' 34.8" }
+/- 1.91018237059934 [arcmin] (estimated 90% radius based on SNR)
+/- 0.733167180736663 [arcmin] (formal 1-sigma fit error)
SNR: 12.0665441118062
Angular difference between Flight and Ground position is 0.480179 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 128.771999955177 +/- 34.6375724398314
Measured from: 8.67200011014938
to: 137.444000065327 [s; relative to TRIGTIME]
T50: 32.6519999504089 +/- 15.2295703162733
Measured from: 55.0600001215935
to: 87.7120000720024 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 64.2760000228882
to: 65.2760000228882 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.0159999728203
to: 150.620000004768 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.768335 0.852290 0.680629 0.200765
0.072144 0.074589 0.066275 0.058305 [error]
Peak 0.017462 0.022846 0.016770 0.006436
0.005871 0.006187 0.005465 0.004873 [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 1.98e-07 3.52e-07 4.79e-07 1.35e-06 1.39e-06 2.38e-06 erg/cm2
Error 2.93e-08 3.24e-08 6.38e-08 3.79e-07 1.51e-07 4.34e-07 erg/cm2
Peak flux Power-law 1.41e-01 1.52e-01 1.16e-01 1.45e-01 4.63e-01 5.53e-01 ph/cm2/s
Error 6.75e-02 4.61e-02 4.32e-02 1.14e-01 1.33e-01 1.69e-01 ph/cm2/s
Fluence Cutoff-PL 1.95e-07 3.59e-07 4.81e-07 1.02e-06 1.36e-06 2.06e-06 erg/cm2
Error 2.47e-08 3.98e-08 6.58e-08 6.77e-07 1.72e-07 6.94e-07 erg/cm2
Peak flux Cutoff-PL 1.37e-01 1.56e-01 1.17e-01 1.04e-01 4.59e-01 5.14e-01 ph/cm2/s
Error 7.18e-02 5.71e-02 4.83e-02 9.71e-02 1.36e-01 1.93e-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 1.556 0.166 - - 8.90e-04 8.74e-05 50.730 57
CPL 1.403 0.490 182.1 0.0 1.07e-03 8.70e-04 50.550 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.387 0.512 - - 3.81e-03 1.14e-03 67.620 57
CPL 1.160 2.147 168.5 0.0 5.09e-03 1.16e-01 67.570 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: 52.736000 sec.
T50 in the 50-300 keV band: 21.760000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 165.636 -15.016 150.620
T90 128.772 8.672 137.444
T50 32.652 55.060 87.712
Peak 1.000 64.276 65.276
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
24.2739 -64.1430 0.0159 9.5 -127.0 1.4028 12.1 TRIG_00556930
------------------------------------------
Foreground time interval of the image:
-15.016 71.401 (delta_t = 86.417 [sec])
Background time interval of the image:
-239.000 -15.016 (delta_t = 223.984 [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 -15.016 sec. to 150.620 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55559 ( -0.164277 0.166885 )
Norm@50keV : 8.89733E-04 ( -8.78864e-05 8.68276e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.73 using 59 PHA bins.
# Reduced chi-squared = 0.8900 for 57 degrees of freedom
# Null hypothesis probability = 7.078570e-01
Photon flux (15-150 keV) in 165.6 sec: 0.112818 ( -0.0102716 0.0102752 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38597e-06 ( -1.5002e-07 1.52398e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.016 sec. to 150.620 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40335 ( -0.670815 0.308823 )
Epeak [keV] : 182.124 ( -182.161 -182.161 )
Norm@50keV : 1.07452E-03 ( -0.000395313 0.00134488 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.55 using 59 PHA bins.
# Reduced chi-squared = 0.9026 for 56 degrees of freedom
# Null hypothesis probability = 6.806079e-01
Photon flux (15-150 keV) in 165.6 sec: 0.112021 ( -0.010748 0.0107 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36382e-06 ( -1.74935e-07 1.69535e-07 ) ergs/cm2
Band function
Time interval is from -15.016 sec. to 150.620 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.62632 ( -4.62632 -4.62632 )
beta : -1.65605 ( -0.207101 0.190553 )
Epeak [keV] : 24.3006 ( -7.77621 4.37301 )
Norm@50keV : 62.6982 ( -5.65748 557541 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.85 using 59 PHA bins.
# Reduced chi-squared = 0.8882 for 55 degrees of freedom
# Null hypothesis probability = 7.073340e-01
Photon flux (15-150 keV) in 165.6 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] : 13.4215 (-1.65042 1.91365)
R^2/D10^2 : 1.83463E-02 (-0.00685087 0.0109011)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.21 using 59 PHA bins.
# Reduced chi-squared = 1.425 for 57 degrees of freedom
# Null hypothesis probability = 1.927839e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.160e-07 2.166e-08
25- 50 4.131e-07 4.827e-08
50-150 4.791e-07 1.013e-07
15-150 1.008e-06 1.139e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 197.571 (-80.305 -197.288)
Norm : 0.458938 (-0.0418949 0.0465353)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.66 using 59 PHA bins.
# Reduced chi-squared = 0.8888 for 57 degrees of freedom
# Null hypothesis probability = 7.103298e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.895e-07 1.042e-07
25- 50 3.641e-07 1.941e-07
50-150 7.961e-07 4.151e-07
15-150 1.350e-06 6.732e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.07964 (-1.39873 1.8126)
R1^2/D10^2 : 0.202825 (-0.118666 0.331601)
kT2 [keV] : 24.0600 (-5.35918 11.2502)
R2^2/D10^2 : 1.90097E-03 (-0.00138135 0.00214223)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.18 using 59 PHA bins.
# Reduced chi-squared = 0.8942 for 55 degrees of freedom
# Null hypothesis probability = 6.954062e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.004e-07 8.739e-08
25- 50 3.520e-07 1.216e-07
50-150 7.910e-07 4.045e-07
15-150 1.343e-06 4.975e-07
Peak spectrum fit
Power-law model
Time interval is from 64.276 sec. to 65.276 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38682 ( -0.513729 0.511241 )
Norm@50keV : 3.81291E-03 ( -0.00114694 0.00112466 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.62 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 57 degrees of freedom
# Null hypothesis probability = 1.586454e-01
Photon flux (15-150 keV) in 1 sec: 0.462973 ( -0.133074 0.133198 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.69432e-08 ( -1.21858e-08 1.27527e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 64.276 sec. to 65.276 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15952 ( -2.80302 1.49028 )
Epeak [keV] : 168.452 ( -169.395 -169.395 )
Norm@50keV : 5.08788E-03 ( -0.00240047 0.229277 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.57 using 59 PHA bins.
# Reduced chi-squared = 1.207 for 56 degrees of freedom
# Null hypothesis probability = 1.383655e-01
Photon flux (15-150 keV) in 1 sec: 0.458901 ( -0.13703 0.135931 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.59507e-08 ( -1.48632e-08 1.35542e-08 ) ergs/cm2
Band function
Time interval is from 64.276 sec. to 65.276 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95305 ( -4.95305 -4.95305 )
beta : -1.73984 ( -1.01781 0.663181 )
Epeak [keV] : 29.2156 ( -29.2156 34.5612 )
Norm@50keV : 152.231 ( -42.3367 1.89371e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.70 using 59 PHA bins.
# Reduced chi-squared = 1.195 for 55 degrees of freedom
# Null hypothesis probability = 1.530499e-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] : 12.6510 (-4.10471 7.96821)
R^2/D10^2 : 9.53462E-02 (-0.0948266 0.288228)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.26 using 59 PHA bins.
# Reduced chi-squared = 1.233 for 57 degrees of freedom
# Null hypothesis probability = 1.116212e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.236e-09 2.052e-09
25- 50 1.082e-08 6.635e-09
50-150 1.077e-08 7.783e-09
15-150 2.482e-08 1.567e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.358 (-199.363 -199.363)
Norm : 1.89548 (-0.543193 0.543677)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.76 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 57 degrees of freedom
# Null hypothesis probability = 1.557692e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.720e-09 2.906e-09
25- 50 9.079e-09 5.515e-09
50-150 1.991e-08 1.198e-08
15-150 3.371e-08 2.059e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.42782 (-3.80642 5.46513)
R1^2/D10^2 : 0.316592 (-0.256615 1.85867)
kT2 [keV] : 50.4991 (-35.0284 -50.491)
R2^2/D10^2 : 8.72406E-04 (-0.000848194 0.037652)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.10 using 59 PHA bins.
# Reduced chi-squared = 1.202 for 55 degrees of freedom
# Null hypothesis probability = 1.451600e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.456e-09 2.777e-09
25- 50 9.805e-09 5.810e-09
50-150 2.405e-08 1.324e-08
15-150 3.831e-08 1.883e-08
Plot creation:
Thu May 30 01:11:34 EDT 2013