batgrbproduct Analysis for Trigger=552384
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): Wed Apr 3 12:19:45 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger552384/batgroup_hand_proc
======================================================================
Trigger: 00552384 Segment: 000
BAT Trigger Time: 386360288 [s; MET]
Trigger Stop: 386360352 [s; MET]
UTC: 2013-03-30T18:17:57.616600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 136.0032378736 Dec: -40.9833434124791 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 13.05
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 13.05
Flight Position: [ source = BAT ]
RA: 136.0032378736 Dec: -40.9833434124791 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 135.986188252511 Dec: -41.0083600902912 [deg; J2000]
{ 09h 03m 56.7s , -41d 00' 30.1" }
+/- 2.24751270569344 [arcmin] (estimated 90% radius based on SNR)
+/- 0.852785506184144 [arcmin] (formal 1-sigma fit error)
SNR: 9.56503864819112
Angular difference between Flight and Ground position is 1.687940 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 114.507999897003 +/- 49.4493173192463
Measured from: 43.660000026226
to: 158.167999923229 [s; relative to TRIGTIME]
T50: 32.8959999680519 +/- 14.0845641867977
Measured from: 70.5199999809265
to: 103.415999948978 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 97.2799999713898
to: 98.2799999713898 [s; relative to TRIGTIME]
Total Fluence
Measured from: 36.1999999880791
to: 204.98400002718 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.897800 0.974093 0.061734 0.033827
0.083453 0.081161 0.070340 0.061861 [error]
Peak 0.030224 0.018324 0.006066 0.008254
0.005637 0.005448 0.004600 0.004069 [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 5.54e-07 3.79e-07 1.70e-07 1.06e-07 1.15e-06 1.21e-06 erg/cm2
Error 5.17e-08 4.22e-08 3.99e-08 4.39e-08 1.11e-07 1.30e-07 erg/cm2
Peak flux Power-law 2.76e-01 1.40e-01 4.40e-02 1.77e-02 4.70e-01 4.78e-01 ph/cm2/s
Error 8.39e-02 4.90e-02 3.20e-02 2.62e-02 1.24e-01 1.29e-01 ph/cm2/s
Fluence Cutoff-PL 5.52e-07 3.93e-07 2.14e-08 9.66e-07 0.00e+00 0.00e+00 erg/cm2
Error 5.76e-08 5.61e-08 9.00e-08 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.78e-01 1.39e-01 4.27e-02 1.67e-02 4.68e-01 4.76e-01 ph/cm2/s
Error 8.37e-02 5.32e-02 3.57e-02 1.95e-02 1.24e-01 1.28e-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 3.156 0.208 - - 5.28e-04 9.33e-05 0.000 57
CPL -1.162 2.201 19.5 2.5 7.57e-01 0.00e+00 0.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.672 0.727 - - 2.15e-03 1.19e-03 0.000 57
CPL 1.927 0.000 3.2 0.0 6.72e-03 0.00e+00 0.000 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 168.784 36.200 204.984
T90 114.508 43.660 158.168
T50 32.896 70.520 103.416
Peak 1.000 97.280 98.280
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
135.9862 -41.0084 0.0200 0.1459 -160.1050 1.3685828 9.565 TRIG_00552384
Foreground time interval of the image:
36.200 122.301 (delta_t = 86.101 [sec])
Background time interval of the image:
-14.499 36.200 (delta_t = 50.699 [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 36.200 sec. to 204.984 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.15624 ( -0.201956 0.214649 )
Norm@50keV : 5.27795E-04 ( -9.09507e-05 9.55539e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.97 using 59 PHA bins.
# Reduced chi-squared = 1.280 for 57 degrees of freedom
# Null hypothesis probability = 7.539997e-02
Photon flux (15-150 keV) in 168.8 sec: 0.162986 ( -0.0133104 0.0133104 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15494e-06 ( -1.09494e-07 1.12622e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 36.200 sec. to 204.984 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.16170 ( -2.98747 1.4144 )
Epeak [keV] : 19.5230 ( -2.03871 3.00234 )
Norm@50keV : 0.757420 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.77 using 59 PHA bins.
# Reduced chi-squared = 0.8709 for 56 degrees of freedom
# Null hypothesis probability = 7.425131e-01
Photon flux (15-150 keV) in 168.8 sec: 0.153478 ( -0.013371 0.013348 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.65907e-07 ( -8.80478e-08 9.20416e-08 ) ergs/cm2
Band function
Time interval is from 36.200 sec. to 204.984 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.61782 ( -1.25188 -0.954067 )
beta : -5.69324 ( 5.60045 1.53496 )
Epeak [keV] : 20.0380 ( -2.91722 1.80634 )
Norm@50keV : 1.69165 ( -1.46855 310.719 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.22 using 59 PHA bins.
# Reduced chi-squared = 0.8767 for 55 degrees of freedom
# Null hypothesis probability = 7.294444e-01
Photon flux (15-150 keV) in 168.8 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] : 5.18132 (-0.374344 0.40543)
R^2/D10^2 : 1.16360 (-0.35648 0.519074)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.69 using 59 PHA bins.
# Reduced chi-squared = 0.8542 for 57 degrees of freedom
# Null hypothesis probability = 7.753122e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.497e-07 6.541e-08
25- 50 3.916e-07 5.452e-08
50-150 1.886e-08 8.144e-09
15-150 9.601e-07 1.020e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.5656 (-2.24189 2.63858)
Norm : 2.75054 (-0.574655 0.732995)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.68 using 59 PHA bins.
# Reduced chi-squared = 0.9769 for 57 degrees of freedom
# Null hypothesis probability = 5.245333e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.629e-07 6.305e-08
25- 50 3.976e-07 4.904e-08
50-150 7.544e-08 2.984e-08
15-150 1.036e-06 9.731e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.10739 (-5.10212 0.440283)
R1^2/D10^2 : 1.23257 (-0.40323 1.56588)
kT2 [keV] : 31.1789 (-28.6466 -28.6466)
R2^2/D10^2 : 7.12643E-05 (-9.28405e-05 0.0112729)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.99 using 59 PHA bins.
# Reduced chi-squared = 0.8726 for 55 degrees of freedom
# Null hypothesis probability = 7.371852e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.523e-07 8.339e-08
25- 50 3.899e-07 7.275e-08
50-150 9.266e-08 5.169e-08
15-150 1.035e-06 1.593e-07
Peak spectrum fit
Power-law model
Time interval is from 97.280 sec. to 98.280 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.67243 ( -0.61216 0.841361 )
Norm@50keV : 2.14656E-03 ( -0.0011713 0.00121574 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.57 using 59 PHA bins.
# Reduced chi-squared = 0.9048 for 57 degrees of freedom
# Null hypothesis probability = 6.780301e-01
Photon flux (15-150 keV) in 1 sec: 0.470446 ( -0.123929 0.124353 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.262e-08 ( -7.99652e-09 9.06397e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 97.280 sec. to 98.280 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92710 ( )
Epeak [keV] : 3.20384 ( )
Norm@50keV : 6.71532E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.09 using 59 PHA bins.
# Reduced chi-squared = 0.9302 for 56 degrees of freedom
# Null hypothesis probability = 6.234771e-01
Photon flux (15-150 keV) in 1 sec: 0.468186 ( -0.12231 0.124974 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.22967e-08 ( -7.9303e-09 9.1233e-09 ) ergs/cm2
Band function
Time interval is from 97.280 sec. to 98.280 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.86155 ( 1.85834 1.85834 )
beta : -2.67110 ( 2.67217 0.611787 )
Epeak [keV] : 2.10334 ( -2.10878 9997.38 )
Norm@50keV : 1.50200E-02 ( -0.015923 3.15255e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.57 using 59 PHA bins.
# Reduced chi-squared = 0.9377 for 55 degrees of freedom
# Null hypothesis probability = 6.062877e-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] : 6.41499 (-2.12816 2.34255)
R^2/D10^2 : 1.26141 (-1.25466 6.0369)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.52 using 59 PHA bins.
# Reduced chi-squared = 0.9740 for 57 degrees of freedom
# Null hypothesis probability = 5.308664e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.547e-09 4.530e-09
25- 50 8.675e-09 5.465e-09
50-150 1.037e-09 8.465e-10
15-150 1.726e-08 1.039e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.3394 (-11.9984 29.0466)
Norm : 4.55088 (-2.18125 5.44985)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.51 using 59 PHA bins.
# Reduced chi-squared = 0.9213 for 57 degrees of freedom
# Null hypothesis probability = 6.439441e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.189e-09 3.780e-09
25- 50 8.248e-09 4.161e-09
50-150 3.371e-09 2.811e-09
15-150 1.981e-08 9.111e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.40590 (-2.01512 6.19511)
R1^2/D10^2 : 95.6074 (-205.916 -208.83)
kT2 [keV] : 9.10121 (-2.94166 -8.78191)
R2^2/D10^2 : 0.226873 (-0.268866 1.35512)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.16 using 59 PHA bins.
# Reduced chi-squared = 0.9302 for 55 degrees of freedom
# Null hypothesis probability = 6.221685e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.630e-09 3.908e-09
25- 50 8.206e-09 4.926e-09
50-150 3.141e-09 2.520e-09
15-150 1.898e-08 1.034e-08
Plot creation:
Wed Apr 3 12:38:31 EDT 2013