batgrbproduct Analysis for Trigger=534015
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 Sep 19 06:00:51 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger534015/GCN5_download_cron
======================================================================
Trigger: 00534015 Segment: 000
BAT Trigger Time: 369659780.288 [s; MET]
Trigger Stop: 369659781.312 [s; MET]
UTC: 2012-09-18T11:16:10.624900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 181.053946302635 Dec: -32.7576526591057 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.04
Image Trigger?: NO
Rate S/N Ratio: 21.51743479135 [ if not an image trigger ]
Image S/N Ratio: 12.04
Flight Position: [ source = BAT ]
RA: 181.053946302635 Dec: -32.7576526591057 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 181.042227323676 Dec: -32.7620843216046 [deg; J2000]
{ 12h 04m 10.1s , -32d 45' 43.5" }
+/- 1.13534265124236 [arcmin] (estimated 90% radius based on SNR)
+/- 0.462374398019885 [arcmin] (formal 1-sigma fit error)
SNR: 25.3726360351501
Angular difference between Flight and Ground position is 0.648337 arcmin
Partial Coding Fraction: 0.15625 [ including projection effects ]
Duration
T90: 25.0839999318123 +/- 2.5301067171395
Measured from: -1.85199987888336
to: 23.2320000529289 [s; relative to TRIGTIME]
T50: 8.65199995040894 +/- 0.716937944464138
Measured from: 0.728000104427338
to: 9.38000005483627 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.283999979496002
to: 0.716000020503998 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.86000001430511
to: 23.9000000357628 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.287188 1.870768 1.407861 0.251827
0.083493 0.086827 0.075842 0.061616 [error]
Peak 0.112668 0.213224 0.169597 0.056058
0.018264 0.019713 0.018448 0.013329 [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 4.64e-07 8.02e-07 1.06e-06 2.85e-06 3.09e-06 5.17e-06 erg/cm2
Error 4.23e-08 4.49e-08 7.27e-08 4.15e-07 1.77e-07 4.71e-07 erg/cm2
Peak flux Power-law 1.36e+00 1.47e+00 1.13e+00 1.43e+00 4.50e+00 5.39e+00 ph/cm2/s
Error 2.52e-01 1.72e-01 1.40e-01 3.55e-01 4.88e-01 5.76e-01 ph/cm2/s
Fluence Cutoff-PL 4.16e-07 8.48e-07 1.10e-06 1.32e-06 3.68e-06 0.00e+00 erg/cm2
Error 5.09e-08 5.42e-08 8.17e-08 6.16e-07 6.34e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.15e+00 1.57e+00 1.24e+00 7.12e-01 4.38e+00 4.66e+00 ph/cm2/s
Error 3.09e-01 2.03e-01 1.75e-01 5.01e-01 7.01e-01 0.00e+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 4.70e+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 1.600 0.091 - - 1.24e-02 6.65e-04 63.470 57
CPL 1.004 0.389 85.5 36.3 2.44e-02 1.11e-02 55.600 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.377 0.171 - - 3.71e-02 3.91e-03 53.490 57
CPL 0.593 0.800 96.4 210.6 8.80e-02 9.15e-02 50.090 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: 27.072000 sec.
T50 in the 50-300 keV band: 8.832000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 26.760 -2.860 23.900
T90 25.084 -1.852 23.232
T50 8.652 0.728 9.380
Peak 1.000 -0.284 0.716
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
181.0422 -32.7621 0.0076 37.6 -91.2 5.0090 25.4 TRIG_00534015
------------------------------------------
Foreground time interval of the image:
-2.860 23.900 (delta_t = 26.760 [sec])
Background time interval of the image:
-239.288 -233.718 (delta_t = 5.570 [sec])
-232.288 -231.598 (delta_t = 0.690 [sec])
-228.288 -2.860 (delta_t = 225.428 [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 -2.860 sec. to 23.900 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59955 ( -0.0908187 0.0914157 )
Norm@50keV : 1.23660E-02 ( -0.000666138 0.000664782 )
------------------------------------------------------------
# Chi-Squared = 63.47 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 57 degrees of freedom
# Null hypothesis probability = 2.589163e-01
Photon flux (15-150 keV) in 26.76 sec: 1.58887 ( -0.0879006 0.088073 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.09493e-06 ( -1.76473e-07 1.77066e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.860 sec. to 23.900 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00443 ( -0.406532 0.371508 )
Epeak [keV] : 85.4895 ( -16.6042 55.9545 )
Norm@50keV : 2.43623E-02 ( -0.00823362 0.0138867 )
------------------------------------------------------------
# Chi-Squared = 55.60 using 59 PHA bins.
# Reduced chi-squared = 0.9929 for 56 degrees of freedom
# Null hypothesis probability = 4.898320e-01
Photon flux (15-150 keV) in 26.76 sec: 1.54281 ( -0.09215 0.09226 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.68496e-06 ( -4.95675e-07 7.71678e-07 ) ergs/cm2
Band function
Time interval is from -2.860 sec. to 23.900 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.00446 ( -0.335189 0.455491 )
beta : -10.00000 ( 3.45473e+10 3.45473e+10 )
Epeak [keV] : 85.4788 ( -16.6075 55.9408 )
Norm@50keV : 2.43594E-02 ( -0.00823303 0.0138944 )
------------------------------------------------------------
# Chi-Squared = 55.60 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Null hypothesis probability = 4.518994e-01
Photon flux (15-150 keV) in 26.76 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] : 14.8004 ( )
R^2/D10^2 : 0.185368 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 119.98 using 59 PHA bins.
# Reduced chi-squared = 2.1050 for 57 degrees of freedom
# Null hypothesis probability = 2.192852e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.280e-07 2.319e-08
25- 50 8.946e-07 5.967e-08
50-150 1.326e-06 1.350e-07
15-150 2.448e-06 1.523e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 176.453 ( )
Norm : 6.50641 (-0.380363 0.417942)
------------------------------------------------------------
# Chi-Squared = 56.93 using 59 PHA bins.
# Reduced chi-squared = 0.9988 for 57 degrees of freedom
# Null hypothesis probability = 4.776542e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.290e-07 2.221e-07
25- 50 8.246e-07 4.255e-07
50-150 1.805e-06 9.361e-07
15-150 3.058e-06 1.575e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.13933 (-1.41825 1.55119)
R1^2/D10^2 : 1.46659 (-0.676337 1.6614)
kT2 [keV] : 23.7272 (-3.58771 5.70944)
R2^2/D10^2 : 2.62433E-02 (-0.0149202 0.0245266)
------------------------------------------------------------
# Chi-Squared = 56.22 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 55 degrees of freedom
# Null hypothesis probability = 4.290344e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.984e-07 9.626e-08
25- 50 8.558e-07 1.512e-07
50-150 1.718e-06 3.669e-07
15-150 2.972e-06 5.687e-07
Peak spectrum fit
Power-law model
Time interval is from -0.284 sec. to 0.716 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37679 ( -0.170527 0.171196 )
Norm@50keV : 3.71174E-02 ( -0.00391165 0.00390581 )
------------------------------------------------------------
# Chi-Squared = 53.49 using 59 PHA bins.
# Reduced chi-squared = 0.9385 for 57 degrees of freedom
# Null hypothesis probability = 6.074300e-01
Photon flux (15-150 keV) in 1 sec: 4.49697 ( -0.487133 0.488068 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.60396e-07 ( -4.10837e-08 4.12852e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.284 sec. to 0.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.593044 ( -0.872722 0.726706 )
Epeak [keV] : 96.4244 ( -26.538 394.712 )
Norm@50keV : 8.80306E-02 ( -0.0477754 0.135148 )
------------------------------------------------------------
# Chi-Squared = 50.09 using 59 PHA bins.
# Reduced chi-squared = 0.8944 for 56 degrees of freedom
# Null hypothesis probability = 6.971242e-01
Photon flux (15-150 keV) in 1 sec: 4.38108 ( -0.50081 0.50069 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.284 sec. to 0.716 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.621594 ( -0.43226 0.586037 )
beta : -9.35070 ( 9.9876 19.9876 )
Epeak [keV] : 98.7791 ( -43.3555 201.292 )
Norm@50keV : 8.48714E-02 ( -0.0347566 0.0546354 )
------------------------------------------------------------
# Chi-Squared = 50.09 using 59 PHA bins.
# Reduced chi-squared = 0.9108 for 55 degrees of freedom
# Null hypothesis probability = 6.621815e-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] : 16.9260 (-1.99023 2.30076)
R^2/D10^2 : 0.360600 (-0.128907 0.194176)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 61.76 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 57 degrees of freedom
# Null hypothesis probability = 3.098068e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.107e-08 4.165e-09
25- 50 9.288e-08 1.472e-08
50-150 1.897e-07 3.500e-08
15-150 3.037e-07 4.280e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.997 ( )
Norm : 18.7726 (-18.7726 -18.7726)
------------------------------------------------------------
# Chi-Squared = 54.75 using 59 PHA bins.
# Reduced chi-squared = 0.9606 for 57 degrees of freedom
# Null hypothesis probability = 5.598783e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.675e-08 2.510e-08
25- 50 8.993e-08 4.793e-08
50-150 1.972e-07 1.054e-07
15-150 3.339e-07 1.788e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.58447 (-6.30079 4.15077)
R1^2/D10^2 : 1.44292 (-0.858275 58.97)
kT2 [keV] : 28.8855 (-9.72671 69.5848)
R2^2/D10^2 : 4.00417E-02 (-0.0379487 0.140252)
------------------------------------------------------------
# Chi-Squared = 50.65 using 59 PHA bins.
# Reduced chi-squared = 0.9209 for 55 degrees of freedom
# Null hypothesis probability = 6.413943e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.192e-08 1.796e-08
25- 50 9.460e-08 4.825e-08
50-150 2.227e-07 1.190e-07
15-150 3.492e-07 1.799e-07
Plot creation:
Wed Sep 19 06:12:42 EDT 2012