batgrbproduct Analysis for Trigger=335647
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 v2.45
Process Start Time (local time): Fri Aug 7 03:05:30 EDT 2009
Host Name: gcn14
Current Working Dir: /net/raid16/BAT_GRB_process_2009/335647
======================================================================
Trigger: 00335647 Segment: 000
BAT Trigger Time: 249428053.568 [s; MET]
Trigger Stop: 249428054.592 [s; MET]
UTC: 2008-11-26T21:34:10.280820 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 323.541872169791 Dec: 48.7093541229447 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.45
Image Trigger?: NO
Rate S/N Ratio: 44.2831796509691 [ if not an image trigger ]
Image S/N Ratio: 14.45
Flight Position: [ source = BAT ]
RA: 323.541872169791 Dec: 48.7093541229447 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 323.522113564774 Dec: 48.7139342056592 [deg; J2000]
{ 21h 34m 05.3s , +48d 42' 50.2" }
+/- 0.826713642521523 [arcmin] (estimated 90% radius based on SNR)
+/- 0.301045575261766 [arcmin] (formal 1-sigma fit error)
SNR: 39.9192631689437
Angular difference between Flight and Ground position is 0.829127 arcmin
Partial Coding Fraction: 0.6796875 [ including projection effects ]
Duration
T90: 57.6480000019073 +/- 5.85040066050243
Measured from: -17.783999979496
to: 39.8640000224113 [s; relative to TRIGTIME]
T50: 31.4399999976158 +/- 0.452866415824261
Measured from: -0.183999985456467
to: 31.2560000121593 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.752000004053116
to: 1.75200000405312 [s; relative to TRIGTIME]
Total Fluence
Measured from: -21.527999997139
to: 56.9120000004768 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.101600 1.796884 1.700389 0.527732
0.052394 0.055005 0.049074 0.041008 [error]
Peak 0.088494 0.156951 0.174945 0.064264
0.007555 0.008779 0.008971 0.006745 [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 3.36e-07 7.36e-07 1.27e-06 5.08e-06 3.48e-06 7.42e-06 erg/cm2
Error 2.36e-08 2.99e-08 4.90e-08 4.62e-07 1.24e-07 4.84e-07 erg/cm2
Peak flux Power-law 8.16e-01 1.11e+00 1.12e+00 2.05e+00 3.71e+00 5.10e+00 ph/cm2/s
Error 8.58e-02 7.13e-02 6.87e-02 2.69e-01 2.01e-01 3.20e-01 ph/cm2/s
Fluence Cutoff-PL 3.23e-07 7.43e-07 1.29e-06 4.13e-06 3.45e-06 6.48e-06 erg/cm2
Error 3.04e-08 3.19e-08 5.65e-08 1.20e-06 1.34e-07 1.19e-06 erg/cm2
Peak flux Cutoff-PL 7.84e-01 1.13e+00 1.15e+00 1.70e+00 3.69e+00 4.76e+00 ph/cm2/s
Error 1.05e-01 7.82e-02 6.34e-02 5.53e-01 2.05e-01 5.85e-01 ph/cm2/s
Fluence Band 3.16e-07 7.32e-07 1.28e-06 4.16e-06 3.42e-06 6.52e-06 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 7.83e-01 1.13e+00 1.15e+00 1.81e+00 3.69e+00 4.87e+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 1.212 0.062 - - 4.38e-03 1.46e-04 46.830 57
CPL 1.059 0.231 348.8 0.0 5.13e-03 1.15e-03 45.650 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.989 0.093 - - 3.22e-02 1.74e-03 49.080 57
CPL 0.822 0.289 396.0 0.0 3.85e-02 1.27e-02 48.400 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: 54.144000 sec.
T50 in the 50-300 keV band: 31.168000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 78.440 -21.528 56.912
T90 57.648 -17.784 39.864
T50 31.440 -0.184 31.256
Peak 1.000 0.752 1.752
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
323.5221 +48.7139 0.0048 19.9 73.0 3.0674 39.9 TRIG_00335647
------------------------------------------
Foreground time interval of the image:
-21.528 11.333 (delta_t = 32.861 [sec])
Background time interval of the image:
-239.568 -21.528 (delta_t = 218.040 [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 -21.528 sec. to 56.912 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21246 ( -0.0625671 0.0622296 )
Norm@50keV : 4.38435E-03 ( -0.000146273 0.000146158 )
------------------------------------------------------------
# Chi-Squared = 46.83 using 59 PHA bins.
# Reduced chi-squared = 0.8216 for 57 degrees of freedom
# Null hypothesis probability = 8.294662e-01
Photon flux (15-150 keV) in 78.44 sec: 0.515554 ( -0.0183181 0.0183571 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47693e-06 ( -1.2416e-07 1.24422e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -21.528 sec. to 56.912 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05919 ( -0.252359 0.209083 )
Epeak [keV] : 348.848 ( -348.863 -348.863 )
Norm@50keV : 5.13089E-03 ( -0.000835588 0.00146561 )
------------------------------------------------------------
# Chi-Squared = 45.65 using 59 PHA bins.
# Reduced chi-squared = 0.8153 for 56 degrees of freedom
# Null hypothesis probability = 8.367387e-01
Photon flux (15-150 keV) in 78.44 sec: 0.510618 ( -0.019756 0.019794 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.44658e-06 ( -1.3487e-07 1.34125e-07 ) ergs/cm2
Band function
Time interval is from -21.528 sec. to 56.912 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.918312 ( 0.654427 0.654427 )
beta : -1.29792 ( 1.26046 0.0887846 )
Epeak [keV] : 176.468 ( -176.501 -176.501 )
Norm@50keV : 6.14924E-03 ( -0.00184444 0.0126397 )
------------------------------------------------------------
# Chi-Squared = 45.21 using 59 PHA bins.
# Reduced chi-squared = 0.8220 for 55 degrees of freedom
# Null hypothesis probability = 8.239948e-01
Photon flux (15-150 keV) in 78.44 sec: 0.504414 ( -0.020689 0.020085 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.42224e-06 ( -1.33944e-07 1.3363e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.7705 ( )
R^2/D10^2 : 2.39979E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 203.99 using 59 PHA bins.
# Reduced chi-squared = 3.5788 for 57 degrees of freedom
# Null hypothesis probability = 2.067001e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.425e-07 1.063e-08
25- 50 7.043e-07 3.498e-08
50-150 2.037e-06 1.149e-07
15-150 2.884e-06 1.137e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 2.18022 ( )
------------------------------------------------------------
# Chi-Squared = 136.37 using 59 PHA bins.
# Reduced chi-squared = 2.3924 for 57 degrees of freedom
# Null hypothesis probability = 1.877632e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.258e-07 2.173e-07
25- 50 8.191e-07 4.181e-07
50-150 1.797e-06 9.166e-07
15-150 3.042e-06 1.551e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.49479 (-1.23177 1.37314)
R1^2/D10^2 : 0.228888 (-0.0820417 0.147165)
kT2 [keV] : 33.6760 (-4.52441 7.25936)
R2^2/D10^2 : 3.54476E-03 (-0.00163929 0.00222375)
------------------------------------------------------------
# Chi-Squared = 49.98 using 59 PHA bins.
# Reduced chi-squared = 0.9088 for 55 degrees of freedom
# Null hypothesis probability = 6.662535e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.899e-07 4.024e-08
25- 50 7.683e-07 7.793e-08
50-150 2.393e-06 2.745e-07
15-150 3.451e-06 3.608e-07
Peak spectrum fit
Power-law model
Time interval is from 0.752 sec. to 1.752 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.988541 ( -0.0931878 0.0923898 )
Norm@50keV : 3.22463E-02 ( -0.00173556 0.00173503 )
------------------------------------------------------------
# Chi-Squared = 49.08 using 59 PHA bins.
# Reduced chi-squared = 0.8611 for 57 degrees of freedom
# Null hypothesis probability = 7.629047e-01
Photon flux (15-150 keV) in 1 sec: 3.71039 ( -0.200995 0.201631 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.50204e-07 ( -2.14545e-08 2.17185e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.752 sec. to 1.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.822040 ( -0.368239 0.210197 )
Epeak [keV] : 395.995 ( -395.997 -395.997 )
Norm@50keV : 3.85218E-02 ( -0.0075664 0.0177807 )
------------------------------------------------------------
# Chi-Squared = 48.40 using 59 PHA bins.
# Reduced chi-squared = 0.8644 for 56 degrees of freedom
# Null hypothesis probability = 7.546559e-01
Photon flux (15-150 keV) in 1 sec: 3.69214 ( -0.20486 0.20431 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47486e-07 ( -2.2609e-08 2.2478e-08 ) ergs/cm2
Band function
Time interval is from 0.752 sec. to 1.752 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.982741 ( 0.827046 0.827046 )
beta : -8.93437 ( -0.0924032 0.0932163 )
Epeak [keV] : 10000.00 ( -4.87055e+06 -4.87055e+06 )
Norm@50keV : 3.24424E-02 ( -0.00174505 0.00174471 )
------------------------------------------------------------
# Chi-Squared = 49.04 using 59 PHA bins.
# Reduced chi-squared = 0.8916 for 55 degrees of freedom
# Null hypothesis probability = 7.006861e-01
Photon flux (15-150 keV) in 1 sec: 3.68930 ( -0.20413 0.20485 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47246e-07 ( -2.2588e-08 2.246e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.6325 (-1.62043 1.7969)
R^2/D10^2 : 0.141413 (-0.0308644 0.0386932)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 109.67 using 59 PHA bins.
# Reduced chi-squared = 1.9240 for 57 degrees of freedom
# Null hypothesis probability = 3.464834e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.234e-08 1.275e-09
25- 50 6.460e-08 5.085e-09
50-150 2.257e-07 2.015e-08
15-150 3.027e-07 2.230e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 14.4399 ( )
------------------------------------------------------------
# Chi-Squared = 141.34 using 59 PHA bins.
# Reduced chi-squared = 2.4797 for 57 degrees of freedom
# Null hypothesis probability = 4.089017e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.596e-08 1.878e-08
25- 50 6.917e-08 3.607e-08
50-150 1.517e-07 7.900e-08
15-150 2.568e-07 1.346e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.67701 (-1.77669 2.29337)
R1^2/D10^2 : 1.86722 (-0.983692 2.5072)
kT2 [keV] : 33.2921 (-5.31819 10.1093)
R2^2/D10^2 : 3.24773E-02 (-0.0181359 0.0245509)
------------------------------------------------------------
# Chi-Squared = 49.94 using 59 PHA bins.
# Reduced chi-squared = 0.9079 for 55 degrees of freedom
# Null hypothesis probability = 6.680310e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.454e-08 7.300e-09
25- 50 6.520e-08 1.214e-08
50-150 2.598e-07 4.630e-08
15-150 3.495e-07 6.335e-08
Plot creation:
Tue Jul 26 11:55:03 EDT 2011