batgrbproduct Analysis for Trigger=414905
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 page will be updated for up to 8 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.45
Process Start Time (local time): Fri Mar 5 19:41:19 EST 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger414905/GCN5_download_cron
======================================================================
Trigger: 00414905 Segment: 000
BAT Trigger Time: 289472744 [s; MET]
Trigger Stop: 289472808 [s; MET]
UTC: 2010-03-05T09:05:38.414420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 168.365441485924 Dec: 42.3762936166821 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.24
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.24
Flight Position: [ source = BAT ]
RA: 168.365441485924 Dec: 42.3762936166821 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 168.373159147756 Dec: 42.3804495308376 [deg; J2000]
{ 11h 13m 29.6s , +42d 22' 49.6" }
+/- 1.88360422881425 [arcmin] (estimated 90% radius based on SNR)
+/- 1.00755391224597 [arcmin] (formal 1-sigma fit error)
SNR: 12.3105090895131
Angular difference between Flight and Ground position is 0.423305 arcmin
Partial Coding Fraction: 0.2265625 [ including projection effects ]
Duration
T90: 70.3360000252724 +/- 8.07630802950526
Measured from: -1.73599988222122
to: 68.6000001430511 [s; relative to TRIGTIME]
T50: 43.3280000090599 +/- 11.2175091362977
Measured from: 19.1600001454353
to: 62.4880001544952 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 62.716000020504
to: 63.716000020504 [s; relative to TRIGTIME]
Total Fluence
Measured from: -9.17599999904633
to: 70.2639999985695 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.556749 0.658520 0.731105 0.255180
0.087773 0.092790 0.083726 0.075179 [error]
Peak 0.035315 0.033370 0.028122 0.025663
0.010309 0.011133 0.010071 0.008721 [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 1.51e-07 3.19e-07 5.29e-07 1.99e-06 1.46e-06 2.99e-06 erg/cm2
Error 3.68e-08 4.57e-08 8.08e-08 6.99e-07 2.02e-07 7.45e-07 erg/cm2
Peak flux Power-law 2.74e-01 2.85e-01 2.10e-01 2.49e-01 8.65e-01 1.02e+00 ph/cm2/s
Error 1.32e-01 9.04e-02 7.77e-02 1.85e-01 2.61e-01 3.12e-01 ph/cm2/s
Fluence Cutoff-PL 1.51e-07 3.20e-07 5.30e-07 1.98e-06 1.46e-06 2.98e-06 erg/cm2
Error 3.68e-08 4.58e-08 8.09e-08 6.94e-07 2.02e-07 7.40e-07 erg/cm2
Peak flux Cutoff-PL 2.23e-01 3.31e-01 2.25e-01 6.28e-02 8.28e-01 8.42e-01 ph/cm2/s
Error 1.55e-01 1.31e-01 1.02e-01 2.11e-01 2.77e-01 3.64e-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 1.271 0.230 - - 1.84e-03 2.30e-04 51.260 57
CPL 1.267 1.680 9999.3 0.0 1.85e-03 1.13e-03 51.260 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.442 0.493 - - 7.03e-03 2.15e-03 57.670 57
CPL 0.020 0.918 65.5 0.0 3.99e-02 3.83e+00 56.740 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: 66.176000 sec.
T50 in the 50-300 keV band: 48.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 79.440 -9.176 70.264
T90 70.336 -1.736 68.600
T50 43.328 19.160 62.488
Peak 1.000 62.716 63.716
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
168.3732 +42.3804 0.0157 34.5 103.3 2.2428 12.3 TRIG_00414905
------------------------------------------
Foreground time interval of the image:
-4.599 70.264 (delta_t = 74.863 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 -9.176 sec. to 70.264 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27114 ( -0.231229 0.228025 )
Norm@50keV : 1.84448E-03 ( -0.000230165 0.000230145 )
------------------------------------------------------------
# Chi-Squared = 51.26 using 59 PHA bins.
# Reduced chi-squared = 0.8992 for 57 degrees of freedom
# Null hypothesis probability = 6.894358e-01
Photon flux (15-150 keV) in 79.44 sec: 0.218922 ( -0.0284288 0.0285372 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.4584e-06 ( -2.01286e-07 2.02902e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.176 sec. to 70.264 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26718 ( -0.672569 2.68707 )
Epeak [keV] : 9999.34 ( )
Norm@50keV : 1.85247E-03 ( -0.000231123 0.00203667 )
------------------------------------------------------------
# Chi-Squared = 51.26 using 59 PHA bins.
# Reduced chi-squared = 0.9154 for 56 degrees of freedom
# Null hypothesis probability = 6.545149e-01
Photon flux (15-150 keV) in 79.44 sec: 0.218845 ( -0.028421 0.028527 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45868e-06 ( -2.01365e-07 2.02993e-07 ) ergs/cm2
Band function
Time interval is from -9.176 sec. to 70.264 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.971170 ( 0.970644 0.970644 )
beta : -1.27200 ( 1.27199 0.232206 )
Epeak [keV] : 59.2472 ( -59.4031 -59.4031 )
Norm@50keV : 3.42848E-03 ( -0.00343425 16.0772 )
------------------------------------------------------------
# Chi-Squared = 51.25 using 59 PHA bins.
# Reduced chi-squared = 0.9319 for 55 degrees of freedom
# Null hypothesis probability = 6.185987e-01
Photon flux (15-150 keV) in 79.44 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit
Power-law model
Time interval is from 62.716 sec. to 63.716 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44219 ( -0.488089 0.498599 )
Norm@50keV : 7.03479E-03 ( -0.0021659 0.00213706 )
------------------------------------------------------------
# Chi-Squared = 57.67 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 57 degrees of freedom
# Null hypothesis probability = 4.503148e-01
Photon flux (15-150 keV) in 1 sec: 0.865280 ( -0.260684 0.261331 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.74178e-08 ( -2.22318e-08 2.2837e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 62.716 sec. to 63.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99853E-02 ( -0.0188642 1.81653 )
Epeak [keV] : 65.5209 ( -65.4924 -65.4924 )
Norm@50keV : 3.98723E-02 ( -0.0399703 7.61487 )
------------------------------------------------------------
# Chi-Squared = 56.74 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 56 degrees of freedom
# Null hypothesis probability = 4.471181e-01
Photon flux (15-150 keV) in 1 sec: 0.828398 ( -0.282558 0.271992 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.03643e-08 ( -2.38348e-08 2.63085e-08 ) ergs/cm2
Band function
Time interval is from 62.716 sec. to 63.716 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.02276 ( 0.521315 0.521315 )
beta : -2.39426 ( 2.11635 2.25387 )
Epeak [keV] : 53.5565 ( -53.7312 153.898 )
Norm@50keV : 0.155989 ( -0.145548 29.5612 )
------------------------------------------------------------
# Chi-Squared = 56.28 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.268993e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Fri Mar 5 20:06:50 EST 2010