batgrbproduct Analysis for Trigger=417420
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): Mon Mar 29 11:05:13 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger417420/GCN5_download_cron
======================================================================
Trigger: 00417420 Segment: 000
BAT Trigger Time: 291484424 [s; MET]
Trigger Stop: 291484488 [s; MET]
UTC: 2010-03-28T15:53:38.344600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 130.240085309801 Dec: -45.0280746858094 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.68
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.68
Flight Position: [ source = BAT ]
RA: 130.240085309801 Dec: -45.0280746858094 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 130.119031989273 Dec: -45.0989542426507 [deg; J2000]
{ 08h 40m 28.6s , -45d 05' 56.2" }
+/- 2.92035803644092 [arcmin] (estimated 90% radius based on SNR)
+/- 1.46034936779425 [arcmin] (formal 1-sigma fit error)
SNR: 6.57975415053347
Angular difference between Flight and Ground position is 6.663679 arcmin
Partial Coding Fraction: 0.921875 [ including projection effects ]
Duration
T90: 210.304000020027 +/- 56.9073734092406
Measured from: -98.2639998793602
to: 112.040000140667 [s; relative to TRIGTIME]
T50: 95.5519999861717 +/- 39.2081885440857
Measured from: -40.2799998521805
to: 55.2720001339912 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 13.0120000243187
to: 14.0120000243187 [s; relative to TRIGTIME]
Total Fluence
Measured from: -116.824000000954
to: 128.615999996662 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.762344 0.751177 0.127732 0.037547
0.084193 0.086246 0.077092 0.073474 [error]
Peak 0.012582 0.021872 0.003471 -0.001063
0.005365 0.005481 0.004810 0.004591 [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 2.47e-07 2.64e-07 2.00e-07 2.47e-07 8.05e-07 9.58e-07 erg/cm2
Error 4.09e-08 4.18e-08 6.13e-08 1.40e-07 1.45e-07 2.30e-07 erg/cm2
Peak flux Power-law 1.40e-01 1.14e-01 6.29e-02 5.10e-02 3.40e-01 3.68e-01 ph/cm2/s
Error 7.24e-02 4.38e-02 3.75e-02 6.00e-02 1.30e-01 1.45e-01 ph/cm2/s
Fluence Cutoff-PL 2.31e-07 3.22e-07 1.33e-07 1.02e-08 6.95e-07 0.00e+00 erg/cm2
Error 4.63e-08 6.01e-08 7.57e-08 1.35e-07 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 9.66e-02 1.67e-01 4.67e-02 7.86e-04 3.11e-01 3.11e-01 ph/cm2/s
Error 6.66e-02 6.24e-02 3.81e-02 2.44e-02 1.14e-01 1.14e-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 2.400 0.288 - - 3.36e-04 7.62e-05 82.930 57
CPL 0.086 1.947 28.6 15.2 1.03e-02 0.00e+00 77.090 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.859 0.699 - - 2.41e-03 1.13e-03 50.690 57
CPL -4.461 0.000 40.4 17.7 1.08e+01 7.67e+00 47.450 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 245.440 -116.824 128.616
T90 210.304 -98.264 112.040
T50 95.552 -40.280 55.272
Peak 1.000 13.012 14.012
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
130.1190 -45.0990 0.0291 24.2 -5.1 1.8905 6.6 TRIG_00417420
------------------------------------------
Foreground time interval of the image:
-116.824 128.616 (delta_t = 245.440 [sec])
Background time interval of the image:
-239.000 -116.824 (delta_t = 122.176 [sec])
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 -116.824 sec. to 128.616 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.39971 ( -0.272363 0.304536 )
Norm@50keV : 3.36402E-04 ( -7.62637e-05 7.61823e-05 )
------------------------------------------------------------
# Chi-Squared = 82.93 using 59 PHA bins.
# Reduced chi-squared = 1.455 for 57 degrees of freedom
# Null hypothesis probability = 1.407506e-02
Photon flux (15-150 keV) in 245.4 sec: 6.22316E-02 ( -0.00860166 0.00860689 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.05221e-07 ( -1.41236e-07 1.48442e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -116.824 sec. to 128.616 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 8.58670E-02 ( -2.86545 1.02902 )
Epeak [keV] : 28.5625 ( -21.0419 9.33217 )
Norm@50keV : 1.03357E-02 ( )
------------------------------------------------------------
# Chi-Squared = 77.09 using 59 PHA bins.
# Reduced chi-squared = 1.377 for 56 degrees of freedom
# Null hypothesis probability = 3.234279e-02
Photon flux (15-150 keV) in 245.4 sec: 5.98245E-02 ( -0.0084604 0.0085293 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -116.824 sec. to 128.616 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.140361 ( -1.35241 1.81195 )
beta : -9.99984 ( 19589.1 19599.1 )
Epeak [keV] : 28.3027 ( -19.4709 6.37447 )
Norm@50keV : 9.62196E-03 ( -0.00838711 0.164962 )
------------------------------------------------------------
# Chi-Squared = 77.07 using 59 PHA bins.
# Reduced chi-squared = 1.401 for 55 degrees of freedom
# Null hypothesis probability = 2.640007e-02
Photon flux (15-150 keV) in 245.4 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit
Power-law model
Time interval is from 13.012 sec. to 14.012 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85876 ( -0.640047 0.758341 )
Norm@50keV : 2.40946E-03 ( -0.00116029 0.00110604 )
------------------------------------------------------------
# Chi-Squared = 50.69 using 59 PHA bins.
# Reduced chi-squared = 0.8894 for 57 degrees of freedom
# Null hypothesis probability = 7.091070e-01
Photon flux (15-150 keV) in 1 sec: 0.339898 ( -0.130047 0.130053 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.21537e-08 ( -9.92492e-09 1.08264e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 13.012 sec. to 14.012 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.46107 ( )
Epeak [keV] : 40.3875 ( -8.64111 26.837 )
Norm@50keV : 10.8372 ( -11.1546 4.1831 )
------------------------------------------------------------
# Chi-Squared = 47.45 using 59 PHA bins.
# Reduced chi-squared = 0.8473 for 56 degrees of freedom
# Null hypothesis probability = 7.850908e-01
Photon flux (15-150 keV) in 1 sec: 0.311008 ( -0.111231 0.11762 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.73927e-08 ( -6.4728e-09 8.5236e-09 ) ergs/cm2
Band function
Time interval is from 13.012 sec. to 14.012 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96169 ( -61.846 -51.8468 )
beta : -5.95618 ( 5.30977 4.79831 )
Epeak [keV] : 40.2914 ( -5.46564 9.03943 )
Norm@50keV : 20.6876 ( -20.6876 133.54 )
------------------------------------------------------------
# Chi-Squared = 47.31 using 59 PHA bins.
# Reduced chi-squared = 0.8601 for 55 degrees of freedom
# Null hypothesis probability = 7.600468e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Mon Mar 29 12:00:44 EDT 2010