batgrbproduct Analysis for Trigger=416140
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): Tue Mar 16 19:19:52 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger416140/GCN5_download_cron
======================================================================
Trigger: 00416140 Segment: 000
BAT Trigger Time: 290439467.072 [s; MET]
Trigger Stop: 290439468.096 [s; MET]
UTC: 2010-03-16T13:37:41.452780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 330.258258781808 Dec: -52.2027570953534 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.7
Image Trigger?: NO
Rate S/N Ratio: 46.9361268108053 [ if not an image trigger ]
Image S/N Ratio: 6.7
Flight Position: [ source = BAT ]
RA: 330.258258781808 Dec: -52.2027570953534 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 330.19409395531 Dec: -52.2166334400151 [deg; J2000]
{ 22h 00m 46.6s , -52d 12' 59.9" }
+/- 4.11294719365379 [arcmin] (estimated 90% radius based on SNR)
+/- 2.2190514009397 [arcmin] (formal 1-sigma fit error)
SNR: 4.03419382730101
Angular difference between Flight and Ground position is 2.501717 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: -2.98023223876953e-08
to: 1.02399995923042 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.001785 -0.004874 0.022758 0.047202
0.007392 0.008829 0.009274 0.011396 [error]
Peak 0.001785 -0.004874 0.022758 0.047202
0.007392 0.008829 0.009274 0.011396 [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 1.06e-10 1.24e-09 1.32e-08 1.03e-06 5.80e-08 1.05e-06 erg/cm2
Error 2.52e-10 1.73e-09 1.10e-08 7.66e-07 4.23e-08 7.75e-07 erg/cm2
Peak flux Power-law 3.16e-03 1.92e-02 1.02e-01 2.46e+00 3.34e-01 2.59e+00 ph/cm2/s
Error 7.97e-03 2.77e-02 6.53e-02 1.80e+00 1.71e-01 1.27e+00 ph/cm2/s
Fluence Cutoff-PL 8.31e-11 1.07e-09 1.26e-08 1.17e-06 5.84e-08 1.18e-06 erg/cm2
Error 2.37e-10 1.63e-09 1.08e-08 8.73e-07 4.25e-08 8.81e-07 erg/cm2
Peak flux Cutoff-PL 2.47e-03 1.66e-02 9.77e-02 2.76e+00 3.31e-01 2.87e+00 ph/cm2/s
Error 7.17e-03 2.60e-02 6.47e-02 1.46e+00 1.71e-01 1.45e+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 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 -1.353 0.741 - - 1.22e-03 1.31e-03 58.960 57
CPL -2.712 -0.500 999.9 0.0 7.02e-04 2.90e-03 57.620 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.351 0.740 - - 1.22e-03 1.32e-03 59.430 57
CPL -3.078 0.000 3011.9 -96.6 3.04e-04 2.00e-03 57.960 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 -0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
330.1941 -52.2166 0.0476 17.4 164.3 0.0815 4.0 TRIG_00416140
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.072 -11.072 (delta_t = 49.000 [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 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.35319 ( -0.588377 0.894032 )
Norm@50keV : 1.21564E-03 ( -0.00119307 0.00142842 )
------------------------------------------------------------
# Chi-Squared = 58.96 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 57 degrees of freedom
# Null hypothesis probability = 4.037881e-01
Photon flux (15-150 keV) in 1.024 sec: 0.332473 ( -0.173655 0.167643 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.80343e-08 ( -5.80344e-08 2.65184e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.71185 ( 2.71186 1.71202 )
Epeak [keV] : 999.850 ( -999.896 -999.896 )
Norm@50keV : 7.02161E-04 ( -0.000701922 0.00510469 )
------------------------------------------------------------
# Chi-Squared = 57.62 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 56 degrees of freedom
# Null hypothesis probability = 4.150799e-01
Photon flux (15-150 keV) in 1.024 sec: 0.302566 ( -0.118699 0.173723 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.84263e-08 ( -5.84263e-08 2.66159e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.109107 ( 0.0304935 0.0304935 )
beta : 1.38665 ( -0.932231 0.545639 )
Epeak [keV] : 25.8831 ( -25.125 -25.125 )
Norm@50keV : 1.70087E-03 ( 105.28 -0.00166352 )
------------------------------------------------------------
# Chi-Squared = 58.95 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 55 degrees of freedom
# Null hypothesis probability = 3.332612e-01
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.35054 ( -0.589718 0.89085 )
Norm@50keV : 1.22474E-03 ( -0.00120154 0.00143045 )
------------------------------------------------------------
# Chi-Squared = 59.43 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 57 degrees of freedom
# Null hypothesis probability = 3.870541e-01
Photon flux (15-150 keV) in 1.024 sec: 0.334135 ( -0.173911 0.167676 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.83236e-08 ( -5.83236e-08 2.6498e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.07754 ( )
Epeak [keV] : 3011.87 ( -807.065 -1000.36 )
Norm@50keV : 3.03515E-04 ( -0.000305824 0.00369993 )
------------------------------------------------------------
# Chi-Squared = 57.96 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 56 degrees of freedom
# Null hypothesis probability = 4.027527e-01
Photon flux (15-150 keV) in 1.024 sec: 0.330853 ( -0.171398 0.171172 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.87056e-08 ( -5.87056e-08 2.66109e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.991278 ( 0.994936 0.994936 )
beta : 1.41505 ( -0.93911 0.535417 )
Epeak [keV] : 10.2723 ( -10.2934 -10.2934 )
Norm@50keV : 1.84378E-03 ( 0.822497 -0.001848 )
------------------------------------------------------------
# Chi-Squared = 59.42 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 55 degrees of freedom
# Null hypothesis probability = 3.179612e-01
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue Mar 16 19:28:01 EDT 2010