batgrbproduct Analysis for Trigger=416103
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 19:54:22 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger416103/GCN5_download_cron
======================================================================
Trigger: 00416103 Segment: 000
BAT Trigger Time: 290419302.592 [s; MET]
Trigger Stop: 290419303.104 [s; MET]
UTC: 2010-03-16T08:01:36.973480 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 163.498053786508 Dec: -45.4800063072237 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.1
Image Trigger?: NO
Rate S/N Ratio: 15.4272486205415 [ if not an image trigger ]
Image S/N Ratio: 9.1
Flight Position: [ source = BAT ]
RA: 163.498053786508 Dec: -45.4800063072237 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 163.499933715122 Dec: -45.46458499927 [deg; J2000]
{ 10h 54m 00.0s , -45d 27' 52.5" }
+/- 1.36475521498094 [arcmin] (estimated 90% radius based on SNR)
+/- 0.640848519908819 [arcmin] (formal 1-sigma fit error)
SNR: 19.5066640728966
Angular difference between Flight and Ground position is 0.928653 arcmin
Partial Coding Fraction: 0.8359375 [ including projection effects ]
Duration
T90: 3.91999995708466 +/- 0.445223531811273
Measured from: -0.187999904155731
to: 3.73200005292892 [s; relative to TRIGTIME]
T50: 2.27999997138977 +/- 0.354197683149933
Measured from: 0.340000092983246
to: 2.62000006437302 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.107999980449677
to: 0.892000019550323 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.416000008583069
to: 4.10799998044968 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.176589 0.168094 0.072176 0.009596
0.012781 0.012654 0.010528 0.008809 [error]
Peak 0.062309 0.061425 0.030246 0.006852
0.006378 0.006277 0.005181 0.004264 [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 5.56e-08 6.53e-08 5.53e-08 7.93e-08 2.05e-07 2.56e-07 erg/cm2
Error 6.72e-09 5.93e-09 9.61e-09 2.67e-08 2.17e-08 3.83e-08 erg/cm2
Peak flux Power-law 6.33e-01 4.39e-01 2.00e-01 1.27e-01 1.33e+00 1.40e+00 ph/cm2/s
Error 8.51e-02 4.83e-02 4.02e-02 4.63e-02 1.41e-01 1.52e-01 ph/cm2/s
Fluence Cutoff-PL 5.42e-08 6.82e-08 5.31e-08 3.76e-08 1.96e-07 2.13e-07 erg/cm2
Error 7.29e-09 7.88e-09 1.14e-08 5.12e-08 2.62e-08 5.74e-08 erg/cm2
Peak flux Cutoff-PL 6.13e-01 4.75e-01 1.93e-01 5.15e-02 1.32e+00 1.33e+00 ph/cm2/s
Error 9.13e-02 6.64e-02 4.56e-02 6.79e-02 1.40e-01 1.52e-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 6.15e-01 4.71e-01 1.34e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 9.07e-02 1.54e-01 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 2.241 0.182 - - 4.78e-03 5.97e-04 39.060 57
CPL 1.858 0.496 14.4 0.0 8.13e-03 0.00e+00 38.210 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.135 0.203 - - 8.33e-03 1.28e-03 58.090 57
CPL 1.530 0.730 30.2 21.7 1.95e-02 3.44e-02 56.190 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: 1.152000 sec.
T50 in the 50-300 keV band: 0.704000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 4.524 -0.416 4.108
T90 3.920 -0.188 3.732
T50 2.280 0.340 2.620
Peak 1.000 -0.108 0.892
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
163.4999 -45.4646 0.0098 14.4 83.2 0.4324 19.5 TRIG_00416103
------------------------------------------
Foreground time interval of the image:
-0.416 4.108 (delta_t = 4.524 [sec])
Background time interval of the image:
-239.592 -0.416 (delta_t = 239.176 [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 -0.416 sec. to 4.108 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.24062 ( -0.177246 0.18724 )
Norm@50keV : 4.77988E-03 ( -0.000602936 0.000591903 )
------------------------------------------------------------
# Chi-Squared = 39.06 using 59 PHA bins.
# Reduced chi-squared = 0.6853 for 57 degrees of freedom
# Null hypothesis probability = 9.666640e-01
Photon flux (15-150 keV) in 4.524 sec: 0.808614 ( -0.0708096 0.070831 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.04552e-07 ( -2.14905e-08 2.19677e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.416 sec. to 4.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85784 ( -0.851814 0.141152 )
Epeak [keV] : 14.4416 ( )
Norm@50keV : 8.12617E-03 ( )
------------------------------------------------------------
# Chi-Squared = 38.21 using 59 PHA bins.
# Reduced chi-squared = 0.6823 for 56 degrees of freedom
# Null hypothesis probability = 9.668729e-01
Photon flux (15-150 keV) in 4.524 sec: 0.795503 ( -0.074528 0.074342 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95777e-07 ( -2.56371e-08 2.67169e-08 ) ergs/cm2
Band function
Time interval is from -0.416 sec. to 4.108 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.00755 ( 1.99196 1.16743 )
beta : 10.00000 ( -1.97895e+15 -1.97895e+15 )
Epeak [keV] : 0.132862 ( )
Norm@50keV : 2.48287E-19 ( )
------------------------------------------------------------
# Chi-Squared = 212.87 using 59 PHA bins.
# Reduced chi-squared = 3.8703 for 55 degrees of freedom
# Null hypothesis probability = 1.982181e-20
Photon flux (15-150 keV) in 4.524 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit
Power-law model
Time interval is from -0.108 sec. to 0.892 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.13475 ( -0.19499 0.210218 )
Norm@50keV : 8.33024E-03 ( -0.00129083 0.00126007 )
------------------------------------------------------------
# Chi-Squared = 58.09 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.349667e-01
Photon flux (15-150 keV) in 1 sec: 1.33350 ( -0.140498 0.14052 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.76781e-08 ( -1.05326e-08 1.08193e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.108 sec. to 0.892 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53049 ( -0.889557 0.570711 )
Epeak [keV] : 30.2066 ( -26.2946 17.0951 )
Norm@50keV : 1.95287E-02 ( -0.0195308 0.0492976 )
------------------------------------------------------------
# Chi-Squared = 56.19 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 56 degrees of freedom
# Null hypothesis probability = 4.676867e-01
Photon flux (15-150 keV) in 1 sec: 1.31868 ( -0.14027 0.14069 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.32389e-08 ( -1.09029e-08 1.17612e-08 ) ergs/cm2
Band function
Time interval is from -0.108 sec. to 0.892 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.52754 ( 1.62279 1.62279 )
beta : -10.00000 ( 9.86923e+11 9.86923e+11 )
Epeak [keV] : 30.2864 ( -29.4662 17.4757 )
Norm@50keV : 1.95909E-02 ( -0.0195909 0.0492397 )
------------------------------------------------------------
# Chi-Squared = 56.19 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 55 degrees of freedom
# Null hypothesis probability = 4.300300e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue Mar 16 20:11:26 EDT 2010