batgrbproduct Analysis for Trigger=383063
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): Wed Jan 20 08:27:26 EST 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger383063/GCN5_download_cron
======================================================================
Trigger: 00383063 Segment: 000
BAT Trigger Time: 285618331.2 [s; MET]
Trigger Stop: 285618333.248 [s; MET]
UTC: 2010-01-19T18:25:25.746880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.32651470397 Dec: -53.1602425157852 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.61
Image Trigger?: NO
Rate S/N Ratio: 40.8900966005217 [ if not an image trigger ]
Image S/N Ratio: 9.61
Flight Position: [ source = BAT ]
RA: 299.32651470397 Dec: -53.1602425157852 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.307465851829 Dec: -53.1497780421499 [deg; J2000]
{ 19h 57m 13.8s , -53d 08' 59.2" }
+/- 1.24541032585681 [arcmin] (estimated 90% radius based on SNR)
+/- 0.463466846315068 [arcmin] (formal 1-sigma fit error)
SNR: 22.2309345316794
Angular difference between Flight and Ground position is 0.929483 arcmin
Partial Coding Fraction: 0.07617188 [ including projection effects ]
Duration
T90: 28.9920000433922 +/- 2.39364490672037
Measured from: -14.6719998717308
to: 14.3200001716614 [s; relative to TRIGTIME]
T50: 13.3600000143051 +/- 0.83996187354256
Measured from: -4.78399986028671
to: 8.5760001540184 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.11599999666214
to: 3.11599999666214 [s; relative to TRIGTIME]
Total Fluence
Measured from: -19.2479999661446
to: 16.8799999952316 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.949579 6.100801 6.651043 3.115384
0.167656 0.198200 0.198692 0.181888 [error]
Peak 0.121628 0.245574 0.420823 0.216632
0.031023 0.036818 0.042235 0.037322 [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 1.14e-06 2.77e-06 5.37e-06 2.56e-05 1.45e-05 3.49e-05 erg/cm2
Error 8.74e-08 1.26e-07 1.95e-07 2.20e-06 5.13e-07 2.26e-06 erg/cm2
Peak flux Power-law 1.22e+00 2.03e+00 2.58e+00 6.56e+00 7.65e+00 1.24e+01 ph/cm2/s
Error 3.82e-01 3.90e-01 3.06e-01 1.77e+00 9.90e-01 1.74e+00 ph/cm2/s
Fluence Cutoff-PL 1.12e-06 2.78e-06 5.41e-06 2.45e-05 1.45e-05 3.30e-05 erg/cm2
Error 1.07e-07 1.14e-07 2.31e-07 5.29e-06 4.52e-07 4.64e-06 erg/cm2
Peak flux Cutoff-PL 1.21e+00 2.03e+00 2.58e+00 6.52e+00 7.65e+00 1.24e+01 ph/cm2/s
Error 3.82e-01 3.91e-01 3.06e-01 1.76e+00 9.89e-01 1.73e+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 1.045 0.062 - - 3.78e-02 1.34e-03 67.570 57
CPL 1.030 0.169 3704.2 0.0 3.83e-02 6.06e-03 67.520 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.655 0.233 - - 6.59e-02 9.26e-03 48.200 57
CPL 0.646 0.449 9999.3 0.0 6.65e-02 2.67e-02 48.230 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: 26.240000 sec.
T50 in the 50-300 keV band: 12.416000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 36.128 -19.248 16.880
T90 28.992 -14.672 14.320
T50 13.360 -4.784 8.576
Peak 1.000 2.116 3.116
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.3075 -53.1498 0.0086 48.8 -134.7 20.6186 22.2 TRIG_00383063
------------------------------------------
Foreground time interval of the image:
-19.248 16.880 (delta_t = 36.128 [sec])
Background time interval of the image:
-179.200 -57.130 (delta_t = 122.070 [sec])
-56.200 -19.248 (delta_t = 36.952 [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 -19.248 sec. to 16.880 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04540 ( -0.0627809 0.0621512 )
Norm@50keV : 3.77543E-02 ( -0.00134421 0.00133959 )
------------------------------------------------------------
# Chi-Squared = 67.57 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 57 degrees of freedom
# Null hypothesis probability = 1.596242e-01
Photon flux (15-150 keV) in 36.13 sec: 4.35900 ( -0.161959 0.162506 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45197e-05 ( -5.12024e-07 5.13097e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -19.248 sec. to 16.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02965 ( -0.264421 0.0737275 )
Epeak [keV] : 3704.21 ( -1000.38 -1000.38 )
Norm@50keV : 3.83264E-02 ( -0.00155033 0.0105757 )
------------------------------------------------------------
# Chi-Squared = 67.52 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 56 degrees of freedom
# Null hypothesis probability = 1.392132e-01
Photon flux (15-150 keV) in 36.13 sec: 4.35739 ( -0.16184 0.16244 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45137e-05 ( -5.14744e-07 3.89373e-07 ) ergs/cm2
Band function
Time interval is from -19.248 sec. to 16.880 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.885058 ( 0.885058 3.41439 )
beta : -1.04540 ( -0.0621105 0.0628503 )
Epeak [keV] : 36.8730 ( -36.873 9963.13 )
Norm@50keV : 6.35110E-02 ( -0.0228371 1.24557e+06 )
------------------------------------------------------------
# Chi-Squared = 67.57 using 59 PHA bins.
# Reduced chi-squared = 1.228 for 55 degrees of freedom
# Null hypothesis probability = 1.190028e-01
Photon flux (15-150 keV) in 36.13 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 2.112 sec. to 3.120 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.655035 ( -0.240767 0.224368 )
Norm@50keV : 6.59304E-02 ( -0.00942971 0.00909814 )
------------------------------------------------------------
# Chi-Squared = 48.20 using 59 PHA bins.
# Reduced chi-squared = 0.8457 for 57 degrees of freedom
# Null hypothesis probability = 7.902438e-01
Photon flux (15-150 keV) in 1.008 sec: 7.65136 ( -0.98739 0.992334 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.28066e-07 ( -1.01346e-07 1.01449e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.112 sec. to 3.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.646158 ( -0.59017 0.308096 )
Epeak [keV] : 9999.34 ( )
Norm@50keV : 6.64522E-02 ( -0.00872406 0.0447138 )
------------------------------------------------------------
# Chi-Squared = 48.23 using 59 PHA bins.
# Reduced chi-squared = 0.8613 for 56 degrees of freedom
# Null hypothesis probability = 7.603377e-01
Photon flux (15-150 keV) in 1.008 sec: 7.64938 ( -0.98696 0.99199 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.2851e-07 ( -1.0143e-07 1.01534e-07 ) ergs/cm2
Band function
Time interval is from 2.112 sec. to 3.120 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.975537 ( 0.975537 0.975537 )
beta : -0.655035 ( -0.224369 0.240753 )
Epeak [keV] : 17.6014 ( -17.6014 -17.6014 )
Norm@50keV : 8.77504E-02 ( -0.0308186 1.30754e+06 )
------------------------------------------------------------
# Chi-Squared = 48.20 using 59 PHA bins.
# Reduced chi-squared = 0.8764 for 55 degrees of freedom
# Null hypothesis probability = 7.299275e-01
Photon flux (15-150 keV) in 1.008 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Wed Jan 20 08:42:39 EST 2010