batgrbproduct Analysis for Trigger=355267
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): Sun Jun 21 05:35:30 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger355267/GCN5_download_cron
======================================================================
Trigger: 00355267 Segment: 000
BAT Trigger Time: 267200407.616 [s; MET]
Trigger Stop: 267200408.64 [s; MET]
UTC: 2009-06-20T14:20:02.772940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 11.4059253695655 Dec: -3.13141461669284 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.71
Image Trigger?: NO
Rate S/N Ratio: 12.4096736459909 [ if not an image trigger ]
Image S/N Ratio: 5.71
Flight Position: [ source = BAT ]
RA: 11.4059253695655 Dec: -3.13141461669284 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 11.3789647658035 Dec: -3.18195521545823 [deg; J2000]
{ 00h 45m 31.0s , -03d 10' 55.0" }
+/- 5.2972040672839 [arcmin] (estimated 90% radius based on SNR)
+/- 4.05741056679241 [arcmin] (formal 1-sigma fit error)
SNR: 2.81038582263258
Angular difference between Flight and Ground position is 3.435765 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 1.02399998903275 +/- 0.004
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/- 0.004
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: 0
to: 1.02399998903275 [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 -0.004173 0.005022 0.021151 0.022548
0.005519 0.005951 0.005764 0.006403 [error]
Peak -0.004173 0.005022 0.021151 0.022548
0.005519 0.005951 0.005764 0.006403 [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 3.02e-10 1.97e-09 1.13e-08 3.06e-07 3.78e-08 3.19e-07 erg/cm2
Error 6.23e-10 2.30e-09 8.35e-09 4.45e-07 1.53e-08 4.49e-07 erg/cm2
Peak flux Power-law 9.09e-03 3.14e-02 8.98e-02 7.85e-01 2.48e-01 9.15e-01 ph/cm2/s
Error 1.92e-02 3.79e-02 6.76e-02 9.00e-01 1.73e-01 8.63e-01 ph/cm2/s
Fluence Cutoff-PL 1.36e-10 1.59e-09 1.25e-08 1.17e-07 3.84e-08 1.41e-07 erg/cm2
Error 6.03e-10 2.10e-09 7.13e-09 2.88e-07 1.59e-08 4.92e-07 erg/cm2
Peak flux Cutoff-PL 9.07e-03 3.14e-02 9.00e-02 7.80e-01 2.48e-01 9.11e-01 ph/cm2/s
Error 1.91e-02 3.79e-02 6.77e-02 9.99e-01 1.67e-01 9.59e-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 -0.517 1.534 - - 1.46e-03 1.39e-03 54.550 57
CPL -1.949 0.199 236.9 0.0 3.22e-03 2.01e-02 54.400 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.517 1.534 - - 1.46e-03 1.39e-03 54.550 57
CPL -1.949 0.199 236.9 0.0 3.22e-03 2.01e-02 54.400 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
11.3790 -3.1820 0.0680 6.4 -158.2 0.0350 2.8 TRIG_00355267
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.616 -7.616 (delta_t = 53.000 [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: -0.516701 ( -2.07806 0.990619 )
Norm@50keV : 1.46353E-03 ( -0.00146353 0.00131924 )
------------------------------------------------------------
# Chi-Squared = 54.55 using 59 PHA bins.
# Reduced chi-squared = 0.9570 for 57 degrees of freedom
# Null hypothesis probability = 5.674845e-01
Photon flux (15-150 keV) in 1.024 sec: 0.247581 ( -0.228865 0.116811 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.77504e-08 ( -1.52776e-08 1.52772e-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: -1.94864 ( 1.94676 2.34509 )
Epeak [keV] : 236.861 ( -237.196 -237.196 )
Norm@50keV : 3.22434E-03 ( -0.00321631 0.0370353 )
------------------------------------------------------------
# Chi-Squared = 54.40 using 59 PHA bins.
# Reduced chi-squared = 0.9714 for 56 degrees of freedom
# Null hypothesis probability = 5.356397e-01
Photon flux (15-150 keV) in 1.024 sec: 0.247846 ( -0.217758 0.116759 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.84441e-08 ( -1.59471e-08 1.57744e-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 : -0.107897 ( 0.107511 0.107511 )
beta : 0.516511 ( -0.990434 2.07632 )
Epeak [keV] : 22.3662 ( -22.3688 -22.3688 )
Norm@50keV : 2.21765E-03 ( 1684.47 -0.00221796 )
------------------------------------------------------------
# Chi-Squared = 54.55 using 59 PHA bins.
# Reduced chi-squared = 0.9918 for 55 degrees of freedom
# Null hypothesis probability = 4.917091e-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 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: -0.516701 ( -2.07806 0.990619 )
Norm@50keV : 1.46353E-03 ( -0.00146353 0.00131924 )
------------------------------------------------------------
# Chi-Squared = 54.55 using 59 PHA bins.
# Reduced chi-squared = 0.9570 for 57 degrees of freedom
# Null hypothesis probability = 5.674845e-01
Photon flux (15-150 keV) in 1.024 sec: 0.247581 ( -0.228865 0.116811 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.77504e-08 ( -1.52776e-08 1.52772e-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: -1.94864 ( 1.94676 2.34509 )
Epeak [keV] : 236.861 ( -237.196 -237.196 )
Norm@50keV : 3.22434E-03 ( -0.00321631 0.0370353 )
------------------------------------------------------------
# Chi-Squared = 54.40 using 59 PHA bins.
# Reduced chi-squared = 0.9714 for 56 degrees of freedom
# Null hypothesis probability = 5.356397e-01
Photon flux (15-150 keV) in 1.024 sec: 0.247846 ( -0.217758 0.116759 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.84441e-08 ( -1.59471e-08 1.57744e-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 : -0.107897 ( 0.107511 0.107511 )
beta : 0.516511 ( -0.990434 2.07632 )
Epeak [keV] : 22.3662 ( -22.3688 -22.3688 )
Norm@50keV : 2.21765E-03 ( 1684.47 -0.00221796 )
------------------------------------------------------------
# Chi-Squared = 54.55 using 59 PHA bins.
# Reduced chi-squared = 0.9918 for 55 degrees of freedom
# Null hypothesis probability = 4.917091e-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:
Sun Jun 21 05:57:57 EDT 2009