batgrbproduct Analysis for Trigger=352190
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 v2.44
Process Start Time (local time): Sun May 17 11:58:25 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger352190/SDC
======================================================================
Trigger: 00352190 Segment: 000
BAT Trigger Time: 264155275.52 [s; MET]
Trigger Stop: 264155302.4 [s; MET]
UTC: 2009-05-16T08:27:50.774420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 138.27070715192 Dec: -11.8577686574517 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.83
Image Trigger?: NO
Rate S/N Ratio: 14.1067359796659 [ if not an image trigger ]
Image S/N Ratio: 8.83
Flight Position: [ source = BAT ]
RA: 138.27070715192 Dec: -11.8577686574517 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 138.246412744093 Dec: -11.8476236775837 [deg; J2000]
{ 09h 12m 59.1s , -11d 50' 51.4" }
+/- 1.54024509503246 [arcmin] (estimated 90% radius based on SNR)
+/- 0.574415654159173 [arcmin] (formal 1-sigma fit error)
SNR: 16.4109190110498
Angular difference between Flight and Ground position is 1.551019 arcmin
Partial Coding Fraction: 0.09179688 [ including projection effects ]
Duration
T90: 208 +/- 64
Measured from: -15.5200000107288
to: 192.479999989271 [s; relative to TRIGTIME]
T50: 80 +/- 16
Measured from: 0.479999989271164
to: 80.4799999892712 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.97999998927116
to: 8.97999998927116 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.5200000107288
to: 288.479999989271 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.681278 4.707469 3.387176 1.048473
0.239569 0.244326 0.227702 0.211822 [error]
Peak 0.520614 0.923834 0.814204 0.148477
0.088970 0.091650 0.085861 0.078551 [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 1.73e-06 2.58e-06 2.88e-06 6.08e-06 9.02e-06 1.33e-05 erg/cm2
Error 1.82e-07 1.61e-07 2.42e-07 1.10e-06 5.71e-07 1.29e-06 erg/cm2
Peak flux Power-law 5.89e-01 5.32e-01 3.31e-01 3.14e-01 1.58e+00 1.77e+00 ph/cm2/s
Error 1.16e-01 6.49e-02 4.66e-02 8.93e-02 1.90e-01 1.98e-01 ph/cm2/s
Fluence Cutoff-PL 1.72e-06 2.58e-06 2.88e-06 6.04e-06 9.02e-06 1.32e-05 erg/cm2
Error 1.82e-07 1.61e-07 2.43e-07 1.10e-06 5.71e-07 1.28e-06 erg/cm2
Peak flux Cutoff-PL 4.87e-01 5.63e-01 3.60e-01 1.56e-01 1.51e+00 1.57e+00 ph/cm2/s
Error 1.48e-01 7.51e-02 5.74e-02 1.22e-01 2.02e-01 2.42e-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 1.58e+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 1.841 0.113 - - 3.24e-03 2.03e-04 59.250 57
CPL 2.261 0.000 105.6 0.0 1.93e-03 0.00e+00 58.800 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.684 0.194 - - 1.20e-02 1.38e-03 49.430 57
CPL 0.839 0.936 73.2 312.5 3.03e-02 3.94e-02 46.520 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: 97.536000 sec.
T50 in the 50-300 keV band: 30.336000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 304.000 -15.520 288.480
T90 208.000 -15.520 192.480
T50 80.000 0.480 80.480
Peak 1.000 7.980 8.980
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
138.2464 -11.8476 0.0117 58.2 -164.3 9.2720 16.4 TRIG_00352190
------------------------------------------
Foreground time interval of the image:
-15.520 42.480 (delta_t = 58.000 [sec])
43.480 80.781 (delta_t = 37.301 [sec])
Background time interval of the image:
-239.520 -15.520 (delta_t = 224.000 [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
Multiple GTIs in the spectrum
tstart tstop
-15.520000 42.480000
43.480000 288.480000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84063 ( -0.112271 0.114536 )
Norm@50keV : 3.23711E-03 ( -0.000203479 0.000202181 )
------------------------------------------------------------
# Chi-Squared = 59.25 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 57 degrees of freedom
# Null hypothesis probability = 3.934059e-01
Photon flux (15-150 keV) in 303 sec: 0.453289 ( -0.0293491 0.0294868 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.02001e-06 ( -5.69955e-07 5.72425e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-15.520000 42.480000
43.480000 288.480000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.26071 ( )
Epeak [keV] : 105.554 ( )
Norm@50keV : 1.92543E-03 ( )
------------------------------------------------------------
# Chi-Squared = 58.80 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 56 degrees of freedom
# Null hypothesis probability = 3.733048e-01
Photon flux (15-150 keV) in 303 sec: 0.453062 ( -0.029334 0.029473 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.0211e-06 ( -5.70125e-07 5.72609e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-15.520000 42.480000
43.480000 288.480000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.69166 ( 1.69166 1.69166 )
beta : -1.84062 ( -0.115065 0.112263 )
Epeak [keV] : 24.9425 ( -24.9424 384.755 )
Norm@50keV : 4.64416E-03 ( -0.0014169 0.461498 )
------------------------------------------------------------
# Chi-Squared = 59.25 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 55 degrees of freedom
# Null hypothesis probability = 3.232631e-01
Photon flux (15-150 keV) in 303 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 0.480 sec. to 16.480 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68356 ( -0.19095 0.196112 )
Norm@50keV : 1.19922E-02 ( -0.0013782 0.00137198 )
------------------------------------------------------------
# Chi-Squared = 49.43 using 59 PHA bins.
# Reduced chi-squared = 0.8672 for 57 degrees of freedom
# Null hypothesis probability = 7.517657e-01
Photon flux (15-150 keV) in 16 sec: 1.58367 ( -0.189162 0.19031 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.77893e-06 ( -2.11362e-07 2.12379e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.480 sec. to 16.480 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.838937 ( -1.03011 0.841314 )
Epeak [keV] : 73.1555 ( -17.1635 607.744 )
Norm@50keV : 3.03313E-02 ( -0.0180683 0.0606532 )
------------------------------------------------------------
# Chi-Squared = 46.52 using 59 PHA bins.
# Reduced chi-squared = 0.8308 for 56 degrees of freedom
# Null hypothesis probability = 8.126423e-01
Photon flux (15-150 keV) in 16 sec: 1.51297 ( -0.20097 0.20231 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71405e-06 ( -2.24483e-07 2.2408e-07 ) ergs/cm2
Band function
Time interval is from 0.480 sec. to 16.480 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.839225 ( -0.519342 1.04859 )
beta : -10.00000 ( 8.31455e+10 8.31455e+10 )
Epeak [keV] : 73.1563 ( -17.1753 608.779 )
Norm@50keV : 3.03185E-02 ( -0.0180628 0.0607145 )
------------------------------------------------------------
# Chi-Squared = 46.52 using 59 PHA bins.
# Reduced chi-squared = 0.8459 for 55 degrees of freedom
# Null hypothesis probability = 7.850800e-01
Photon flux (15-150 keV) in 16 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sun May 17 12:23:18 EDT 2009