batgrbproduct Analysis for Trigger=352145
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): Sat May 16 17:32:05 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger352145/GCN5_download_cron
======================================================================
Trigger: 00352145 Segment: 000
BAT Trigger Time: 264124412.736 [s; MET]
Trigger Stop: 264124413.184 [s; MET]
UTC: 2009-05-15T23:53:27.991400 [includes UTCF correction]
Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 64 ms to TRIGTIME + 320 ms
BAT
RA: 43.1305464554517 Dec: -30.328275933199 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.86
Image Trigger?: NO
Rate S/N Ratio: 8.48528137423857 [ if not an image trigger ]
Image S/N Ratio: 5.86
Flight Position: [ source = BAT ]
RA: 43.1305464554517 Dec: -30.328275933199 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 43.052258368138 Dec: -30.3520349675905 [deg; J2000]
{ 02h 52m 12.5s , -30d 21' 07.3" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 25.380799146696 [arcmin] (formal 1-sigma fit error)
SNR: -0.434612531885248
Angular difference between Flight and Ground position is 4.297291 arcmin
Partial Coding Fraction: 0.6484375 [ including projection effects ]
Duration
T90: 0.448000013828278 +/-
Measured from: 0
to: 0.448000013828278 [s; relative to TRIGTIME]
T50: 0.448000013828278 +/-
Measured from: 0
to: 0.448000013828278 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.448000013828278 second)
Measured from: 0
to: 0.448000013828278 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.448000013828278 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.000423 -0.003452 0.002443 0.003111
0.004541 0.004535 0.003999 0.003809 [error]
Peak 0.000423 -0.003452 0.002443 0.003111
0.004541 0.004535 0.003999 0.003809 [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 1.03e-11 1.20e-10 1.27e-09 9.88e-08 5.58e-09 1.01e-07 erg/cm2
Error 9.51e-10 8.41e-10 2.22e-09 1.24e-07 7.31e-09 1.25e-07 erg/cm2
Peak flux Power-law 6.93e-04 4.23e-03 2.24e-02 5.37e-01 7.31e-02 5.66e-01 ph/cm2/s
Error 7.43e-02 3.29e-02 4.11e-02 6.64e-01 1.11e-01 6.91e-01 ph/cm2/s
Fluence Cutoff-PL 2.27e-12 1.77e-12 4.18e-11 8.96e-10 1.99e-07 5.52e-09 erg/cm2
Error 7.58e-10 2.24e-09 8.56e-07 7.55e-09 2.16e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 5.70e-04 3.66e-03 2.15e-02 6.00e-01 7.25e-02 4.40e-02 ph/cm2/s
Error 7.30e-02 3.22e-02 4.08e-02 7.40e-01 1.10e-01 0.00e+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 -1.361 0.000 - - 2.65e-04 9.38e-04 56.040 57
CPL 2.645 0.000 50.1 0.0 3.87e-34 0.00e+00 57.220 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.361 0.000 - - 2.65e-04 9.38e-04 56.040 57
CPL 2.645 0.000 50.1 0.0 3.87e-34 0.00e+00 57.220 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 0.448 0.000 0.448
T90 0.448 0.000 0.448
T50 0.448 0.000 0.448
Peak 0.448 0.000 0.448
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
43.0523 -30.3520 0.4431 37.8 -176.1 -0.0035 -0.4 TRIG_00352145
------------------------------------------
Foreground time interval of the image:
0.000 0.448 (delta_t = 0.448 [sec])
Background time interval of the image:
-60.736 -4.736 (delta_t = 56.000 [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 0.448 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.36122 ( 1.37361 1.37361 )
Norm@50keV : 2.65245E-04 ( -0.000258703 0.00161762 )
------------------------------------------------------------
# Chi-Squared = 56.04 using 59 PHA bins.
# Reduced chi-squared = 0.9832 for 57 degrees of freedom
# Null hypothesis probability = 5.110781e-01
Photon flux (15-150 keV) in 0.448 sec: 7.31213E-02 ( -0.0731213 0.148733 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.58235e-09 ( -5.58235e-09 9.04342e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.64499 ( )
Epeak [keV] : 50.0597 ( )
Norm@50keV : 3.87490E-34 ( )
------------------------------------------------------------
# Chi-Squared = 57.22 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 56 degrees of freedom
# Null hypothesis probability = 4.295557e-01
Photon flux (15-150 keV) in 0.448 sec: 7.25072E-02 ( -0.0725072 0.147057 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.51667e-09 ( -5.51667e-09 9.5803e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.321935 ( 0.29644 0.29644 )
beta : 1.33846 ( -1.37576 -1.37576 )
Epeak [keV] : 19.2965 ( -18.7804 -18.7804 )
Norm@50keV : 4.17582E-04 ( -0.000403773 1.72438e+06 )
------------------------------------------------------------
# Chi-Squared = 56.04 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 55 degrees of freedom
# Null hypothesis probability = 4.355238e-01
Photon flux (15-150 keV) in 0.448 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 0.448 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.36122 ( 1.37361 1.37361 )
Norm@50keV : 2.65245E-04 ( -0.000258703 0.00161762 )
------------------------------------------------------------
# Chi-Squared = 56.04 using 59 PHA bins.
# Reduced chi-squared = 0.9832 for 57 degrees of freedom
# Null hypothesis probability = 5.110781e-01
Photon flux (15-150 keV) in 0.448 sec: 7.31213E-02 ( -0.0731213 0.148733 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.58235e-09 ( -5.58235e-09 9.04342e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.64499 ( )
Epeak [keV] : 50.0597 ( )
Norm@50keV : 3.87490E-34 ( )
------------------------------------------------------------
# Chi-Squared = 57.22 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 56 degrees of freedom
# Null hypothesis probability = 4.295557e-01
Photon flux (15-150 keV) in 0.448 sec: 7.25072E-02 ( -0.0725072 0.147057 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.51667e-09 ( -5.51667e-09 9.5803e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.321935 ( 0.29644 0.29644 )
beta : 1.33846 ( -1.37576 -1.37576 )
Epeak [keV] : 19.2965 ( -18.7804 -18.7804 )
Norm@50keV : 4.17582E-04 ( -0.000403773 1.72438e+06 )
------------------------------------------------------------
# Chi-Squared = 56.04 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 55 degrees of freedom
# Null hypothesis probability = 4.355238e-01
Photon flux (15-150 keV) in 0.448 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sat May 16 17:53:10 EDT 2009