batgrbproduct Analysis for Trigger=352930
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 23 20:02:24 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger352930/GCN5_download_cron
======================================================================
Trigger: 00352930 Segment: 000
BAT Trigger Time: 264751891.008 [s; MET]
Trigger Stop: 264751892.032 [s; MET]
UTC: 2009-05-23T06:11:26.243320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.090213676428 Dec: 51.8027179151125 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.65
Image Trigger?: NO
Rate S/N Ratio: 11.0905365064094 [ if not an image trigger ]
Image S/N Ratio: 5.65
Flight Position: [ source = BAT ]
RA: 299.090213676428 Dec: 51.8027179151125 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 298.99485916518 Dec: 51.87331044675 [deg; J2000]
{ 19h 55m 58.8s , +51d 52' 23.9" }
+/- 5.20121595845628 [arcmin] (estimated 90% radius based on SNR)
+/- 4.75518966274196 [arcmin] (formal 1-sigma fit error)
SNR: 2.88477137134119
Angular difference between Flight and Ground position is 5.516956 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 1.02400001883507 +/-
Measured from: 0
to: 1.02400001883507 [s; relative to TRIGTIME]
T50: 1.02400001883507 +/-
Measured from: 0
to: 1.02400001883507 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02400001883507 second)
Measured from: -1.49011611938477e-08
to: 1.02400000393391 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02400001883507 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.000923 -0.006398 0.019173 0.020391
0.006259 0.006384 0.006298 0.006617 [error]
Peak 0.000923 -0.006398 0.019173 0.020391
0.006259 0.006384 0.006298 0.006617 [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 1.21e-10 9.11e-10 6.08e-09 2.14e-07 2.17e-08 2.23e-07 erg/cm2
Error 4.71e-10 1.60e-09 5.87e-09 3.13e-07 1.93e-08 3.16e-07 erg/cm2
Peak flux Power-law 3.63e-03 1.44e-02 4.81e-02 5.38e-01 1.37e-01 6.06e-01 ph/cm2/s
Error 1.45e-02 2.64e-02 4.71e-02 7.32e-01 1.28e-01 7.62e-01 ph/cm2/s
Fluence Cutoff-PL 7.75e-11 1.09e-09 8.46e-09 3.68e-08 2.28e-08 5.36e-08 erg/cm2
Error 3.89e-10 1.67e-09 7.72e-09 4.91e-07 1.72e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.26e-03 1.68e-02 6.74e-02 1.36e-01 1.52e-01 2.32e-01 ph/cm2/s
Error 1.18e-02 2.64e-02 6.26e-02 1.10e+00 1.11e-01 7.77e-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 -0.659 0.417 - - 7.60e-04 9.60e-04 57.270 57
CPL -4.989 0.000 109.7 193.5 2.94e-02 1.23e-01 55.840 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.659 0.417 - - 7.60e-04 9.60e-04 57.270 57
CPL -4.989 0.000 109.7 193.5 2.94e-02 1.23e-01 55.840 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
298.9949 +51.8733 0.0666 7.3 -63.4 0.0373 2.9 TRIG_00352930
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-41.607 -11.008 (delta_t = 30.599 [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: -0.659120 ( 0.6754 1.50979 )
Norm@50keV : 7.60486E-04 ( -0.000744281 0.001175 )
------------------------------------------------------------
# Chi-Squared = 57.27 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 57 degrees of freedom
# Null hypothesis probability = 4.650859e-01
Photon flux (15-150 keV) in 1.024 sec: 0.136527 ( -0.136527 0.119985 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.1686e-08 ( -2.1686e-08 1.68711e-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: -4.98897 ( )
Epeak [keV] : 109.652 ( -109.653 277.423 )
Norm@50keV : 2.94260E-02 ( -0.0294235 0.215966 )
------------------------------------------------------------
# Chi-Squared = 55.84 using 59 PHA bins.
# Reduced chi-squared = 0.9971 for 56 degrees of freedom
# Null hypothesis probability = 4.809733e-01
Photon flux (15-150 keV) in 1.024 sec: 0.151855 ( -0.110527 0.111227 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.27796e-08 ( -1.68629e-08 1.74775e-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 : 5.00000 ( -2.00485e+06 -2.00485e+06 )
beta : -1.57938 ( 1.50276 3.49396 )
Epeak [keV] : 108.289 ( -108.228 208.426 )
Norm@50keV : 3.05684E-02 ( -0.0306231 3524.12 )
------------------------------------------------------------
# Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.481738e-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: -0.659120 ( 0.6754 1.50979 )
Norm@50keV : 7.60486E-04 ( -0.000744281 0.001175 )
------------------------------------------------------------
# Chi-Squared = 57.27 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 57 degrees of freedom
# Null hypothesis probability = 4.650859e-01
Photon flux (15-150 keV) in 1.024 sec: 0.136527 ( -0.136527 0.119985 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.1686e-08 ( -2.1686e-08 1.68711e-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: -4.98897 ( )
Epeak [keV] : 109.652 ( -109.653 277.423 )
Norm@50keV : 2.94260E-02 ( -0.0294235 0.215966 )
------------------------------------------------------------
# Chi-Squared = 55.84 using 59 PHA bins.
# Reduced chi-squared = 0.9971 for 56 degrees of freedom
# Null hypothesis probability = 4.809733e-01
Photon flux (15-150 keV) in 1.024 sec: 0.151855 ( -0.110527 0.111227 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.27796e-08 ( -1.68629e-08 1.74775e-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 : 5.00000 ( -2.00485e+06 -2.00485e+06 )
beta : -1.57938 ( 1.50276 3.49396 )
Epeak [keV] : 108.289 ( -108.228 208.426 )
Norm@50keV : 3.05684E-02 ( -0.0306231 3524.12 )
------------------------------------------------------------
# Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.481738e-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:
Sat May 23 20:12:57 EDT 2009