batgrbproduct Analysis for Trigger=356516
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 Jul 5 18:03:11 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger356516/GCN5_download_cron
======================================================================
Trigger: 00356516 Segment: 000
BAT Trigger Time: 268463496 [s; MET]
Trigger Stop: 268463560 [s; MET]
UTC: 2009-07-05T05:11:31.116000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 318.484499859067 Dec: 62.5784594775142 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.02
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.02
Flight Position: [ source = BAT ]
RA: 318.484499859067 Dec: 62.5784594775142 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 318.291713630836 Dec: 62.4874232551467 [deg; J2000]
{ 21h 13m 10.0s , +62d 29' 14.7" }
+/- 5.00151989899859 [arcmin] (estimated 90% radius based on SNR)
+/- 3.58990081824373 [arcmin] (formal 1-sigma fit error)
SNR: 3.05071217777573
Angular difference between Flight and Ground position is 7.635436 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.183874 0.131481 -0.012467 -0.040437
0.040813 0.042694 0.038701 0.035873 [error]
Peak 0.183874 0.131481 -0.012467 -0.040437
0.040813 0.042694 0.038701 0.035873 [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 4.43e-08 4.79e-08 3.66e-08 4.50e-08 1.45e-07 1.77e-07 erg/cm2
Error 1.68e-08 1.89e-08 2.48e-08 5.81e-08 6.42e-08 9.98e-08 erg/cm2
Peak flux Power-law 2.32e-02 1.35e-02 5.17e-03 2.61e-03 4.30e-02 4.48e-02 ph/cm2/s
Error 8.73e-03 5.28e-03 4.50e-03 3.44e-03 1.51e-02 1.60e-02 ph/cm2/s
Fluence Cutoff-PL 4.33e-08 7.25e-08 1.70e-08 1.84e-10 1.33e-07 1.33e-07 erg/cm2
Error 1.87e-08 2.86e-08 2.51e-08 5.30e-09 4.97e-08 4.97e-08 erg/cm2
Peak flux Cutoff-PL 2.14e-02 2.09e-02 2.78e-03 1.66e-05 4.51e-02 4.50e-02 ph/cm2/s
Error 9.70e-03 7.78e-03 3.78e-03 4.15e-04 1.41e-02 1.41e-02 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 4.59e-02 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 2.403 0.622 - - 2.32e-04 1.80e-04 81.300 57
CPL -1.438 0.667 30.4 10.8 7.80e-02 8.81e+00 75.330 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.403 0.622 - - 2.32e-04 1.80e-04 81.300 57
CPL -1.438 0.667 30.4 10.8 7.80e-02 8.81e+00 75.330 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
318.2917 +62.4874 0.0626 23.4 -13.6 0.2767 3.1 TRIG_00356516
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.40252 ( -0.548539 0.6951 )
Norm@50keV : 2.32145E-04 ( -0.000232533 0.000128064 )
------------------------------------------------------------
# Chi-Squared = 81.30 using 59 PHA bins.
# Reduced chi-squared = 1.426 for 57 degrees of freedom
# Null hypothesis probability = 1.897067e-02
Photon flux (15-150 keV) in 64 sec: 4.30396E-02 ( -0.0150656 0.0151708 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45448e-07 ( -5.99044e-08 6.84506e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.43755 ( 1.48094 2.81563 )
Epeak [keV] : 30.3521 ( -11.5085 10.1661 )
Norm@50keV : 7.80469E-02 ( -0.0933034 17.5282 )
------------------------------------------------------------
# Chi-Squared = 75.33 using 59 PHA bins.
# Reduced chi-squared = 1.345 for 56 degrees of freedom
# Null hypothesis probability = 4.344585e-02
Photon flux (15-150 keV) in 64 sec: 4.50638E-02 ( -0.0140374 0.014214 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33004e-07 ( -4.64621e-08 5.28384e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.37083 ( -2.74779 -1.37083 )
beta : -9.37167 ( 10 19.9993 )
Epeak [keV] : 30.5834 ( -11.7931 10.0016 )
Norm@50keV : 6.98668E-02 ( -0.069016 47.5261 )
------------------------------------------------------------
# Chi-Squared = 75.35 using 59 PHA bins.
# Reduced chi-squared = 1.370 for 55 degrees of freedom
# Null hypothesis probability = 3.559696e-02
Photon flux (15-150 keV) in 64 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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.40252 ( -0.548539 0.6951 )
Norm@50keV : 2.32145E-04 ( -0.000232533 0.000128064 )
------------------------------------------------------------
# Chi-Squared = 81.30 using 59 PHA bins.
# Reduced chi-squared = 1.426 for 57 degrees of freedom
# Null hypothesis probability = 1.897067e-02
Photon flux (15-150 keV) in 64 sec: 4.30396E-02 ( -0.0150656 0.0151708 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45448e-07 ( -5.99044e-08 6.84506e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.43755 ( 1.48094 2.81563 )
Epeak [keV] : 30.3521 ( -11.5085 10.1661 )
Norm@50keV : 7.80469E-02 ( -0.0933034 17.5282 )
------------------------------------------------------------
# Chi-Squared = 75.33 using 59 PHA bins.
# Reduced chi-squared = 1.345 for 56 degrees of freedom
# Null hypothesis probability = 4.344585e-02
Photon flux (15-150 keV) in 64 sec: 4.50638E-02 ( -0.0140374 0.014214 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33004e-07 ( -4.64621e-08 5.28384e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.37083 ( -2.74779 -1.37083 )
beta : -9.37167 ( 10 19.9993 )
Epeak [keV] : 30.5834 ( -11.7931 10.0016 )
Norm@50keV : 6.98668E-02 ( -0.069016 47.5261 )
------------------------------------------------------------
# Chi-Squared = 75.35 using 59 PHA bins.
# Reduced chi-squared = 1.370 for 55 degrees of freedom
# Null hypothesis probability = 3.559696e-02
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sun Jul 5 18:25:39 EDT 2009