batgrbproduct Analysis for Trigger=377436
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): Tue Dec 1 08:32:39 EST 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger377436/GCN5_download_cron
======================================================================
Trigger: 00377436 Segment: 000
BAT Trigger Time: 281290096 [s; MET]
Trigger Stop: 281290496 [s; MET]
UTC: 2009-11-30T16:08:10.693340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 161.881491409738 Dec: 11.6255417298906 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.13
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.13
Flight Position: [ source = BAT ]
RA: 161.881491409738 Dec: 11.6255417298906 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 161.870517357678 Dec: 11.5733394215681 [deg; J2000]
{ 10h 47m 28.9s , +11d 34' 24.0" }
+/- 4.50485413241736 [arcmin] (estimated 90% radius based on SNR)
+/- 2.2006819124117 [arcmin] (formal 1-sigma fit error)
SNR: 3.54232791322225
Angular difference between Flight and Ground position is 3.197860 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 400 +/-
Measured from: 0
to: 400 [s; relative to TRIGTIME]
T50: 400 +/-
Measured from: 0
to: 400 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 400 second)
Measured from: 0
to: 400 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 400 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.368852 0.301226 0.206107 -0.052568
0.077891 0.081902 0.075198 0.072444 [error]
Peak 0.368852 0.301226 0.206107 -0.052568
0.077891 0.081902 0.075198 0.072444 [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 8.76e-08 1.27e-07 1.36e-07 2.72e-07 4.35e-07 6.23e-07 erg/cm2
Error 3.06e-08 3.53e-08 6.54e-08 3.09e-07 1.54e-07 3.40e-07 erg/cm2
Peak flux Power-law 1.18e-02 9.39e-03 5.05e-03 3.96e-03 2.80e-02 3.02e-02 ph/cm2/s
Error 4.19e-03 2.58e-03 2.35e-03 4.24e-03 7.59e-03 8.63e-03 ph/cm2/s
Fluence Cutoff-PL 8.55e-08 1.42e-07 1.18e-07 4.74e-08 3.80e-07 3.93e-07 erg/cm2
Error 3.24e-08 4.92e-08 1.00e-07 2.75e-07 1.79e-07 3.68e-07 erg/cm2
Peak flux Cutoff-PL 1.14e-02 1.05e-02 4.54e-03 9.30e-04 2.72e-02 2.74e-02 ph/cm2/s
Error 4.42e-03 3.65e-03 3.47e-03 3.81e-03 5.75e-03 9.03e-03 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 1.14e-02 1.03e-02 2.81e-02 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 9.16e-03 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 1.896 0.505 - - 1.96e-04 6.99e-05 56.270 57
CPL 1.070 1.391 41.6 0.0 6.47e-04 0.00e+00 55.560 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.896 0.505 - - 1.96e-04 6.99e-05 56.270 57
CPL 1.070 1.391 41.6 0.0 6.47e-04 0.00e+00 55.560 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 400.000 0.000 400.000
T90 400.000 0.000 400.000
T50 400.000 0.000 400.000
Peak 400.000 0.000 400.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
161.8705 +11.5733 0.0537 14.9 -42.5 0.7558 3.5 TRIG_00377436
------------------------------------------
Foreground time interval of the image:
0.000 235.630 (delta_t = 235.630 [sec])
237.000 243.084 (delta_t = 6.083 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 235.630000
237.000000 243.083500
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89552 ( -0.472188 0.537541 )
Norm@50keV : 1.95578E-04 ( -7.10391e-05 6.8808e-05 )
------------------------------------------------------------
# Chi-Squared = 56.27 using 59 PHA bins.
# Reduced chi-squared = 0.9872 for 57 degrees of freedom
# Null hypothesis probability = 5.023283e-01
Photon flux (15-150 keV) in 241.7 sec: 2.80142E-02 ( -0.00758753 0.00759761 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.34584e-07 ( -1.4719e-07 1.60745e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 235.630000
237.000000 243.083500
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.07029 ( -1.06969 1.71248 )
Epeak [keV] : 41.6358 ( )
Norm@50keV : 6.47176E-04 ( )
------------------------------------------------------------
# Chi-Squared = 55.56 using 59 PHA bins.
# Reduced chi-squared = 0.9921 for 56 degrees of freedom
# Null hypothesis probability = 4.915597e-01
Photon flux (15-150 keV) in 241.7 sec: 2.71938E-02 ( -0.0076405 0.0038527 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.80022e-07 ( -1.68139e-07 1.90825e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 235.630000
237.000000 243.083500
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99867 ( -1452.15 -1437.17 )
beta : -2.39760 ( -1.85407 0.703241 )
Epeak [keV] : 25.0787 ( -7.39044 6.86668 )
Norm@50keV : 33.1417 ( -26.8228 212.824 )
------------------------------------------------------------
# Chi-Squared = 53.11 using 59 PHA bins.
# Reduced chi-squared = 0.9656 for 55 degrees of freedom
# Null hypothesis probability = 5.472648e-01
Photon flux (15-150 keV) in 241.7 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 237.000 sec. to 243.083 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89552 ( -0.472188 0.537541 )
Norm@50keV : 1.95578E-04 ( -7.10391e-05 6.8808e-05 )
------------------------------------------------------------
# Chi-Squared = 56.27 using 59 PHA bins.
# Reduced chi-squared = 0.9872 for 57 degrees of freedom
# Null hypothesis probability = 5.023283e-01
Photon flux (15-150 keV) in 241.7 sec: 2.80142E-02 ( -0.00758753 0.00759761 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.34584e-07 ( -1.4719e-07 1.60745e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 237.000 sec. to 243.083 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.07029 ( -1.06969 1.71248 )
Epeak [keV] : 41.6358 ( )
Norm@50keV : 6.47176E-04 ( )
------------------------------------------------------------
# Chi-Squared = 55.56 using 59 PHA bins.
# Reduced chi-squared = 0.9921 for 56 degrees of freedom
# Null hypothesis probability = 4.915597e-01
Photon flux (15-150 keV) in 241.7 sec: 2.71938E-02 ( -0.0076405 0.0038527 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.80022e-07 ( -1.68139e-07 1.90825e-07 ) ergs/cm2
Band function
Time interval is from 237.000 sec. to 243.083 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96897 ( -73.5487 -63.5498 )
beta : -2.36061 ( -1.92636 0.67739 )
Epeak [keV] : 24.2051 ( -3.81068 7.85235 )
Norm@50keV : 39.5310 ( -39.5976 15.8256 )
------------------------------------------------------------
# Chi-Squared = 53.20 using 59 PHA bins.
# Reduced chi-squared = 0.9673 for 55 degrees of freedom
# Null hypothesis probability = 5.436346e-01
Photon flux (15-150 keV) in 241.7 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue Dec 1 08:44:26 EST 2009