batgrbproduct Analysis for Trigger=383050
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 Jan 19 22:07:36 EST 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger383050/GCN5_download_cron
======================================================================
Trigger: 00383050 Segment: 000
BAT Trigger Time: 285603672 [s; MET]
Trigger Stop: 285604912 [s; MET]
UTC: 2010-01-19T14:21:06.547380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 248.522317735683 Dec: -47.3672968234157 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.57
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.57
Flight Position: [ source = BAT ]
RA: 248.522317735683 Dec: -47.3672968234157 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 248.523317189619 Dec: -47.4747580396951 [deg; J2000]
{ 16h 34m 05.6s , -47d 28' 29.1" }
+/- 3.4384643170891 [arcmin] (estimated 90% radius based on SNR)
+/- 2.09558094796447 [arcmin] (formal 1-sigma fit error)
SNR: 5.21054737450604
Angular difference between Flight and Ground position is 6.447801 arcmin
Partial Coding Fraction: 0.6875 [ including projection effects ]
Duration
T90: 1240 +/-
Measured from: 0
to: 1240 [s; relative to TRIGTIME]
T50: 1240 +/-
Measured from: 0
to: 1240 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1240 second)
Measured from: 0
to: 1240 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1240 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.459497 1.292455 0.311592 0.330378
0.257965 0.233371 0.201609 0.181596 [error]
Peak 1.459497 1.292455 0.311592 0.330378
0.257965 0.233371 0.201609 0.181596 [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 5.05e-07 5.18e-07 3.74e-07 4.33e-07 1.57e-06 1.83e-06 erg/cm2
Error 1.32e-07 1.22e-07 1.75e-07 3.93e-07 4.08e-07 6.40e-07 erg/cm2
Peak flux Power-law 1.73e-02 9.90e-03 3.57e-03 1.70e-03 3.17e-02 3.25e-02 ph/cm2/s
Error 4.63e-03 2.25e-03 1.61e-03 1.76e-03 6.55e-03 6.76e-03 ph/cm2/s
Fluence Cutoff-PL 4.95e-07 5.57e-07 3.13e-07 9.28e-08 1.43e-06 1.46e-06 erg/cm2
Error 1.41e-07 1.64e-07 2.35e-07 4.50e-07 4.68e-07 7.39e-07 erg/cm2
Peak flux Cutoff-PL 1.68e-02 1.06e-02 3.08e-03 4.65e-04 3.09e-02 3.10e-02 ph/cm2/s
Error 5.00e-03 3.06e-03 2.59e-03 1.69e-03 6.78e-03 7.36e-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 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 2.469 0.467 - - 1.64e-04 5.63e-05 39.510 57
CPL 1.710 0.000 13.0 0.0 5.13e-04 0.00e+00 39.210 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.469 0.467 - - 1.64e-04 5.63e-05 39.510 57
CPL 1.710 0.000 13.0 0.0 5.13e-04 0.00e+00 39.210 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 1240.000 0.000 1240.000
T90 1240.000 0.000 1240.000
T50 1240.000 0.000 1240.000
Peak 1240.000 0.000 1240.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
248.5233 -47.4748 0.0367 34.2 -26.5 4.8147 5.2 TRIG_00383050
------------------------------------------
Foreground time interval of the image:
0.000 253.800 (delta_t = 253.800 [sec])
255.000 507.370 (delta_t = 252.370 [sec])
508.000 939.290 (delta_t = 431.290 [sec])
940.000 963.079 (delta_t = 23.079 [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 253.800000
255.000000 507.370000
508.000000 939.290000
940.000000 963.079200
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46914 ( -0.42926 0.505462 )
Norm@50keV : 1.64414E-04 ( -5.66517e-05 5.59573e-05 )
------------------------------------------------------------
# Chi-Squared = 39.51 using 59 PHA bins.
# Reduced chi-squared = 0.6931 for 57 degrees of freedom
# Null hypothesis probability = 9.624658e-01
Photon flux (15-150 keV) in 960.5 sec: 3.16976E-02 ( -0.00655268 0.00655268 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.5664e-06 ( -3.94798e-07 4.20631e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 253.800000
255.000000 507.370000
508.000000 939.290000
940.000000 963.079200
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70971 ( )
Epeak [keV] : 13.0449 ( )
Norm@50keV : 5.12546E-04 ( )
------------------------------------------------------------
# Chi-Squared = 39.21 using 59 PHA bins.
# Reduced chi-squared = 0.7001 for 56 degrees of freedom
# Null hypothesis probability = 9.569013e-01
Photon flux (15-150 keV) in 960.5 sec: 3.09366E-02 ( -0.0067985 0.0067702 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43409e-06 ( -4.08116e-07 5.28189e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 253.800000
255.000000 507.370000
508.000000 939.290000
940.000000 963.079200
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.45774 ( 1.55881 1.55881 )
beta : -3.02592 ( 2.8908 0.818573 )
Epeak [keV] : 16.9939 ( -14.6671 64.9766 )
Norm@50keV : 7.85935E-04 ( -0.000370121 58.1947 )
------------------------------------------------------------
# Chi-Squared = 39.02 using 59 PHA bins.
# Reduced chi-squared = 0.7094 for 55 degrees of freedom
# Null hypothesis probability = 9.492575e-01
Photon flux (15-150 keV) in 960.5 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 940.000 sec. to 963.079 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46914 ( -0.42926 0.505462 )
Norm@50keV : 1.64414E-04 ( -5.66517e-05 5.59573e-05 )
------------------------------------------------------------
# Chi-Squared = 39.51 using 59 PHA bins.
# Reduced chi-squared = 0.6931 for 57 degrees of freedom
# Null hypothesis probability = 9.624658e-01
Photon flux (15-150 keV) in 960.5 sec: 3.16976E-02 ( -0.00655268 0.00655268 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.5664e-06 ( -3.94798e-07 4.20631e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 940.000 sec. to 963.079 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70971 ( )
Epeak [keV] : 13.0449 ( )
Norm@50keV : 5.12546E-04 ( )
------------------------------------------------------------
# Chi-Squared = 39.21 using 59 PHA bins.
# Reduced chi-squared = 0.7001 for 56 degrees of freedom
# Null hypothesis probability = 9.569013e-01
Photon flux (15-150 keV) in 960.5 sec: 3.09366E-02 ( -0.0067985 0.0067702 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43409e-06 ( -4.08116e-07 5.28189e-07 ) ergs/cm2
Band function
Time interval is from 940.000 sec. to 963.079 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.45145 ( 1.55881 1.55881 )
beta : -3.02995 ( 2.8908 0.818573 )
Epeak [keV] : 17.1600 ( -14.6671 64.9766 )
Norm@50keV : 7.91758E-04 ( -0.00037957 58.188 )
------------------------------------------------------------
# Chi-Squared = 39.01 using 59 PHA bins.
# Reduced chi-squared = 0.7094 for 55 degrees of freedom
# Null hypothesis probability = 9.492979e-01
Photon flux (15-150 keV) in 960.5 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue Jan 19 22:23:47 EST 2010