batgrbproduct Analysis for Trigger=359378
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): Sat Aug 8 02:23:55 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger359378/GCN5_download_cron
======================================================================
Trigger: 00359378 Segment: 000
BAT Trigger Time: 271350032 [s; MET]
Trigger Stop: 271350096 [s; MET]
UTC: 2009-08-07T15:00:27.022480 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 273.744300314753 Dec: 10.2809416544568 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13.18
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 13.18
Flight Position: [ source = BAT ]
RA: 273.744300314753 Dec: 10.2809416544568 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 273.744285339424 Dec: 10.2862098730354 [deg; J2000]
{ 18h 14m 58.6s , +10d 17' 10.4" }
+/- 1.8516085467428 [arcmin] (estimated 90% radius based on SNR)
+/- 0.75555973523223 [arcmin] (formal 1-sigma fit error)
SNR: 12.6155233086919
Angular difference between Flight and Ground position is 0.316094 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 132.815999925137 +/- 9.19314047743804
Measured from: 13.5600001215935
to: 146.37600004673 [s; relative to TRIGTIME]
T50: 76.5279999375343 +/- 16.0889815450985
Measured from: 42.1560001373291
to: 118.684000074863 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 41.9639999866486
to: 42.9639999866486 [s; relative to TRIGTIME]
Total Fluence
Measured from: 5.9200000166893
to: 151.487999975681 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.630283 1.674717 0.686811 0.097632
0.097029 0.090567 0.081688 0.085267 [error]
Peak 0.029120 0.029771 0.022922 0.010096
0.008855 0.008111 0.007609 0.007775 [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 5.71e-07 6.72e-07 5.71e-07 8.22e-07 2.11e-06 2.64e-06 erg/cm2
Error 5.70e-08 4.69e-08 7.52e-08 2.13e-07 1.69e-07 2.99e-07 erg/cm2
Peak flux Power-law 3.03e-01 2.42e-01 1.30e-01 1.02e-01 7.21e-01 7.77e-01 ph/cm2/s
Error 1.38e-01 6.96e-02 6.45e-02 1.07e-01 2.09e-01 2.27e-01 ph/cm2/s
Fluence Cutoff-PL 5.38e-07 7.21e-07 5.25e-07 2.37e-07 1.94e-06 2.02e-06 erg/cm2
Error 6.38e-08 6.22e-08 9.48e-08 2.80e-07 2.05e-07 3.61e-07 erg/cm2
Peak flux Cutoff-PL 3.03e-01 2.42e-01 1.30e-01 1.01e-01 7.21e-01 7.76e-01 ph/cm2/s
Error 1.38e-01 6.96e-02 6.45e-02 1.06e-01 2.08e-01 2.27e-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 2.236 0.144 - - 1.53e-03 1.44e-04 71.700 57
CPL 1.521 0.610 26.1 0.0 4.07e-03 0.00e+00 67.440 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.896 0.636 - - 5.03e-03 1.86e-03 51.010 57
CPL 2.666 0.000 220.3 0.0 2.06e-03 0.00e+00 50.420 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 145.568 5.920 151.488
T90 132.816 13.560 146.376
T50 76.528 42.156 118.684
Peak 1.000 41.964 42.964
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
273.7443 +10.2862 0.0152 31.9 18.6 1.9459 12.6 TRIG_00359378
------------------------------------------
Foreground time interval of the image:
5.920 73.501 (delta_t = 67.581 [sec])
Background time interval of the image:
-239.000 5.920 (delta_t = 244.920 [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 5.920 sec. to 151.488 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.23647 ( -0.14125 0.146642 )
Norm@50keV : 1.53074E-03 ( -0.00014487 0.000143101 )
------------------------------------------------------------
# Chi-Squared = 71.70 using 59 PHA bins.
# Reduced chi-squared = 1.258 for 57 degrees of freedom
# Null hypothesis probability = 9.091865e-02
Photon flux (15-150 keV) in 145.6 sec: 0.258378 ( -0.0179974 0.0180206 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.10689e-06 ( -1.6781e-07 1.70685e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.920 sec. to 151.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52094 ( -0.7194 0.500537 )
Epeak [keV] : 26.1242 ( )
Norm@50keV : 4.07482E-03 ( )
------------------------------------------------------------
# Chi-Squared = 67.44 using 59 PHA bins.
# Reduced chi-squared = 1.204 for 56 degrees of freedom
# Null hypothesis probability = 1.407060e-01
Photon flux (15-150 keV) in 145.6 sec: 0.249009 ( -0.019415 0.019474 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.94203e-06 ( -1.98686e-07 2.12241e-07 ) ergs/cm2
Band function
Time interval is from 5.920 sec. to 151.488 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.49068 ( -0.307047 0.569418 )
beta : -10.00000 ( 1.33865e+12 1.33865e+12 )
Epeak [keV] : 26.6010 ( -23.1572 11.6879 )
Norm@50keV : 4.24725E-03 ( -0.00210975 0.00679555 )
------------------------------------------------------------
# Chi-Squared = 67.45 using 59 PHA bins.
# Reduced chi-squared = 1.226 for 55 degrees of freedom
# Null hypothesis probability = 1.210138e-01
Photon flux (15-150 keV) in 145.6 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 41.964 sec. to 42.964 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89554 ( -0.598132 0.674094 )
Norm@50keV : 5.03402E-03 ( -0.00194448 0.00177668 )
------------------------------------------------------------
# Chi-Squared = 51.01 using 59 PHA bins.
# Reduced chi-squared = 0.8949 for 57 degrees of freedom
# Null hypothesis probability = 6.981271e-01
Photon flux (15-150 keV) in 1 sec: 0.721077 ( -0.208323 0.208691 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.62794e-08 ( -1.61341e-08 1.73569e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 41.964 sec. to 42.964 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.66595 ( )
Epeak [keV] : 220.346 ( )
Norm@50keV : 2.06049E-03 ( )
------------------------------------------------------------
# Chi-Squared = 50.42 using 59 PHA bins.
# Reduced chi-squared = 0.9004 for 56 degrees of freedom
# Null hypothesis probability = 6.851818e-01
Photon flux (15-150 keV) in 1 sec: 0.720760 ( -0.208247 0.208616 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.62671e-08 ( -1.61321e-08 1.73579e-08 ) ergs/cm2
Band function
Time interval is from 41.964 sec. to 42.964 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99984 ( -12045.6 -12045.6 )
beta : -1.89581 ( -0.726425 0.595749 )
Epeak [keV] : 16.5390 ( -16.5348 16.2746 )
Norm@50keV : 1.13649E+04 ( -11403.8 5.49329e+06 )
------------------------------------------------------------
# Chi-Squared = 50.98 using 59 PHA bins.
# Reduced chi-squared = 0.9270 for 55 degrees of freedom
# Null hypothesis probability = 6.288187e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sat Aug 8 02:46:12 EDT 2009