batgrbproduct Analysis for Trigger=361129
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 29 11:32:48 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger361129/GCN5_download_cron
======================================================================
Trigger: 00361129 Segment: 000
BAT Trigger Time: 273193768 [s; MET]
Trigger Stop: 273193832 [s; MET]
UTC: 2009-08-28T23:09:22.962180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 130.183833001623 Dec: -45.0606506650047 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 10.26
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.26
Flight Position: [ source = BAT ]
RA: 130.183833001623 Dec: -45.0606506650047 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 130.208134350172 Dec: -45.0657599441586 [deg; J2000]
{ 08h 40m 50.0s , -45d 03' 56.7" }
+/- 3.7893467734323 [arcmin] (estimated 90% radius based on SNR)
+/- 2.50445131746165 [arcmin] (formal 1-sigma fit error)
SNR: 4.53521498735645
Angular difference between Flight and Ground position is 1.074538 arcmin
Partial Coding Fraction: 0.7578125 [ including projection effects ]
Duration
T90: 196.139999985695 +/- 25.4336883035389
Measured from: 30.4960001111031
to: 226.636000096798 [s; relative to TRIGTIME]
T50: 137.007999956608 +/- 55.4721142509466
Measured from: 53.0840001106262
to: 190.092000067234 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 101.427999973297
to: 102.427999973297 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.87199997901917
to: 244.396000027657 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.417918 1.190735 0.078671 0.002990
0.094846 0.097920 0.086766 0.078563 [error]
Peak 0.020208 0.021254 0.010634 0.001210
0.006046 0.006509 0.005664 0.005200 [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 4.93e-07 4.38e-07 2.68e-07 2.48e-07 1.30e-06 1.45e-06 erg/cm2
Error 5.46e-08 5.06e-08 6.18e-08 1.03e-07 1.54e-07 2.09e-07 erg/cm2
Peak flux Power-law 2.03e-01 1.54e-01 7.78e-02 5.64e-02 4.61e-01 4.91e-01 ph/cm2/s
Error 9.09e-02 5.19e-02 4.38e-02 6.89e-02 1.54e-01 1.68e-01 ph/cm2/s
Fluence Cutoff-PL 4.64e-07 5.35e-07 9.94e-08 1.14e-09 1.10e-06 1.10e-06 erg/cm2
Error 6.09e-08 6.91e-08 6.67e-08 5.46e-09 1.27e-07 1.27e-07 erg/cm2
Peak flux Cutoff-PL 1.92e-01 1.71e-01 7.48e-02 1.79e-02 4.51e-01 4.56e-01 ph/cm2/s
Error 1.00e-01 8.01e-02 6.27e-02 6.56e-02 1.57e-01 1.79e-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 2.710 0.210 - - 4.96e-04 8.54e-05 68.770 57
CPL -0.400 1.782 24.1 3.7 6.35e-02 1.31e+00 48.580 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.984 0.647 - - 3.10e-03 1.36e-03 61.910 57
CPL 1.148 0.000 40.4 0.0 9.85e-03 0.00e+00 61.620 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 246.268 -1.872 244.396
T90 196.140 30.496 226.636
T50 137.008 53.084 190.092
Peak 1.000 101.428 102.428
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
130.2081 -45.0658 0.0422 31.0 -0.3 0.8605 4.5 TRIG_00361129
------------------------------------------
Foreground time interval of the image:
-1.872 152.401 (delta_t = 154.273 [sec])
Background time interval of the image:
-239.000 -1.872 (delta_t = 237.128 [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 -1.872 sec. to 244.396 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.71037 ( -0.201949 0.218268 )
Norm@50keV : 4.96206E-04 ( -8.46587e-05 8.62061e-05 )
------------------------------------------------------------
# Chi-Squared = 68.77 using 59 PHA bins.
# Reduced chi-squared = 1.207 for 57 degrees of freedom
# Null hypothesis probability = 1.365321e-01
Photon flux (15-150 keV) in 246.3 sec: 0.111511 ( -0.0105848 0.0105874 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3049e-06 ( -1.51157e-07 1.56663e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.872 sec. to 244.396 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.399635 ( -2.22384 1.33937 )
Epeak [keV] : 24.0542 ( -4.30953 3.13999 )
Norm@50keV : 6.34813E-02 ( -0.0967531 2.5285 )
------------------------------------------------------------
# Chi-Squared = 48.58 using 59 PHA bins.
# Reduced chi-squared = 0.8675 for 56 degrees of freedom
# Null hypothesis probability = 7.489160e-01
Photon flux (15-150 keV) in 246.3 sec: 0.105772 ( -0.0104278 0.010458 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10008e-06 ( -1.22534e-07 1.31495e-07 ) ergs/cm2
Band function
Time interval is from -1.872 sec. to 244.396 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.00021 ( -3.17295 -1.57699 )
beta : -10.00000 ( 1.38589e+07 1.38589e+07 )
Epeak [keV] : 24.9679 ( -5.39112 3.02148 )
Norm@50keV : 0.164205 ( -0.104114 2.25705 )
------------------------------------------------------------
# Chi-Squared = 48.57 using 59 PHA bins.
# Reduced chi-squared = 0.8831 for 55 degrees of freedom
# Null hypothesis probability = 7.172373e-01
Photon flux (15-150 keV) in 246.3 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 101.428 sec. to 102.428 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98362 ( -0.582348 0.711774 )
Norm@50keV : 3.09564E-03 ( -0.00140021 0.00131132 )
------------------------------------------------------------
# Chi-Squared = 61.91 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 57 degrees of freedom
# Null hypothesis probability = 3.051966e-01
Photon flux (15-150 keV) in 1 sec: 0.460883 ( -0.153534 0.153541 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.85241e-08 ( -1.14493e-08 1.22716e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 101.428 sec. to 102.428 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14831 ( )
Epeak [keV] : 40.4265 ( )
Norm@50keV : 9.84836E-03 ( )
------------------------------------------------------------
# Chi-Squared = 61.62 using 59 PHA bins.
# Reduced chi-squared = 1.100 for 56 degrees of freedom
# Null hypothesis probability = 2.818957e-01
Photon flux (15-150 keV) in 1 sec: 0.451496 ( -0.157626 0.155645 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.60011e-08 ( -1.18183e-08 1.35772e-08 ) ergs/cm2
Band function
Time interval is from 101.428 sec. to 102.428 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.260454 ( 1.1167 1.1167 )
beta : -2.72489 ( 2.35679 0.910651 )
Epeak [keV] : 34.8698 ( -35.934 -35.934 )
Norm@50keV : 8.40468E-02 ( -0.0561769 156.892 )
------------------------------------------------------------
# Chi-Squared = 61.35 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 55 degrees of freedom
# Null hypothesis probability = 2.588523e-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 29 11:53:06 EDT 2009