batgrbproduct Analysis for Trigger=362633
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 Sep 13 06:13:07 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger362633/GCN5_download_cron
======================================================================
Trigger: 00362633 Segment: 000
BAT Trigger Time: 274463434.944 [s; MET]
Trigger Stop: 274463435.968 [s; MET]
UTC: 2009-09-12T15:50:29.864660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 188.091869580758 Dec: 61.5125700544948 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.62
Image Trigger?: NO
Rate S/N Ratio: 10.4880884817015 [ if not an image trigger ]
Image S/N Ratio: 6.62
Flight Position: [ source = BAT ]
RA: 188.091869580758 Dec: 61.5125700544948 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 188.04636031838 Dec: 61.474846504157 [deg; J2000]
{ 12h 32m 11.1s , +61d 28' 29.4" }
+/- 1.22470261978823 [arcmin] (estimated 90% radius based on SNR)
+/- 0.406171291138878 [arcmin] (formal 1-sigma fit error)
SNR: 22.7698575191112
Angular difference between Flight and Ground position is 2.611761 arcmin
Partial Coding Fraction: 0.3046875 [ including projection effects ]
Duration
T90: 144 +/- 22.6274169979695
Measured from: 0.0560001134872437
to: 144.056000113487 [s; relative to TRIGTIME]
T50: 80 +/- 16
Measured from: 16.0560001134872
to: 96.0560001134872 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 87.555999994278
to: 88.555999994278 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.944000005722
to: 160.055999994278 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.167269 3.152300 2.105870 0.245879
0.129460 0.136356 0.121847 0.108373 [error]
Peak 0.478485 0.701272 0.564829 0.149155
0.041187 0.044243 0.039233 0.033391 [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 7.72e-07 1.28e-06 1.62e-06 4.09e-06 4.82e-06 7.77e-06 erg/cm2
Error 6.75e-08 6.93e-08 1.19e-07 6.32e-07 2.83e-07 7.30e-07 erg/cm2
Peak flux Power-law 3.19e-01 3.28e-01 2.38e-01 2.77e-01 9.92e-01 1.16e+00 ph/cm2/s
Error 3.88e-02 2.44e-02 2.02e-02 4.85e-02 6.95e-02 8.01e-02 ph/cm2/s
Fluence Cutoff-PL 6.85e-07 1.38e-06 1.66e-06 1.45e-06 5.18e-06 0.00e+00 erg/cm2
Error 8.13e-08 8.86e-08 1.32e-07 8.44e-07 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.00e-01 3.38e-01 2.45e-01 1.91e-01 9.78e-01 1.07e+00 ph/cm2/s
Error 4.62e-02 2.87e-02 2.26e-02 9.90e-02 7.23e-02 1.26e-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 1.663 0.094 - - 2.95e-03 1.63e-04 52.840 57
CPL 0.905 0.440 69.3 19.5 7.27e-03 4.03e-03 42.500 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.462 0.119 - - 8.03e-03 5.53e-04 72.850 57
CPL 1.140 0.449 134.5 -40.0 1.17e-02 6.58e-03 71.440 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: 100.480000 sec.
T50 in the 50-300 keV band: 79.936000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 176.000 -15.944 160.056
T90 144.000 0.056 144.056
T50 80.000 16.056 96.056
Peak 1.000 87.556 88.556
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
188.0464 +61.4748 0.0084 33.9 -105.0 8.4326 22.8 TRIG_00362633
------------------------------------------
Foreground time interval of the image:
-15.944 160.056 (delta_t = 176.000 [sec])
Background time interval of the image:
-239.944 -15.944 (delta_t = 224.000 [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 -15.944 sec. to 160.056 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66275 ( -0.0931195 0.0941393 )
Norm@50keV : 2.94774E-03 ( -0.00016329 0.000162152 )
------------------------------------------------------------
# Chi-Squared = 52.84 using 59 PHA bins.
# Reduced chi-squared = 0.9271 for 57 degrees of freedom
# Null hypothesis probability = 6.316724e-01
Photon flux (15-150 keV) in 176 sec: 0.386537 ( -0.0208474 0.0208776 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.81906e-06 ( -2.81674e-07 2.83378e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.944 sec. to 160.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.905328 ( -0.463713 0.417198 )
Epeak [keV] : 69.2797 ( -10.9326 28.0714 )
Norm@50keV : 7.26653E-03 ( -0.00279959 0.00526097 )
------------------------------------------------------------
# Chi-Squared = 42.50 using 59 PHA bins.
# Reduced chi-squared = 0.7590 for 56 degrees of freedom
# Null hypothesis probability = 9.083876e-01
Photon flux (15-150 keV) in 176 sec: 0.371384 ( -0.022324 0.022323 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -15.944 sec. to 160.056 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.596592 ( -0.653441 1.16788 )
beta : -2.13257 ( 2.13257 0.312324 )
Epeak [keV] : 57.7908 ( -17.4599 31.2634 )
Norm@50keV : 1.11882E-02 ( -0.0111882 0.0583963 )
------------------------------------------------------------
# Chi-Squared = 41.62 using 59 PHA bins.
# Reduced chi-squared = 0.7568 for 55 degrees of freedom
# Null hypothesis probability = 9.084777e-01
Photon flux (15-150 keV) in 176 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 80.056 sec. to 96.056 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46232 ( -0.118437 0.11864 )
Norm@50keV : 8.02822E-03 ( -0.000553273 0.000551986 )
------------------------------------------------------------
# Chi-Squared = 72.85 using 59 PHA bins.
# Reduced chi-squared = 1.278 for 57 degrees of freedom
# Null hypothesis probability = 7.679930e-02
Photon flux (15-150 keV) in 16 sec: 0.992429 ( -0.0694575 0.0695575 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22644e-06 ( -9.23189e-08 9.28347e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 80.056 sec. to 96.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13971 ( -0.512227 0.385142 )
Epeak [keV] : 134.498 ( -54.4444 -134.499 )
Norm@50keV : 1.16703E-02 ( -0.00399576 0.00915804 )
------------------------------------------------------------
# Chi-Squared = 71.44 using 59 PHA bins.
# Reduced chi-squared = 1.276 for 56 degrees of freedom
# Null hypothesis probability = 8.007127e-02
Photon flux (15-150 keV) in 16 sec: 0.978390 ( -0.072313 0.07229 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19786e-06 ( -1.02499e-07 1.01822e-07 ) ergs/cm2
Band function
Time interval is from 80.056 sec. to 96.056 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.486663 ( 0.723315 0.723315 )
beta : -1.62537 ( 1.62783 0.225425 )
Epeak [keV] : 58.6401 ( -58.6591 332.122 )
Norm@50keV : 3.04554E-02 ( -0.0304294 286.294 )
------------------------------------------------------------
# Chi-Squared = 70.50 using 59 PHA bins.
# Reduced chi-squared = 1.282 for 55 degrees of freedom
# Null hypothesis probability = 7.771902e-02
Photon flux (15-150 keV) in 16 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sun Sep 13 06:36:46 EDT 2009