batgrbproduct Analysis for Trigger=536172
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 batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Thu Oct 18 15:24:39 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger536172/GCN5_download_cron
======================================================================
Trigger: 00536172 Segment: 000
BAT Trigger Time: 372194617.856 [s; MET]
Trigger Stop: 372194618.368 [s; MET]
UTC: 2012-10-17T19:23:28.085580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 288.815930530699 Dec: -1.59559934208673 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.89
Image Trigger?: NO
Rate S/N Ratio: 12.8840987267251 [ if not an image trigger ]
Image S/N Ratio: 7.89
Flight Position: [ source = BAT ]
RA: 288.815930530699 Dec: -1.59559934208673 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 288.820211125771 Dec: -1.59153188857564 [deg; J2000]
{ 19h 15m 16.9s , -01d 35' 29.5" }
+/- 1.6591347325197 [arcmin] (estimated 90% radius based on SNR)
+/- 0.617457155301617 [arcmin] (formal 1-sigma fit error)
SNR: 14.7571241172696
Angular difference between Flight and Ground position is 0.354221 arcmin
Partial Coding Fraction: 0.3515625 [ including projection effects ]
Duration
T90: 5 +/- 1.4142135623731
Measured from: -2.85599988698959
to: 2.14400011301041 [s; relative to TRIGTIME]
T50: 2 +/- 1
Measured from: -0.855999886989594
to: 1.14400011301041 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.14399999380112
to: 2.14399999380112 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.85600000619888
to: 2.14399999380112 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.295719 0.405490 0.254281 -0.010774
0.032474 0.034981 0.030236 0.032408 [error]
Peak 0.082345 0.135019 0.041577 0.005160
0.015159 0.016116 0.014131 0.014514 [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 1.07e-07 1.70e-07 2.04e-07 4.80e-07 6.19e-07 9.61e-07 erg/cm2
Error 1.63e-08 1.69e-08 3.05e-08 1.47e-07 7.16e-08 1.75e-07 erg/cm2
Peak flux Power-law 9.96e-01 8.60e-01 5.08e-01 4.50e-01 2.56e+00 2.81e+00 ph/cm2/s
Error 2.38e-01 1.36e-01 1.19e-01 2.06e-01 4.05e-01 4.51e-01 ph/cm2/s
Fluence Cutoff-PL 9.96e-08 1.82e-07 2.06e-07 1.95e-07 6.82e-07 0.00e+00 erg/cm2
Error 1.88e-08 2.30e-08 3.33e-08 2.84e-07 2.67e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 9.58e-01 9.09e-01 5.07e-01 2.39e-01 2.52e+00 2.61e+00 ph/cm2/s
Error 2.60e-01 1.94e-01 1.41e-01 3.31e-01 4.09e-01 5.56e-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 3.27e+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 1.734 0.177 - - 1.34e-02 1.48e-03 34.040 57
CPL 1.155 0.786 66.2 -24.7 2.77e-02 0.00e+00 32.270 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.760 0.281 - - 1.88e-02 3.40e-03 61.280 57
CPL 1.319 1.394 65.4 0.0 3.39e-02 0.00e+00 60.880 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: 5.632000 sec.
T50 in the 50-300 keV band: 1.856000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 5.000 -2.856 2.144
T90 5.000 -2.856 2.144
T50 2.000 -0.856 1.144
Peak 1.000 1.144 2.144
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
288.8202 -1.5915 0.0130 36.0 37.1 1.1049 14.8 TRIG_00536172
------------------------------------------
Foreground time interval of the image:
-2.856 2.144 (delta_t = 5.000 [sec])
Background time interval of the image:
-187.755 -2.856 (delta_t = 184.899 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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 -2.856 sec. to 2.144 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73441 ( -0.174664 0.180123 )
Norm@50keV : 1.34099E-02 ( -0.00149002 0.00146743 )
------------------------------------------------------------
# Chi-Squared = 34.04 using 59 PHA bins.
# Reduced chi-squared = 0.5973 for 57 degrees of freedom
# Null hypothesis probability = 9.932289e-01
Photon flux (15-150 keV) in 5 sec: 1.80293 ( -0.179722 0.179856 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.19275e-07 ( -7.10695e-08 7.20925e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.856 sec. to 2.144 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15527 ( -0.89102 0.680272 )
Epeak [keV] : 66.2027 ( -16.7374 -66.2029 )
Norm@50keV : 2.77325E-02 ( )
------------------------------------------------------------
# Chi-Squared = 32.27 using 59 PHA bins.
# Reduced chi-squared = 0.5762 for 56 degrees of freedom
# Null hypothesis probability = 9.954219e-01
Photon flux (15-150 keV) in 5 sec: 1.75963 ( -0.18824 0.18777 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.8208e-07 ( -1.52835e-07 3.81205e-07 ) ergs/cm2
Band function
Time interval is from -2.856 sec. to 2.144 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.713225 ( 0.614945 0.614945 )
beta : -2.09332 ( 2.09297 0.444578 )
Epeak [keV] : 50.4119 ( -49.3018 393.007 )
Norm@50keV : 5.26497E-02 ( -0.0513103 2620.57 )
------------------------------------------------------------
# Chi-Squared = 31.97 using 59 PHA bins.
# Reduced chi-squared = 0.5813 for 55 degrees of freedom
# Null hypothesis probability = 9.945090e-01
Photon flux (15-150 keV) in 5 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.0038 (-1.28498 1.47849)
R^2/D10^2 : 0.441525 (-0.154994 0.23045)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 48.58 using 59 PHA bins.
# Reduced chi-squared = 0.8523 for 57 degrees of freedom
# Null hypothesis probability = 7.786479e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.728e-08 1.195e-08
25- 50 2.118e-07 2.548e-08
50-150 1.836e-07 4.157e-08
15-150 4.627e-07 5.857e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 113.578 (-22.8112 87.4993)
Norm : 7.77639 (-0.959808 1.1617)
------------------------------------------------------------
# Chi-Squared = 32.33 using 59 PHA bins.
# Reduced chi-squared = 0.5673 for 57 degrees of freedom
# Null hypothesis probability = 9.965386e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.015e-07 1.392e-08
25- 50 1.798e-07 2.028e-08
50-150 3.120e-07 5.255e-08
15-150 5.932e-07 7.000e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.65721 (-3.57049 2.47237)
R1^2/D10^2 : 1.56990 (-0.873131 11.0901)
kT2 [keV] : 24.9134 (-10.008 39.4982)
R2^2/D10^2 : 1.97863E-02 (-0.0182398 0.144564)
------------------------------------------------------------
# Chi-Squared = 33.46 using 59 PHA bins.
# Reduced chi-squared = 0.6083 for 55 degrees of freedom
# Null hypothesis probability = 9.903902e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.109e-08 3.943e-08
25- 50 1.908e-07 8.198e-08
50-150 3.082e-07 1.673e-07
15-150 5.900e-07 2.601e-07
Peak spectrum fit
Power-law model
Time interval is from 1.144 sec. to 2.144 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75966 ( -0.274113 0.287137 )
Norm@50keV : 1.88489E-02 ( -0.0034396 0.00335224 )
------------------------------------------------------------
# Chi-Squared = 61.28 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 57 degrees of freedom
# Null hypothesis probability = 3.252138e-01
Photon flux (15-150 keV) in 1 sec: 2.55782 ( -0.404878 0.405075 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.73834e-07 ( -3.211e-08 3.29253e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.144 sec. to 2.144 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31948 ( -1.87515 0.912238 )
Epeak [keV] : 65.3588 ( )
Norm@50keV : 3.38634E-02 ( )
------------------------------------------------------------
# Chi-Squared = 60.88 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 56 degrees of freedom
# Null hypothesis probability = 3.045951e-01
Photon flux (15-150 keV) in 1 sec: 2.51910 ( -0.42165 0.396 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95551e-07 ( -7.0515e-08 1.47756e-07 ) ergs/cm2
Band function
Time interval is from 1.144 sec. to 2.144 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.46168 ( -2.9491 -2.9491 )
beta : -2.02259 ( 2.02285 0.420383 )
Epeak [keV] : 28.0170 ( -28.061 82.9994 )
Norm@50keV : 109.004 ( -100.418 608.287 )
------------------------------------------------------------
# Chi-Squared = 59.07 using 59 PHA bins.
# Reduced chi-squared = 1.074 for 55 degrees of freedom
# Null hypothesis probability = 3.291871e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.2790 (-1.60443 2.00978)
R^2/D10^2 : 1.11610 (-0.550654 0.998982)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 65.64 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 57 degrees of freedom
# Null hypothesis probability = 2.023597e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.423e-08 6.910e-09
25- 50 6.260e-08 1.476e-08
50-150 3.536e-08 1.464e-08
15-150 1.222e-07 2.839e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 100.666 (-42.8694 -100.016)
Norm : 11.3580 (-2.25 3.05939)
------------------------------------------------------------
# Chi-Squared = 60.82 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 57 degrees of freedom
# Null hypothesis probability = 3.399557e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.969e-08 6.035e-09
25- 50 5.140e-08 9.090e-09
50-150 8.361e-08 1.992e-08
15-150 1.647e-07 2.855e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.45776 (-1.82715 1.97137)
R1^2/D10^2 : 2.01634 (-1.06502 2.63764)
kT2 [keV] : 57.6719 (-34.3869 -56.6711)
R2^2/D10^2 : 2.24512E-03 (-0.00221368 0.0351341)
------------------------------------------------------------
# Chi-Squared = 56.47 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 55 degrees of freedom
# Null hypothesis probability = 4.197269e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.783e-08 1.304e-08
25- 50 5.754e-08 2.870e-08
50-150 9.176e-08 4.829e-08
15-150 1.771e-07 7.425e-08
Plot creation:
Thu Oct 18 15:44:36 EDT 2012