batgrbproduct Analysis for Trigger=535747
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): Fri Oct 12 00:30:12 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger535747/GCN5_download_cron
======================================================================
Trigger: 00535747 Segment: 000
BAT Trigger Time: 371616871.036 [s; MET]
Trigger Stop: 371616871.1 [s; MET]
UTC: 2012-10-11T02:54:21.290040 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 272.130169213924 Dec: -20.409982700456 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.73
Image Trigger?: NO
Rate S/N Ratio: 10.3923048454133 [ if not an image trigger ]
Image S/N Ratio: 6.73
Flight Position: [ source = BAT ]
RA: 272.130169213924 Dec: -20.409982700456 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 272.171500079999 Dec: -20.4478731713649 [deg; J2000]
{ 18h 08m 41.2s , -20d 26' 52.3" }
+/- 2.38160684235883 [arcmin] (estimated 90% radius based on SNR)
+/- 1.15988990836728 [arcmin] (formal 1-sigma fit error)
SNR: 8.80506500558838
Angular difference between Flight and Ground position is 3.250986 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 0.671999990940094 +/- 0.161046585190824
Measured from: -0.0159999132156372
to: 0.656000077724457 [s; relative to TRIGTIME]
T50: 0.403999984264374 +/- 0.172754161861871
Measured from: 0.0400000810623169
to: 0.444000065326691 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.184000015258789
to: 0.815999984741211 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0519999861717224
to: 0.684000015258789 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.035141 0.028740 0.012819 -0.003403
0.006077 0.005450 0.004271 0.003686 [error]
Peak 0.033508 0.031967 0.007313 -0.005115
0.006972 0.006166 0.004934 0.004298 [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 9.98e-09 1.08e-08 8.28e-09 1.04e-08 3.29e-08 3.94e-08 erg/cm2
Error 2.52e-09 2.43e-09 3.52e-09 8.43e-09 8.37e-09 1.34e-08 erg/cm2
Peak flux Power-law 3.12e-01 1.90e-01 7.41e-02 3.87e-02 5.96e-01 6.15e-01 ph/cm2/s
Error 9.17e-02 4.84e-02 3.36e-02 3.19e-02 1.43e-01 1.49e-01 ph/cm2/s
Fluence Cutoff-PL 9.38e-09 1.24e-08 7.35e-09 1.78e-09 3.09e-08 0.00e+00 erg/cm2
Error 2.78e-09 3.25e-09 4.28e-09 8.01e-09 1.31e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.68e-01 2.49e-01 5.67e-02 1.83e-03 5.76e-01 5.76e-01 ph/cm2/s
Error 1.07e-01 7.02e-02 4.17e-02 1.17e-02 1.41e-01 1.40e-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 5.82e-01 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 2.381 0.420 - - 4.61e-03 1.45e-03 69.810 57
CPL 1.213 1.520 25.8 0.0 2.39e-02 0.00e+00 68.060 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.357 0.455 - - 3.30e-03 1.16e-03 73.440 57
CPL -0.094 2.976 31.5 0.0 1.10e-01 0.00e+00 68.860 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 0.736 -0.052 0.684
T90 0.672 -0.016 0.656
T50 0.404 0.040 0.444
Peak 1.000 -0.184 0.816
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
272.1715 -20.4479 0.0218 10.8 38.2 0.0848 8.8 TRIG_00535747
------------------------------------------
Foreground time interval of the image:
-0.052 0.684 (delta_t = 0.736 [sec])
Background time interval of the image:
-239.036 -0.052 (delta_t = 238.984 [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 -0.052 sec. to 0.684 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.38082 ( -0.38609 0.453828 )
Norm@50keV : 4.60883E-03 ( -0.00146683 0.00143961 )
------------------------------------------------------------
# Chi-Squared = 69.81 using 59 PHA bins.
# Reduced chi-squared = 1.225 for 57 degrees of freedom
# Null hypothesis probability = 1.187434e-01
Photon flux (15-150 keV) in 0.736 sec: 0.843271 ( -0.172188 0.172198 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.29476e-08 ( -8.14406e-09 8.60413e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.052 sec. to 0.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21291 ( -2.25034 0.789102 )
Epeak [keV] : 25.7694 ( )
Norm@50keV : 2.38676E-02 ( )
------------------------------------------------------------
# Chi-Squared = 68.06 using 59 PHA bins.
# Reduced chi-squared = 1.215 for 56 degrees of freedom
# Null hypothesis probability = 1.294594e-01
Photon flux (15-150 keV) in 0.736 sec: 0.823877 ( -0.169391 0.172489 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.08688e-08 ( -9.1487e-09 1.70359e-08 ) ergs/cm2
Band function
Time interval is from -0.052 sec. to 0.684 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21160 ( 1.2265 5.11697 )
beta : -10.00000 ( 1.45582e+08 1.45582e+08 )
Epeak [keV] : 25.7723 ( -24.2831 17.0398 )
Norm@50keV : 2.39128E-02 ( -0.0238594 0.647868 )
------------------------------------------------------------
# Chi-Squared = 68.06 using 59 PHA bins.
# Reduced chi-squared = 1.238 for 55 degrees of freedom
# Null hypothesis probability = 1.110224e-01
Photon flux (15-150 keV) in 0.736 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] : 8.08676 (-1.84066 2.31201)
R^2/D10^2 : 0.893760 (-0.567942 1.66408)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 71.94 using 59 PHA bins.
# Reduced chi-squared = 1.262 for 57 degrees of freedom
# Null hypothesis probability = 8.779913e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.841e-09 3.010e-09
25- 50 1.398e-08 5.966e-09
50-150 3.803e-09 2.282e-09
15-150 2.562e-08 8.508e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 38.3227 (-14.7072 28.4454)
Norm : 5.68523 (-1.81828 3.01023)
------------------------------------------------------------
# Chi-Squared = 68.09 using 59 PHA bins.
# Reduced chi-squared = 1.195 for 57 degrees of freedom
# Null hypothesis probability = 1.492635e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.466e-09 2.542e-09
25- 50 1.222e-08 3.957e-09
50-150 9.016e-09 5.174e-09
15-150 3.070e-08 1.042e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.29199 (-4.29181 20.712)
R1^2/D10^2 : 7.59051 (-6.61591 -7.58686)
kT2 [keV] : 12.8617 (-12.8637 12.1774)
R2^2/D10^2 : 9.94449E-02 (-0.0901472 0.70612)
------------------------------------------------------------
# Chi-Squared = 67.57 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 55 degrees of freedom
# Null hypothesis probability = 1.188894e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.644e-09 5.572e-09
25- 50 1.185e-08 6.138e-09
50-150 9.143e-09 6.020e-09
15-150 3.064e-08 1.577e-08
Peak spectrum fit
Power-law model
Time interval is from -0.184 sec. to 0.816 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.35730 ( -0.417996 0.491003 )
Norm@50keV : 3.30245E-03 ( -0.00116307 0.00116266 )
------------------------------------------------------------
# Chi-Squared = 73.44 using 59 PHA bins.
# Reduced chi-squared = 1.288 for 57 degrees of freedom
# Null hypothesis probability = 7.026610e-02
Photon flux (15-150 keV) in 1 sec: 0.596095 ( -0.143138 0.143172 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.18955e-08 ( -9.03346e-09 9.63069e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.184 sec. to 0.816 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.40361E-02 ( -3.90874 2.04392 )
Epeak [keV] : 31.4793 ( )
Norm@50keV : 0.110390 ( )
------------------------------------------------------------
# Chi-Squared = 68.86 using 59 PHA bins.
# Reduced chi-squared = 1.230 for 56 degrees of freedom
# Null hypothesis probability = 1.160068e-01
Photon flux (15-150 keV) in 1 sec: 0.575523 ( -0.140264 0.141253 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.81481e-08 ( -7.4756e-09 9.325e-09 ) ergs/cm2
Band function
Time interval is from -0.184 sec. to 0.816 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.133832 ( -1.43205 0.237545 )
beta : -9.99999 ( 512210 512220 )
Epeak [keV] : 31.5339 ( -25.9513 10.4903 )
Norm@50keV : 0.116954 ( -0.153232 37.1515 )
------------------------------------------------------------
# Chi-Squared = 68.86 using 59 PHA bins.
# Reduced chi-squared = 1.252 for 55 degrees of freedom
# Null hypothesis probability = 9.902954e-02
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] : 8.41005 (-1.7738 2.16709)
R^2/D10^2 : 0.575828 (-0.34945 0.918719)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 69.32 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.268681e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.624e-09 3.582e-09
25- 50 1.453e-08 7.084e-09
50-150 4.484e-09 2.810e-09
15-150 2.663e-08 1.193e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 37.3582 (-14.5268 29.4246)
Norm : 4.17909 (-1.44392 2.3471)
------------------------------------------------------------
# Chi-Squared = 70.18 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 57 degrees of freedom
# Null hypothesis probability = 1.127806e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.367e-09 3.445e-09
25- 50 1.195e-08 5.339e-09
50-150 8.567e-09 5.709e-09
15-150 2.989e-08 1.281e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.00617 (-4.00092 -4.00092)
R1^2/D10^2 : 3.57013 (-3.59056 -3.59056)
kT2 [keV] : 9.71185 (-9.70323 -9.70323)
R2^2/D10^2 : 0.274487 (-0.275868 1.04427)
------------------------------------------------------------
# Chi-Squared = 68.69 using 59 PHA bins.
# Reduced chi-squared = 1.249 for 55 degrees of freedom
# Null hypothesis probability = 1.016000e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.488e-09 4.441e-09
25- 50 1.362e-08 7.670e-09
50-150 5.976e-09 3.633e-09
15-150 2.809e-08 1.564e-08
Plot creation:
Fri Oct 12 00:51:46 EDT 2012