batgrbproduct Analysis for Trigger=572721
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): Wed Oct 2 17:56:45 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger572721/GCN5_download_cron
======================================================================
Trigger: 00572721 Segment: 000
BAT Trigger Time: 402389672.384 [s; MET]
Trigger Stop: 402389672.64 [s; MET]
UTC: 2013-10-02T06:54:21.282820 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 253.275042794748 Dec: 82.0571667841111 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.73
Image Trigger?: NO
Rate S/N Ratio: 15.7162336455017 [ if not an image trigger ]
Image S/N Ratio: 8.73
Flight Position: [ source = BAT ]
RA: 253.275042794748 Dec: 82.0571667841111 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 253.103253828913 Dec: 82.0356388237163 [deg; J2000]
{ 16h 52m 24.8s , +82d 02' 08.3" }
+/- 3.94343600804638 [arcmin] (estimated 90% radius based on SNR)
+/- 2.31976946790202 [arcmin] (formal 1-sigma fit error)
SNR: 4.2841894652854
Angular difference between Flight and Ground position is 1.924209 arcmin
Partial Coding Fraction: 0.71875 [ including projection effects ]
Duration
T90: 55.5919999480247 +/- 3.97822069659924
Measured from: 0.128000140190125
to: 55.7200000882149 [s; relative to TRIGTIME]
T50: 4.99999994039536 +/- 24.4502999561089
Measured from: 41.9640001058578
to: 46.9640000462532 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 43.1719999909401
to: 44.1719999909401 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.203999996185303
to: 59.6679999828339 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.316824 0.395851 0.307440 0.035560
0.039115 0.040810 0.036030 0.031932 [error]
Peak 0.036173 0.061016 0.050572 0.013560
0.005321 0.005790 0.005209 0.004098 [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 9.85e-08 1.67e-07 2.16e-07 5.64e-07 6.37e-07 1.05e-06 erg/cm2
Error 1.67e-08 1.87e-08 3.50e-08 1.86e-07 8.36e-08 2.19e-07 erg/cm2
Peak flux Power-law 3.55e-01 4.14e-01 3.47e-01 4.92e-01 1.29e+00 1.61e+00 ph/cm2/s
Error 6.82e-02 4.88e-02 4.21e-02 1.25e-01 1.36e-01 1.74e-01 ph/cm2/s
Fluence Cutoff-PL 9.22e-08 1.81e-07 2.32e-07 2.95e-07 6.38e-07 8.00e-07 erg/cm2
Error 2.13e-08 2.63e-08 4.28e-08 4.35e-07 1.02e-07 3.88e-07 erg/cm2
Peak flux Cutoff-PL 3.50e-01 4.17e-01 3.51e-01 4.43e-01 1.29e+00 1.56e+00 ph/cm2/s
Error 7.61e-02 5.38e-02 4.69e-02 2.04e-01 1.38e-01 2.42e-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 1.629 0.191 - - 1.14e-03 1.39e-04 54.830 57
CPL 0.740 0.845 65.5 60.8 3.43e-03 4.54e-03 50.820 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.253 0.177 - - 1.09e-02 1.12e-03 50.750 57
CPL 1.168 0.467 512.5 0.0 1.20e-02 0.00e+00 50.690 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: 45.504000 sec.
T50 in the 50-300 keV band: 12.288000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 59.872 -0.204 59.668
T90 55.592 0.128 55.720
T50 5.000 41.964 46.964
Peak 1.000 43.172 44.172
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
253.1033 +82.0356 0.0449 24.1 142.0 0.1428 4.3 TRIG_00572721
------------------------------------------
Foreground time interval of the image:
-0.204 8.417 (delta_t = 8.621 [sec])
Background time interval of the image:
-153.983 -0.204 (delta_t = 153.779 [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 -0.204 sec. to 59.668 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62904 ( -0.188113 0.193383 )
Norm@50keV : 1.14110E-03 ( -0.000139821 0.000137976 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.83 using 59 PHA bins.
# Reduced chi-squared = 0.9619 for 57 degrees of freedom
# Null hypothesis probability = 5.569095e-01
Photon flux (15-150 keV) in 59.87 sec: 0.147987 ( -0.0165105 0.0165169 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.36777e-07 ( -8.29086e-08 8.43652e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.204 sec. to 59.668 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.739976 ( -0.92081 0.768255 )
Epeak [keV] : 65.5014 ( -15.2924 106.324 )
Norm@50keV : 3.42962E-03 ( -0.0020726 0.00699765 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.82 using 59 PHA bins.
# Reduced chi-squared = 0.9076 for 56 degrees of freedom
# Null hypothesis probability = 6.705937e-01
Photon flux (15-150 keV) in 59.87 sec: 0.143147 ( -0.017003 0.017011 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.37633e-07 ( -1.00606e-07 1.03485e-07 ) ergs/cm2
Band function
Time interval is from -0.204 sec. to 59.668 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.739524 ( -0.565134 0.923411 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 65.4755 ( -14.5718 106.144 )
Norm@50keV : 3.43164E-03 ( -0.0020749 0.00699035 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.82 using 59 PHA bins.
# Reduced chi-squared = 0.9241 for 55 degrees of freedom
# Null hypothesis probability = 6.348596e-01
Photon flux (15-150 keV) in 59.87 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] : 13.4369 (-1.70281 1.94608)
R^2/D10^2 : 2.47631E-02 (-0.00952454 0.0154851)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.93 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 57 degrees of freedom
# Null hypothesis probability = 2.745091e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.671e-08 1.176e-08
25- 50 2.023e-07 3.392e-08
50-150 2.353e-07 5.667e-08
15-150 4.943e-07 7.008e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 147.149 (-57.0006 -145.488)
Norm : 0.616008 (-0.0742926 0.0930495)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.11 using 59 PHA bins.
# Reduced chi-squared = 0.9141 for 57 degrees of freedom
# Null hypothesis probability = 6.588263e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.488e-08 2.477e-08
25- 50 1.754e-07 5.921e-08
50-150 3.434e-07 2.036e-07
15-150 6.136e-07 3.222e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.24008 (-1.61958 2.26813)
R1^2/D10^2 : 0.379035 (-0.275218 1.00731)
kT2 [keV] : 18.3270 (-3.36666 5.57216)
R2^2/D10^2 : 6.77014E-03 (-0.00444718 0.0112151)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.56 using 59 PHA bins.
# Reduced chi-squared = 0.8830 for 55 degrees of freedom
# Null hypothesis probability = 7.173690e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.343e-08 4.782e-08
25- 50 1.756e-07 8.310e-08
50-150 3.135e-07 1.712e-07
15-150 5.825e-07 2.855e-07
Peak spectrum fit
Power-law model
Time interval is from 43.172 sec. to 44.172 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25342 ( -0.178278 0.17603 )
Norm@50keV : 1.09285E-02 ( -0.00112208 0.00112144 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.75 using 59 PHA bins.
# Reduced chi-squared = 0.8903 for 57 degrees of freedom
# Null hypothesis probability = 7.072706e-01
Photon flux (15-150 keV) in 1 sec: 1.29327 ( -0.135996 0.136171 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.09274e-07 ( -1.24749e-08 1.25619e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 43.172 sec. to 44.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16830 ( -0.68655 0.247675 )
Epeak [keV] : 512.463 ( -512.51 -512.51 )
Norm@50keV : 1.20374E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.69 using 59 PHA bins.
# Reduced chi-squared = 0.9052 for 56 degrees of freedom
# Null hypothesis probability = 6.753259e-01
Photon flux (15-150 keV) in 1 sec: 1.28951 ( -0.1384 0.13811 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08736e-07 ( -1.33451e-08 1.3003e-08 ) ergs/cm2
Band function
Time interval is from 43.172 sec. to 44.172 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.352159 ( 0.098539 4.75413 )
beta : -1.39639 ( -0.36938 0.242644 )
Epeak [keV] : 48.9874 ( -48.548 154.976 )
Norm@50keV : 0.114714 ( -0.130391 260.431 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.33 using 59 PHA bins.
# Reduced chi-squared = 0.8970 for 55 degrees of freedom
# Null hypothesis probability = 6.900185e-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] : 17.4397 (-2.5389 3.13204)
R^2/D10^2 : 9.14732E-02 (-0.0385214 0.0641208)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.98 using 59 PHA bins.
# Reduced chi-squared = 1.333 for 57 degrees of freedom
# Null hypothesis probability = 4.721723e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.625e-09 1.175e-09
25- 50 2.539e-08 3.855e-09
50-150 5.558e-08 1.007e-08
15-150 8.660e-08 1.224e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 5.34640 (-0.55651 0.556481)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.44 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.223758e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.332e-08 3.640e-09
25- 50 2.562e-08 1.210e-08
50-150 5.618e-08 3.051e-08
15-150 9.511e-08 3.433e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.79972 (-1.99594 2.39639)
R1^2/D10^2 : 0.630786 (-0.332914 0.799945)
kT2 [keV] : 41.4785 (-13.6063 59.0027)
R2^2/D10^2 : 4.51506E-03 (-0.00410861 0.0112502)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.36 using 59 PHA bins.
# Reduced chi-squared = 0.8611 for 55 degrees of freedom
# Null hypothesis probability = 7.582048e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.037e-08 4.767e-09
25- 50 2.600e-08 1.106e-08
50-150 7.407e-08 3.635e-08
15-150 1.104e-07 5.076e-08
Plot creation:
Wed Oct 2 18:25:01 EDT 2013