batgrbproduct Analysis for Trigger=562625
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): Sun Jul 21 19:16:57 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger562625/batgroup_hand_proc
======================================================================
Trigger: 00562625 Segment: 000
BAT Trigger Time: 395905680 [s; MET]
Trigger Stop: 395905760 [s; MET]
UTC: 2013-07-19T05:47:49.192320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 89.0393291132065 Dec: -11.5845014417971 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.3
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.3
Flight Position: [ source = BAT ]
RA: 89.0393291132065 Dec: -11.5845014417971 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 89.038391729042 Dec: -11.5913753972969 [deg; J2000]
{ 05h 56m 09.2s , -11d 35' 29.0" }
+/- 1.90715699829733 [arcmin] (estimated 90% radius based on SNR)
+/- 0.659587700100035 [arcmin] (formal 1-sigma fit error)
SNR: 12.0938983613317
Angular difference between Flight and Ground position is 0.416101 arcmin
Partial Coding Fraction: 0.5078125 [ including projection effects ]
Duration
T90: 177.74799990654 +/- 20.4788269817604
Measured from: 12.9480000138283
to: 190.695999920368 [s; relative to TRIGTIME]
T50: 72.9559999704361 +/- 23.7088382456249
Measured from: 43.5
to: 116.455999970436 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 82.6800000071526
to: 83.6800000071526 [s; relative to TRIGTIME]
Total Fluence
Measured from: 6.22000002861023
to: 205.180000007153 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.131953 1.167111 1.043243 0.192779
0.113730 0.110627 0.097154 0.088038 [error]
Peak 0.018929 0.027314 0.022796 0.009301
0.008124 0.007706 0.006975 0.006198 [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 3.54e-07 6.00e-07 7.74e-07 2.02e-06 2.28e-06 3.74e-06 erg/cm2
Error 5.74e-08 5.83e-08 9.90e-08 5.59e-07 2.35e-07 6.33e-07 erg/cm2
Peak flux Power-law 1.79e-01 1.97e-01 1.55e-01 2.00e-01 6.05e-01 7.31e-01 ph/cm2/s
Error 1.02e-01 7.19e-02 5.46e-02 1.45e-01 2.01e-01 2.31e-01 ph/cm2/s
Fluence Cutoff-PL 3.55e-07 6.01e-07 7.73e-07 1.99e-06 2.28e-06 3.72e-06 erg/cm2
Error 3.10e-08 6.24e-08 1.01e-07 8.93e-07 2.41e-07 9.30e-07 erg/cm2
Peak flux Cutoff-PL 1.15e-01 2.25e-01 1.79e-01 4.46e-02 5.56e-01 5.64e-01 ph/cm2/s
Error 1.23e-01 9.05e-02 7.11e-02 8.53e-02 2.07e-01 2.52e-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 1.632 0.172 - - 1.23e-03 1.18e-04 79.000 57
CPL 1.634 0.187 9999.4 0.0 1.23e-03 0.00e+00 79.000 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.350 0.520 - - 5.02e-03 1.58e-03 67.700 57
CPL -0.691 3.639 68.3 -26.4 4.82e-02 5.03e+00 65.840 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: 196.160000 sec.
T50 in the 50-300 keV band: 94.912000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 198.960 6.220 205.180
T90 177.748 12.948 190.696
T50 72.956 43.500 116.456
Peak 1.000 82.680 83.680
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
89.0384 -11.5914 0.0160 39.8267 -145.3394 3.4665311 12.094 TRIG_00562625
Foreground time interval of the image:
6.220 205.180 (delta_t = 198.960 [sec])
Background time interval of the image:
-239.000 6.220 (delta_t = 245.220 [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 6.220 sec. to 205.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63156 ( -0.170311 0.172726 )
Norm@50keV : 1.23020E-03 ( -0.000118865 0.000117943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.00 using 59 PHA bins.
# Reduced chi-squared = 1.386 for 57 degrees of freedom
# Null hypothesis probability = 2.850305e-02
Photon flux (15-150 keV) in 199 sec: 0.159671 ( -0.0154027 0.0154612 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.2812e-06 ( -2.3372e-07 2.35503e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.220 sec. to 205.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63361 ( -0.202137 0.171393 )
Epeak [keV] : 9999.36 ( )
Norm@50keV : 1.23109E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.00 using 59 PHA bins.
# Reduced chi-squared = 1.411 for 56 degrees of freedom
# Null hypothesis probability = 2.314747e-02
Photon flux (15-150 keV) in 199 sec: 0.159685 ( -0.015867 0.015363 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.27875e-06 ( -2.45685e-07 2.35934e-07 ) ergs/cm2
Band function
Time interval is from 6.220 sec. to 205.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.83116 ( -0.615488 -0.615488 )
beta : -1.63721 ( -0.180854 0.1733 )
Epeak [keV] : 17.9681 ( -20.5324 162.357 )
Norm@50keV : 111.767 ( -111.737 188185 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.94 using 59 PHA bins.
# Reduced chi-squared = 1.435 for 55 degrees of freedom
# Null hypothesis probability = 1.886014e-02
Photon flux (15-150 keV) in 199 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] : 14.6724 (-1.5939 1.82865)
R^2/D10^2 : 1.86476E-02 (-0.00645113 0.0096203)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 108.43 using 59 PHA bins.
# Reduced chi-squared = 1.9022 for 57 degrees of freedom
# Null hypothesis probability = 4.759165e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.678e-07 3.033e-08
25- 50 6.532e-07 8.875e-08
50-150 9.475e-07 1.908e-07
15-150 1.768e-06 2.090e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 174.724 (-64.3231 -174.185)
Norm : 0.646183 (-0.0652304 0.0461575)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.07 using 59 PHA bins.
# Reduced chi-squared = 1.405 for 57 degrees of freedom
# Null hypothesis probability = 2.362939e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.254e-07 1.086e-07
25- 50 6.158e-07 2.962e-07
50-150 1.290e-06 6.954e-07
15-150 2.231e-06 1.025e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.75781 (-0.913853 1.37789)
R1^2/D10^2 : 2.15407 (-1.64793 7.39448)
kT2 [keV] : 18.7180 (-2.66389 3.83814)
R2^2/D10^2 : 7.00367E-03 (-0.00349697 0.00470389)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.18 using 59 PHA bins.
# Reduced chi-squared = 1.440 for 55 degrees of freedom
# Null hypothesis probability = 1.802963e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.822e-07 1.728e-07
25- 50 5.452e-07 1.428e-07
50-150 1.179e-06 2.665e-07
15-150 2.107e-06 4.209e-07
Peak spectrum fit
Power-law model
Time interval is from 82.680 sec. to 83.680 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35002 ( -0.532116 0.508626 )
Norm@50keV : 5.02382E-03 ( -0.00157989 0.00157949 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.70 using 59 PHA bins.
# Reduced chi-squared = 1.188 for 57 degrees of freedom
# Null hypothesis probability = 1.569781e-01
Photon flux (15-150 keV) in 1 sec: 0.605254 ( -0.199083 0.202224 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.90642e-08 ( -1.61338e-08 1.63888e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 82.680 sec. to 83.680 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.690691 ( -5.03566 2.2421 )
Epeak [keV] : 68.2919 ( -15.5707 -68.2832 )
Norm@50keV : 4.81656E-02 ( -0.0482095 10.004 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.84 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 56 degrees of freedom
# Null hypothesis probability = 1.728903e-01
Photon flux (15-150 keV) in 1 sec: 0.556366 ( -0.203051 0.211582 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.3648e-08 ( -1.62484e-08 1.79006e-08 ) ergs/cm2
Band function
Time interval is from 82.680 sec. to 83.680 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.08899 ( -0.795017 -0.795017 )
beta : -2.12556 ( 3.04439 5.00422 )
Epeak [keV] : 52.6741 ( -66.3544 170.274 )
Norm@50keV : 0.328676 ( -0.331091 8.18288 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.74 using 59 PHA bins.
# Reduced chi-squared = 1.195 for 55 degrees of freedom
# Null hypothesis probability = 1.522379e-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] : 16.4520 (-4.46994 7.00079)
R^2/D10^2 : 5.48694E-02 (-0.0548692 0.112826)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.01 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 57 degrees of freedom
# Null hypothesis probability = 1.935594e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.051e-09 1.909e-09
25- 50 1.314e-08 7.710e-09
50-150 2.512e-08 1.630e-08
15-150 4.131e-08 2.676e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-121.918 -199.363)
Norm : 2.56801 (-0.805841 0.805998)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.60 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 57 degrees of freedom
# Null hypothesis probability = 1.589940e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.395e-09 4.116e-09
25- 50 1.230e-08 7.455e-09
50-150 2.698e-08 1.655e-08
15-150 4.567e-08 2.826e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.123 ( )
R1^2/D10^2 : 2.68189E-05 (-2.68189e-05 0.160168)
kT2 [keV] : 14.9774 (-13.8161 8.09791)
R2^2/D10^2 : 7.05756E-02 (-0.0351362 0.135754)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.81 using 59 PHA bins.
#Fit statistic : Chi-Squared = 65.80 using 59 PHA bins.
# Reduced chi-squared = 1.197 for 55 degrees of freedom
# Reduced chi-squared = 1.196 for 55 degrees of freedom
# Null hypothesis probability = 1.508315e-01
# Null hypothesis probability = 1.510773e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.674e-09 6.090e-09
25- 50 1.326e-08 2.027e-08
50-150 2.691e-08 6.700e-08
15-150 4.385e-08 9.965e-08
Plot creation:
Sun Jul 21 19:38:41 EDT 2013