batgrbproduct Analysis for Trigger=632180
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): Mon Feb 23 17:52:11 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger632180/GCN5_download_cron
======================================================================
Trigger: 00632180 Segment: 000
BAT Trigger Time: 446317014.08 [s; MET]
Trigger Stop: 446317015.104 [s; MET]
UTC: 2015-02-22T16:56:40.858780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 198.773581295466 Dec: -12.1368389920425 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.76
Image Trigger?: NO
Rate S/N Ratio: 12.6095202129185 [ if not an image trigger ]
Image S/N Ratio: 9.76
Flight Position: [ source = BAT ]
RA: 198.773581295466 Dec: -12.1368389920425 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 198.78721851388 Dec: -12.1496508065412 [deg; J2000]
{ 13h 15m 08.9s , -12d 08' 58.7" }
+/- 0.776486331509738 [arcmin] (estimated 90% radius based on SNR)
+/- 0.255746569453942 [arcmin] (formal 1-sigma fit error)
SNR: 43.6586268825899
Angular difference between Flight and Ground position is 1.109411 arcmin
Partial Coding Fraction: 0.4804688 [ including projection effects ]
Duration
T90: 15.7919999361038 +/- 7.39658436699667
Measured from: 0.976000130176544
to: 16.7680000662804 [s; relative to TRIGTIME]
T50: 3.92399996519089 +/- 0.452636729937805
Measured from: 4.9400001168251
to: 8.86400008201599 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.36800003051758
to: 6.36800003051758 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0640000104904175
to: 28.1119999885559 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.971751 1.311051 0.926663 0.202971
0.043744 0.045505 0.040320 0.032990 [error]
Peak 0.123841 0.219815 0.173277 0.037880
0.010570 0.011937 0.010755 0.008254 [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 3.30e-07 5.67e-07 7.43e-07 1.97e-06 2.18e-06 3.61e-06 erg/cm2
Error 2.44e-08 2.49e-08 4.09e-08 2.37e-07 9.79e-08 2.66e-07 erg/cm2
Peak flux Power-law 1.45e+00 1.54e+00 1.17e+00 1.43e+00 4.70e+00 5.59e+00 ph/cm2/s
Error 1.61e-01 1.06e-01 8.89e-02 2.23e-01 3.02e-01 3.57e-01 ph/cm2/s
Fluence Cutoff-PL 3.10e-07 5.84e-07 7.59e-07 1.23e-06 2.12e-06 2.88e-06 erg/cm2
Error 2.96e-08 2.91e-08 4.43e-08 -------- 1.09e-07 5.10e-07 erg/cm2
Peak flux Cutoff-PL 1.29e+00 1.62e+00 1.23e+00 7.86e-01 4.59e+00 4.93e+00 ph/cm2/s
Error 1.94e-01 1.25e-01 1.04e-01 3.43e-01 3.12e-01 4.63e-01 ph/cm2/s
Fluence Band 3.03e-07 5.90e-07 7.38e-07 1.71e-06 2.13e-06 3.35e-06 erg/cm2
Error 3.17e-08 3.41e-08 -------- -------- -------- -------- erg/cm2
Peak flux Band 1.31e+00 1.61e+00 1.23e+00 8.69e-01 4.61e+00 5.02e+00 ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.611 0.075 - - 8.31e-03 3.51e-04 60.080 57
CPL 1.277 0.298 110.2 160.6 1.22e-02 4.12e-03 56.080 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.404 0.106 - - 3.85e-02 2.43e-03 78.170 57
CPL 0.810 0.453 104.1 76.2 7.54e-02 4.01e-02 72.410 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: 10.112000 sec.
T50 in the 50-300 keV band: 3.008000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 28.048 0.064 28.112
T90 15.792 0.976 16.768
T50 3.924 4.940 8.864
Peak 1.000 5.368 6.368
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
198.7872 -12.1497 0.0044 32.6 35.3 2.7257 43.7 TRIG_00632180
------------------------------------------
Foreground time interval of the image:
0.064 9.721 (delta_t = 9.657 [sec])
Background time interval of the image:
-60.080 0.064 (delta_t = 60.144 [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 0.064 sec. to 28.112 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.61114 ( -0.0751694 0.0755737 )
Norm@50keV : 8.31334E-03 ( -0.000350999 0.000350302 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.08 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 57 degrees of freedom
# Null hypothesis probability = 3.647623e-01
Photon flux (15-150 keV) in 28.05 sec: 1.07202 ( -0.0465958 0.0466923 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.17792e-06 ( -9.77596e-08 9.80937e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.064 sec. to 28.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27713 ( -0.307784 0.287252 )
Epeak [keV] : 110.224 ( -30.5304 290.7 )
Norm@50keV : 1.21512E-02 ( -0.00330835 0.00493619 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.08 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 56 degrees of freedom
# Null hypothesis probability = 4.718078e-01
Photon flux (15-150 keV) in 28.05 sec: 1.05065 ( -0.04981 0.04988 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12473e-06 ( -1.08792e-07 1.085e-07 ) ergs/cm2
Band function
Time interval is from 0.064 sec. to 28.112 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.27722 ( -0.28747 0.278262 )
beta : -10.0000 ( 10 1.77636e-14 )
Epeak [keV] : 110.219 ( -26.3966 289.368 )
Norm@50keV : 1.21485E-02 ( -0.0033027 0.00494014 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.08 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 55 degrees of freedom
# Null hypothesis probability = 4.341031e-01
Photon flux (15-150 keV) in 28.05 sec: 1.04692 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.13215e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.6368 ( )
R^2/D10^2 : 0.126161 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 181.86 using 59 PHA bins.
# Reduced chi-squared = 3.1904 for 57 degrees of freedom
# Null hypothesis probability = 5.884032e-15
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.593e-07 1.286e-08
25- 50 6.187e-07 3.310e-08
50-150 8.920e-07 7.363e-08
15-150 1.670e-06 7.980e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 176.215 (-34.6953 -175.936)
Norm : 4.35294 (-0.202336 0.219144)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.06 using 59 PHA bins.
# Reduced chi-squared = 0.9836 for 57 degrees of freedom
# Null hypothesis probability = 5.102501e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.087e-07 2.076e-08
25- 50 5.848e-07 6.129e-08
50-150 1.229e-06 3.574e-07
15-150 2.122e-06 4.452e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.86377 (-0.952968 1.04543)
R1^2/D10^2 : 1.21394 (-0.46157 0.858447)
kT2 [keV] : 24.9750 (-3.11062 4.38552)
R2^2/D10^2 : 1.47860E-02 (-0.00664533 0.00977691)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.72 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.475386e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.974e-07 5.300e-08
25- 50 5.876e-07 6.101e-08
50-150 1.231e-06 1.864e-07
15-150 2.116e-06 2.590e-07
Peak spectrum fit
Power-law model
Time interval is from 5.368 sec. to 6.368 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40373 ( -0.105669 0.105982 )
Norm@50keV : 3.85433E-02 ( -0.00243438 0.00243158 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.17 using 59 PHA bins.
# Reduced chi-squared = 1.371 for 57 degrees of freedom
# Null hypothesis probability = 3.287357e-02
Photon flux (15-150 keV) in 1 sec: 4.69785 ( -0.30192 0.30227 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.72148e-07 ( -2.57884e-08 2.59079e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.368 sec. to 6.368 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.809997 ( -0.475354 0.429913 )
Epeak [keV] : 104.064 ( -25.7255 126.578 )
Norm@50keV : 7.53983E-02 ( -0.028442 0.0518062 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.41 using 59 PHA bins.
# Reduced chi-squared = 1.293 for 56 degrees of freedom
# Null hypothesis probability = 6.909657e-02
Photon flux (15-150 keV) in 1 sec: 4.58618 ( -0.31231 0.31231 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.59099e-07 ( -2.7892e-08 2.7841e-08 ) ergs/cm2
Band function
Time interval is from 5.368 sec. to 6.368 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.809907 ( -0.286726 0.436414 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 104.042 ( -18.159 126.324 )
Norm@50keV : 7.54018E-02 ( -0.0284424 0.0518511 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.41 using 59 PHA bins.
# Reduced chi-squared = 1.317 for 55 degrees of freedom
# Null hypothesis probability = 5.777654e-02
Photon flux (15-150 keV) in 1 sec: 4.60947 ( ) 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] : 16.1556 ( )
R^2/D10^2 : 0.427271 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 114.87 using 59 PHA bins.
# Reduced chi-squared = 2.0153 for 57 degrees of freedom
# Null hypothesis probability = 8.836735e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.301e-08 2.990e-09
25- 50 9.762e-08 8.240e-09
50-150 1.787e-07 2.115e-08
15-150 2.994e-07 2.440e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 19.4722 (-1.21829 1.21822)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.78 using 59 PHA bins.
# Reduced chi-squared = 1.400 for 57 degrees of freedom
# Null hypothesis probability = 2.488159e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.850e-08 3.075e-09
25- 50 9.329e-08 6.915e-09
50-150 2.046e-07 5.155e-08
15-150 3.464e-07 5.445e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.05742 (-1.58967 1.78712)
R1^2/D10^2 : 2.69323 (-1.19492 2.64744)
kT2 [keV] : 27.2384 (-4.82891 8.65548)
R2^2/D10^2 : 5.39881E-02 (-0.0337887 0.0587873)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.40 using 59 PHA bins.
# Reduced chi-squared = 1.280 for 55 degrees of freedom
# Null hypothesis probability = 7.898568e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.842e-08 1.243e-08
25- 50 9.557e-08 2.386e-08
50-150 2.274e-07 9.684e-08
15-150 3.614e-07 1.060e-07
Plot creation:
Mon Feb 23 17:54:45 EST 2015