batgrbproduct Analysis for Trigger=615672
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): Sat Oct 18 22:30:43 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger615672/batgroup_hand_proc
======================================================================
Trigger: 00615672 Segment: 000
BAT Trigger Time: 435263140.672 [s; MET]
Trigger Stop: 435263141.696 [s; MET]
UTC: 2014-10-17T18:25:28.004480 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 93.6292819665991 Dec: -58.5544655852862 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.16
Image Trigger?: NO
Rate S/N Ratio: 15.4596248337403 [ if not an image trigger ]
Image S/N Ratio: 11.16
Flight Position: [ source = BAT ]
RA: 93.6292819665991 Dec: -58.5544655852862 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 93.6008231623066 Dec: -58.5960799331458 [deg; J2000]
{ 06h 14m 24.2s , -58d 35' 45.9" }
+/- 2.11419956061927 [arcmin] (estimated 90% radius based on SNR)
+/- 0.911957118345924 [arcmin] (formal 1-sigma fit error)
SNR: 10.4381642245573
Angular difference between Flight and Ground position is 2.650828 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 55.7479999661446 +/- 2.80564572984189
Measured from: 0.756000101566315
to: 56.5040000677109 [s; relative to TRIGTIME]
T50: 4.01999992132187 +/- 0.283746391118834
Measured from: 46.2800001502037
to: 50.3000000715256 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 46.6040000319481
to: 47.6040000319481 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.21999996900558
to: 65.0640000104904 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.408262 1.984246 1.401863 0.275979
0.053834 0.055947 0.048404 0.039166 [error]
Peak 0.153644 0.304780 0.267805 0.063709
0.008140 0.009728 0.009403 0.005917 [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 5.17e-07 8.61e-07 1.09e-06 2.76e-06 3.23e-06 5.22e-06 erg/cm2
Error 3.25e-08 3.23e-08 4.92e-08 2.71e-07 1.19e-07 3.04e-07 erg/cm2
Peak flux Power-law 1.95e+00 2.18e+00 1.74e+00 2.31e+00 6.71e+00 8.17e+00 ph/cm2/s
Error 1.36e-01 9.47e-02 7.49e-02 2.03e-01 2.64e-01 3.12e-01 ph/cm2/s
Fluence Cutoff-PL 4.56e-07 9.03e-07 1.13e-06 1.28e-06 3.10e-06 3.77e-06 erg/cm2
Error 4.04e-08 3.77e-08 5.50e-08 3.99e-07 1.32e-07 4.16e-07 erg/cm2
Peak flux Cutoff-PL 1.59e+00 2.29e+00 1.91e+00 1.16e+00 6.49e+00 6.96e+00 ph/cm2/s
Error 1.68e-01 1.08e-01 9.60e-02 2.50e-01 2.72e-01 3.72e-01 ph/cm2/s
Fluence Band 4.51e-07 8.99e-07 1.13e-06 1.32e-06 3.10e-06 3.82e-06 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.62e+00 2.28e+00 1.91e+00 1.26e+00 6.52e+00 7.08e+00 ph/cm2/s
Error -------- -------- 7.91e-02 -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.660 0.063 - - 5.25e-03 1.85e-04 55.800 57
CPL 1.047 0.277 80.4 17.2 1.04e-02 3.21e-03 39.440 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.323 0.062 - - 5.60e-02 2.11e-03 77.220 57
CPL 0.496 0.286 101.4 18.5 1.34e-01 4.04e-02 48.380 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: 10.496000 sec.
T50 in the 50-300 keV band: 3.264000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 66.284 -1.220 65.064
T90 55.748 0.756 56.504
T50 4.020 46.280 50.300
Peak 1.000 46.604 47.604
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
93.6008 -58.5961 0.0185 35.9 -155.1 0.5452 10.4 TRIG_00615672
------------------------------------------
Foreground time interval of the image:
-1.220 14.429 (delta_t = 15.649 [sec])
Background time interval of the image:
-239.672 -1.220 (delta_t = 238.452 [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 -1.220 sec. to 65.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66015 ( -0.0625526 0.0628382 )
Norm@50keV : 5.25295E-03 ( -0.000184942 0.000184749 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.80 using 59 PHA bins.
# Reduced chi-squared = 0.9789 for 57 degrees of freedom
# Null hypothesis probability = 5.201732e-01
Photon flux (15-150 keV) in 66.28 sec: 0.688219 ( -0.025802 0.0258741 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.23485e-06 ( -1.18767e-07 1.19004e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.220 sec. to 65.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04733 ( -0.285148 0.268196 )
Epeak [keV] : 80.4100 ( -11.0354 23.4388 )
Norm@50keV : 1.04009E-02 ( -0.00263159 0.00379315 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.44 using 59 PHA bins.
# Reduced chi-squared = 0.7043 for 56 degrees of freedom
# Null hypothesis probability = 9.542977e-01
Photon flux (15-150 keV) in 66.28 sec: 0.661369 ( -0.027914 0.028014 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.10305e-06 ( -1.32408e-07 1.32255e-07 ) ergs/cm2
Band function
Time interval is from -1.220 sec. to 65.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.04727 ( -0.230734 0.25922 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 80.3952 ( -8.58524 23.4367 )
Norm@50keV : 1.04007E-02 ( -0.00263269 0.00379786 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.44 using 59 PHA bins.
# Reduced chi-squared = 0.7171 for 55 degrees of freedom
# Null hypothesis probability = 9.437677e-01
Photon flux (15-150 keV) in 66.28 sec: 0.661096 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.10159e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.6454 ( )
R^2/D10^2 : 8.06184E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 174.30 using 59 PHA bins.
# Reduced chi-squared = 3.0579 for 57 degrees of freedom
# Null hypothesis probability = 8.154126e-14
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.408e-07 1.538e-08
25- 50 9.357e-07 3.911e-08
50-150 1.351e-06 8.351e-08
15-150 2.528e-06 1.011e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 155.282 (-25.2636 28.5443)
Norm : 2.81086 (-0.115998 0.138845)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.41 using 59 PHA bins.
# Reduced chi-squared = 0.7266 for 57 degrees of freedom
# Null hypothesis probability = 9.400365e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.771e-07 3.069e-08
25- 50 8.886e-07 5.667e-08
50-150 1.779e-06 4.603e-07
15-150 3.145e-06 4.944e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.27350 (-0.998046 1.06399)
R1^2/D10^2 : 0.598119 (-0.210346 0.38758)
kT2 [keV] : 23.4170 (-2.60089 3.66606)
R2^2/D10^2 : 1.11795E-02 (-0.00492892 0.00692513)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.30 using 59 PHA bins.
# Reduced chi-squared = 0.7509 for 55 degrees of freedom
# Null hypothesis probability = 9.144382e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.230e-07 5.150e-08
25- 50 9.157e-07 8.716e-08
50-150 1.735e-06 2.217e-07
15-150 3.074e-06 2.936e-07
Peak spectrum fit
Power-law model
Time interval is from 46.604 sec. to 47.604 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32320 ( -0.0619192 0.0619766 )
Norm@50keV : 5.60028E-02 ( -0.00210552 0.00210551 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.22 using 59 PHA bins.
# Reduced chi-squared = 1.355 for 57 degrees of freedom
# Null hypothesis probability = 3.852307e-02
Photon flux (15-150 keV) in 1 sec: 6.71067 ( -0.264 0.264329 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.50345e-07 ( -2.22364e-08 2.22658e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 46.604 sec. to 47.604 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.495985 ( -0.294464 0.277303 )
Epeak [keV] : 101.433 ( -13.3318 23.7561 )
Norm@50keV : 0.134383 ( -0.0333817 0.0474813 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.38 using 59 PHA bins.
# Reduced chi-squared = 0.8640 for 56 degrees of freedom
# Null hypothesis probability = 7.553153e-01
Photon flux (15-150 keV) in 1 sec: 6.49388 ( -0.27141 0.27193 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.34102e-07 ( -2.3477e-08 2.3415e-08 ) ergs/cm2
Band function
Time interval is from 46.604 sec. to 47.604 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.495902 ( -0.260011 0.290807 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 101.414 ( -9.20607 23.7632 )
Norm@50keV : 0.134394 ( -0.0334053 0.0474867 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.38 using 59 PHA bins.
# Reduced chi-squared = 0.8797 for 55 degrees of freedom
# Null hypothesis probability = 7.236546e-01
Photon flux (15-150 keV) in 1 sec: 6.52478 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.34331e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.0273 ( )
R^2/D10^2 : 0.438789 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 132.73 using 59 PHA bins.
# Reduced chi-squared = 2.3286 for 57 degrees of freedom
# Null hypothesis probability = 5.597638e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.854e-08 2.055e-09
25- 50 1.321e-07 6.450e-09
50-150 3.118e-07 2.040e-08
15-150 4.725e-07 1.975e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 28.1659 (-1.06673 1.06649)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 103.78 using 59 PHA bins.
# Reduced chi-squared = 1.8206 for 57 degrees of freedom
# Null hypothesis probability = 1.519964e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.015e-08 2.670e-09
25- 50 1.350e-07 5.850e-09
50-150 2.960e-07 1.210e-08
15-150 5.011e-07 1.975e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.77181 (-1.47702 1.60848)
R1^2/D10^2 : 2.47930 (-0.896081 1.75208)
kT2 [keV] : 27.1845 (-3.19695 4.93952)
R2^2/D10^2 : 8.36519E-02 (-0.0399692 0.053571)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.45 using 59 PHA bins.
# Reduced chi-squared = 0.8627 for 55 degrees of freedom
# Null hypothesis probability = 7.553077e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.688e-08 8.265e-09
25- 50 1.354e-07 1.690e-08
50-150 3.529e-07 6.610e-08
15-150 5.351e-07 8.375e-08
Plot creation:
Sun Oct 19 10:13:45 EDT 2014