batgrbproduct Analysis for Trigger=654042
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done using the HEASARC data.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Wed Sep 2 20:31:04 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger654042/batgroup_hand_proc
======================================================================
Trigger: 00654042 Segment: 000
BAT Trigger Time: 462814010.752 [s; MET]
Trigger Stop: 462814018.944 [s; MET]
UTC: 2015-09-01T15:26:35.677500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 183.585766451719 Dec: 25.0385495735529 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.11
Image Trigger?: NO
Rate S/N Ratio: 10.3440804327886 [ if not an image trigger ]
Image S/N Ratio: 7.11
Flight Position: [ source = BAT ]
RA: 183.585766451719 Dec: 25.0385495735529 [deg; J2000]
Ground Position: [ source = BAT pre-slew image ]
RA: 183.608730699 Dec: 25.0764378939 [deg; J2000]
{ 12h 14m 26.1s , +25d 04' 35.2" }
+/- 2.70879824287 [arcmin] (estimated 90% radius based on SNR)
SNR: 7.32694324708
Angular difference between Flight and Ground position is 2.593421 arcmin
Partial Coding Fraction: 0.4140625 [ including projection effects ]
Duration
T90: 64 +/- 35.7770876399966
Measured from: -61.7519999742508
to: 2.24800002574921 [s; relative to TRIGTIME]
T50: 64 +/- 32
Measured from: -61.7519999742508
to: 2.24800002574921 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 9.74800002574921
to: 10.7480000257492 [s; relative to TRIGTIME]
Total Fluence
Measured from: -61.7519999742508
to: 18.2480000257492 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.531379 0.288616 0.123438 0.004628
0.076724 0.076476 0.066419 0.057836 [error]
Peak 0.004216 0.001958 0.004394 0.004988
0.009256 0.008401 0.007534 0.006634 [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 1.70e-07 1.50e-07 9.11e-08 8.35e-08 4.48e-07 4.95e-07 erg/cm2
Error 4.02e-08 4.20e-08 5.25e-08 1.04e-07 1.27e-07 1.79e-07 erg/cm2
Peak flux Power-law 3.26e-02 3.65e-02 2.92e-02 3.88e-02 1.13e-01 1.37e-01 ph/cm2/s
Error 9.99e-02 5.56e-02 4.24e-02 4.48e-01 1.66e-01 4.63e-01 ph/cm2/s
Fluence Cutoff-PL 1.70e-07 1.53e-07 8.52e-08 4.75e-08 4.35e-07 4.56e-07 erg/cm2
Error 4.07e-08 4.80e-08 7.44e-08 1.02e-07 1.43e-07 1.77e-07 erg/cm2
Peak flux Cutoff-PL 3.02e-02 3.60e-02 2.92e-02 4.03e-02 1.12e-01 1.33e-01 ph/cm2/s
Error 9.98e-02 7.62e-02 4.98e-02 -------- 1.66e-01 -------- ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- 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 2.723 0.535 - - 5.22e-04 2.23e-04 55.530 57
CPL 1.844 0.000 5.5 0.0 2.08e-03 0.00e+00 55.730 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.333 0.000 - - 9.40e-04 1.29e-03 63.930 57
CPL 1.448 0.000 9999.4 0.0 9.22e-04 0.00e+00 63.930 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 80.000 -61.752 18.248
T90 64.000 -61.752 2.248
T50 64.000 -61.752 2.248
Peak 1.000 9.748 10.748
Image
Pre-slew 15.0-50.0 keV image (Event data)
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name
183.609 25.076 0.026 33.723 -62.908 0.292 7.327 TRIG_00654042
Image time interval: 0.000 to 8.192 [sec]
Background time interval of the image:
-132.651 -61.752 (delta_t = 70.899 [sec])
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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)
Spectral Evolution
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from -61.752 sec. to 18.248 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.72291 ( -0.475321 0.594258 )
Norm@50keV : 5.21706E-04 ( -0.000218482 0.000227627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.53 using 59 PHA bins.
# Reduced chi-squared = 0.9742 for 57 degrees of freedom
# Null hypothesis probability = 5.304198e-01
Photon flux (15-150 keV) in 80 sec: 0.118224 ( -0.0245434 0.0245882 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.47612e-07 ( -1.20859e-07 1.32906e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -61.752 sec. to 18.248 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84362 ( )
Epeak [keV] : 5.53031 ( )
Norm@50keV : 2.08182E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.73 using 59 PHA bins.
# Reduced chi-squared = 0.9952 for 56 degrees of freedom
# Null hypothesis probability = 4.850267e-01
Photon flux (15-150 keV) in 80 sec: 0.117540 ( -0.024996 0.024974 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.35418e-07 ( -1.42965e-07 1.42379e-07 ) ergs/cm2
Band function
Time interval is from -61.752 sec. to 18.248 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.906590 ( 1.68682 1.68682 )
beta : -3.09875 ( 2.93097 0.653601 )
Epeak [keV] : 15.6450 ( -9.47358 55.7423 )
Norm@50keV : 1.16802E-02 ( -0.012404 599.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.08 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 55 degrees of freedom
# Null hypothesis probability = 4.715115e-01
Photon flux (15-150 keV) in 80 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] : 5.41976 (-1.09949 1.44852)
R^2/D10^2 : 0.664938 (-0.430893 1.22875)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.84 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.439035e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.767e-07 8.362e-08
25- 50 1.401e-07 7.108e-08
50-150 8.292e-09 7.226e-09
15-150 3.251e-07 1.783e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 22.3095 (-9.28218 18.3522)
Norm : 1.25326 (-0.536432 1.1278)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.06 using 59 PHA bins.
# Reduced chi-squared = 0.9834 for 57 degrees of freedom
# Null hypothesis probability = 5.105061e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.696e-07 5.648e-08
25- 50 1.610e-07 7.125e-08
50-150 5.760e-08 4.655e-08
15-150 3.883e-07 1.448e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.63939 (-1.42048 1.44971)
R1^2/D10^2 : 1.18319 (-0.591526 4.61014)
kT2 [keV] : 19.1604 (-8.53688 -19.0986)
R2^2/D10^2 : 1.76000E-03 (-0.00176412 0.0152759)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.12 using 59 PHA bins.
# Reduced chi-squared = 0.9841 for 55 degrees of freedom
# Null hypothesis probability = 5.080746e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.791e-07 1.037e-07
25- 50 1.403e-07 7.352e-08
50-150 1.350e-07 1.001e-07
15-150 4.544e-07 2.443e-07
Peak spectrum fit
Power-law model
Time interval is from 9.748 sec. to 10.748 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33280 ( -1.32552 -1.32552 )
Norm@50keV : 9.40088E-04 ( -0.000939693 0.0016322 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.93 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 57 degrees of freedom
# Null hypothesis probability = 2.463515e-01
Photon flux (15-150 keV) in 1 sec: 0.112548 ( -0.112548 0.219866 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.23793e-09 ( -9.23864e-09 1.73838e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 9.748 sec. to 10.748 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44786 ( -1.42449 -1.42449 )
Epeak [keV] : 9999.35 ( -9999.36 -9999.36 )
Norm@50keV : 9.22433E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.93 using 59 PHA bins.
# Reduced chi-squared = 1.142 for 56 degrees of freedom
# Null hypothesis probability = 2.180565e-01
Photon flux (15-150 keV) in 1 sec: 0.112444 ( -0.112444 0.219294 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.01781e-09 ( -9.01781e-09 1.74444e-08 ) ergs/cm2
Band function
Time interval is from 9.748 sec. to 10.748 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.03056 ( 1.04721 1.04721 )
beta : -1.30203 ( 1.31739 1.31739 )
Epeak [keV] : 43.0236 ( -39.2914 -39.2914 )
Norm@50keV : 1.81507E-03 ( -0.00183919 0.347791 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.93 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 55 degrees of freedom
# Null hypothesis probability = 1.916709e-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] : 29.9362 (-29.4616 -29.4616)
R^2/D10^2 : 1.23208E-03 (-0.00139294 -0.00139294)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.09 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 57 degrees of freedom
# Null hypothesis probability = 2.418830e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.629e-10 8.160e-10
25- 50 2.169e-09 2.657e-09
50-150 1.499e-09 1.947e-09
15-150 4.431e-09 4.547e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 0.323915 (-0.32343 -0.32343)
Norm : 9.24924E+16 (-1.02092e+17 -1.02092e+17)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.85 using 59 PHA bins.
# Reduced chi-squared = 1.120 for 57 degrees of freedom
# Null hypothesis probability = 2.484203e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.364e-09 2.963e-10
25- 50 3.374e-11 1.098e-11
50-150 3.755e-15 7.795e-16
15-150 1.397e-09 4.101e-10
Double BB
# Reduced chi-squared = 1.152 for 55 degrees of freedom
# Reduced chi-squared = 1.151 for 55 degrees of freedom
# Reduced chi-squared = 1.150 for 55 degrees of freedom
# Reduced chi-squared = 1.149 for 55 degrees of freedom
# Reduced chi-squared = 1.149 for 55 degrees of freedom
# Reduced chi-squared = 1.148 for 55 degrees of freedom
# Null hypothesis probability = 2.024339e-01
# Null hypothesis probability = 2.052704e-01
# Null hypothesis probability = 2.071672e-01
# Null hypothesis probability = 2.084955e-01
# Null hypothesis probability = 2.093591e-01
# Null hypothesis probability = 2.098881e-01
# Null hypothesis probability = 2.101821e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.306e-09 2.222e-10
25- 50 1.030e-09 7.885e-10
50-150 7.101e-09 5.575e-09
15-150 9.436e-09 6.520e-09
Plot creation:
Wed Sep 2 21:40:26 EDT 2015