batgrbproduct Analysis for Trigger=724438
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 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Wed Nov 30 12:27:51 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger724438/GCN5_download_cron
======================================================================
Trigger: 00724438 Segment: 000
BAT Trigger Time: 502096317.088 [s; MET]
Trigger Stop: 502096317.472 [s; MET]
UTC: 2016-11-29T07:11:39.857180 [includes UTCF correction]
Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 32 ms to TRIGTIME + 320 ms
BAT
RA: 316.192888589222 Dec: 32.125124540387 [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: 32.4499614791759 [ if not an image trigger ]
Image S/N Ratio: 8.73
Flight Position: [ source = BAT ]
RA: 316.192888589222 Dec: 32.125124540387 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 316.22125050216 Dec: 32.1367093380022 [deg; J2000]
{ 21h 04m 53.1s , +32d 08' 12.2" }
+/- 1.85268953764416 [arcmin] (estimated 90% radius based on SNR)
+/- 0.890429033696531 [arcmin] (formal 1-sigma fit error)
SNR: 12.6050092036686
Angular difference between Flight and Ground position is 1.599948 arcmin
Partial Coding Fraction: 0.6953125 [ including projection effects ]
Duration
T90: 35.539999961853 +/- 2.09357115934511
Measured from: 6.18000012636185
to: 41.7200000882149 [s; relative to TRIGTIME]
T50: 15.3479999303818 +/- 2.1700691650944
Measured from: 18.0680001378059
to: 33.4160000681877 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 26.6439999938011
to: 27.6439999938011 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0559999942779541
to: 44.5839999914169 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.533519 2.159950 1.611133 0.360366
0.049656 0.053207 0.046867 0.038778 [error]
Peak 0.084527 0.144122 0.142680 0.031905
0.008504 0.009677 0.008952 0.006957 [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 5.29e-07 9.29e-07 1.25e-06 3.44e-06 3.63e-06 6.15e-06 erg/cm2
Error 3.09e-08 3.16e-08 4.75e-08 2.95e-07 1.15e-07 3.22e-07 erg/cm2
Peak flux Power-law 8.89e-01 1.07e+00 9.32e-01 1.39e+00 3.38e+00 4.28e+00 ph/cm2/s
Error 1.17e-01 8.65e-02 7.01e-02 2.21e-01 2.37e-01 2.98e-01 ph/cm2/s
Fluence Cutoff-PL 5.10e-07 9.41e-07 1.26e-06 2.72e-06 3.59e-06 5.43e-06 erg/cm2
Error 3.87e-08 3.50e-08 5.23e-08 7.55e-07 1.27e-07 7.79e-07 erg/cm2
Peak flux Cutoff-PL 8.18e-01 1.10e+00 9.72e-01 9.88e-01 3.34e+00 3.87e+00 ph/cm2/s
Error 1.45e-01 9.48e-02 8.69e-02 4.92e-01 2.44e-01 5.00e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 8.28e-01 1.09e+00 9.66e-01 1.01e+00 3.34e+00 3.90e+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 1.574 0.056 - - 8.68e-03 2.63e-04 55.480 57
CPL 1.406 0.211 188.0 -54.9 1.04e-02 2.36e-03 53.730 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.199 0.115 - - 2.88e-02 1.93e-03 44.010 57
CPL 0.853 0.439 185.7 -54.2 4.16e-02 2.02e-02 42.190 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: 33.088000 sec.
T50 in the 50-300 keV band: 14.656000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 44.528 0.056 44.584
T90 35.540 6.180 41.720
T50 15.348 18.068 33.416
Peak 1.000 26.644 27.644
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
316.2213 +32.1367 0.0153 36.4 -9.0 0.5775 12.6 TRIG_00724438
------------------------------------------
Foreground time interval of the image:
0.056 8.913 (delta_t = 8.857 [sec])
Background time interval of the image:
-239.088 0.056 (delta_t = 239.144 [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 0.056 sec. to 44.584 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57404 ( -0.056349 0.0564192 )
Norm@50keV : 8.67741E-03 ( -0.000262573 0.00026246 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.48 using 59 PHA bins.
# Reduced chi-squared = 0.9734 for 57 degrees of freedom
# Null hypothesis probability = 5.321210e-01
Photon flux (15-150 keV) in 44.53 sec: 1.10631 ( -0.0367331 0.0368424 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.62565e-06 ( -1.1527e-07 1.15447e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.056 sec. to 44.584 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40557 ( -0.22688 0.194624 )
Epeak [keV] : 187.968 ( -78.2121 -187.998 )
Norm@50keV : 1.04274E-02 ( -0.00188195 0.00284117 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.73 using 59 PHA bins.
# Reduced chi-squared = 0.9594 for 56 degrees of freedom
# Null hypothesis probability = 5.613323e-01
Photon flux (15-150 keV) in 44.53 sec: 1.09347 ( -0.03991 0.04005 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.58557e-06 ( -1.27694e-07 1.2704e-07 ) ergs/cm2
Band function
Time interval is from 0.056 sec. to 44.584 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.23157 ( -2.11968 -0.0634926 )
beta : -1.62587 ( -0.146031 0.0795274 )
Epeak [keV] : 30.7934 ( -6.96125 79.8604 )
Norm@50keV : 0.870023 ( -0.870347 391.561 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.14 using 59 PHA bins.
# Reduced chi-squared = 0.9117 for 55 degrees of freedom
# Null hypothesis probability = 6.603764e-01
Photon flux (15-150 keV) in 44.53 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] : 15.5453 ( )
R^2/D10^2 : 0.105018 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 299.19 using 59 PHA bins.
# Reduced chi-squared = 5.2489 for 57 degrees of freedom
# Null hypothesis probability = 1.482046e-34
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.351e-07 1.436e-08
25- 50 9.647e-07 4.208e-08
50-150 1.611e-06 8.416e-08
15-150 2.811e-06 9.507e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-26.0097 -200)
Norm : 4.46254 (-0.134502 0.134502)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.77 using 59 PHA bins.
# Reduced chi-squared = 0.9609 for 57 degrees of freedom
# Null hypothesis probability = 5.590468e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.953e-07 1.759e-08
25- 50 9.528e-07 3.273e-08
50-150 2.090e-06 6.835e-08
15-150 3.538e-06 1.176e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.02608 (-0.785164 0.822414)
R1^2/D10^2 : 0.758143 (-0.20637 0.312911)
kT2 [keV] : 30.7549 (-3.77216 5.35434)
R2^2/D10^2 : 7.32279E-03 (-0.0030629 0.00437161)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.02 using 59 PHA bins.
# Reduced chi-squared = 0.9822 for 55 degrees of freedom
# Null hypothesis probability = 5.120097e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.417e-07 4.166e-08
25- 50 9.899e-07 6.167e-08
50-150 2.142e-06 2.311e-07
15-150 3.574e-06 2.901e-07
Peak spectrum fit
Power-law model
Time interval is from 26.644 sec. to 27.644 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19922 ( -0.115435 0.114234 )
Norm@50keV : 2.88016E-02 ( -0.00193385 0.00193274 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.01 using 59 PHA bins.
# Reduced chi-squared = 0.7721 for 57 degrees of freedom
# Null hypothesis probability = 8.961732e-01
Photon flux (15-150 keV) in 1 sec: 3.38036 ( -0.23664 0.237055 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.92272e-07 ( -2.11607e-08 2.12159e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 26.644 sec. to 27.644 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.852606 ( -0.485055 0.392827 )
Epeak [keV] : 185.666 ( -77.1744 -185.666 )
Norm@50keV : 4.15656E-02 ( -0.0138942 0.0265329 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.19 using 59 PHA bins.
# Reduced chi-squared = 0.7534 for 56 degrees of freedom
# Null hypothesis probability = 9.140714e-01
Photon flux (15-150 keV) in 1 sec: 3.33545 ( -0.24347 0.24355 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.8812e-07 ( -2.2185e-08 2.2065e-08 ) ergs/cm2
Band function
Time interval is from 26.644 sec. to 27.644 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.863909 ( 0.565806 0.565806 )
beta : -8.21014 ( 9.29737 19.2969 )
Epeak [keV] : 192.522 ( -67.7434 456.366 )
Norm@50keV : 4.09718E-02 ( -0.0085578 0.0200628 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.20 using 59 PHA bins.
# Reduced chi-squared = 0.7673 for 55 degrees of freedom
# Null hypothesis probability = 8.971419e-01
Photon flux (15-150 keV) in 1 sec: 3.33982 ( ) 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] : 19.6475 (-1.6949 1.91084)
R^2/D10^2 : 0.166538 (-0.0441332 0.0585142)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.50 using 59 PHA bins.
# Reduced chi-squared = 1.430 for 57 degrees of freedom
# Null hypothesis probability = 1.829776e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.248e-08 1.715e-09
25- 50 6.143e-08 6.535e-09
50-150 1.753e-07 1.775e-08
15-150 2.492e-07 2.180e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-12.9552 -200)
Norm : 14.1408 (-0.967757 0.967757)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.53 using 59 PHA bins.
# Reduced chi-squared = 1.220 for 57 degrees of freedom
# Null hypothesis probability = 1.233884e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.522e-08 2.810e-09
25- 50 6.775e-08 5.890e-09
50-150 1.486e-07 4.069e-08
15-150 2.516e-07 5.130e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.48625 (-2.2706 2.57501)
R1^2/D10^2 : 1.46826 (-0.780275 2.47757)
kT2 [keV] : 32.1216 (-6.52476 13.9917)
R2^2/D10^2 : 2.72254E-02 (-0.0186871 0.0188579)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.38 using 59 PHA bins.
# Reduced chi-squared = 0.7706 for 55 degrees of freedom
# Null hypothesis probability = 8.933605e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.412e-08 8.699e-09
25- 50 6.518e-08 1.826e-08
50-150 2.010e-07 7.830e-08
15-150 2.903e-07 9.620e-08
Plot creation:
Wed Nov 30 12:34:42 EST 2016