batgrbproduct Analysis for Trigger=671447
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 Jan 24 17:22:26 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger671447/GCN5_download_cron
======================================================================
Trigger: 00671447 Segment: 000
BAT Trigger Time: 475232315.904 [s; MET]
Trigger Stop: 475232316.928 [s; MET]
UTC: 2016-01-23T08:58:20.166340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 150.286562972773 Dec: -33.7790721449038 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.65
Image Trigger?: NO
Rate S/N Ratio: 16.9115345252878 [ if not an image trigger ]
Image S/N Ratio: 8.65
Flight Position: [ source = BAT ]
RA: 150.286562972773 Dec: -33.7790721449038 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 150.276661605786 Dec: -33.7897544489883 [deg; J2000]
{ 10h 01m 06.4s , -33d 47' 23.1" }
+/- 1.5718869972961 [arcmin] (estimated 90% radius based on SNR)
+/- 0.608200666236389 [arcmin] (formal 1-sigma fit error)
SNR: 15.9410341507683
Angular difference between Flight and Ground position is 0.809076 arcmin
Partial Coding Fraction: 0.6875 [ including projection effects ]
Duration
T90: 3.95199990272522 +/- 0.623246350817473
Measured from: -1.27599984407425
to: 2.67600005865097 [s; relative to TRIGTIME]
T50: 2.1159999370575 +/- 0.459077335217155
Measured from: -0.547999858856201
to: 1.56800007820129 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.00800001621246338
to: 1.00800001621246 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.04799997806549
to: 3 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.141894 0.259856 0.143525 0.041684
0.018826 0.019828 0.016844 0.013424 [error]
Peak 0.045336 0.071206 0.042803 0.016523
0.008666 0.009240 0.007887 0.006160 [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 4.77e-08 8.72e-08 1.23e-07 3.61e-07 3.51e-07 6.19e-07 erg/cm2
Error 7.50e-09 8.82e-09 1.60e-08 9.76e-08 3.92e-08 1.11e-07 erg/cm2
Peak flux Power-law 4.47e-01 4.38e-01 3.00e-01 3.22e-01 1.31e+00 1.51e+00 ph/cm2/s
Error 1.12e-01 7.18e-02 6.26e-02 1.32e-01 2.10e-01 2.45e-01 ph/cm2/s
Fluence Cutoff-PL 4.28e-08 9.79e-08 1.25e-07 9.40e-08 3.22e-07 3.59e-07 erg/cm2
Error 8.52e-09 1.25e-08 1.88e-08 1.09e-07 4.52e-08 1.16e-07 erg/cm2
Peak flux Cutoff-PL 3.91e-01 4.91e-01 3.14e-01 1.09e-01 1.27e+00 1.30e+00 ph/cm2/s
Error 1.29e-01 9.67e-02 7.36e-02 1.85e-01 2.15e-01 2.67e-01 ph/cm2/s
Fluence Band 3.88e-08 1.06e-07 1.16e-07 2.16e-07 3.30e-07 4.77e-07 erg/cm2
Error 9.37e-09 1.39e-08 1.80e-08 1.06e-07 4.11e-08 1.18e-07 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 1.509 0.162 - - 7.34e-03 7.48e-04 47.690 57
CPL 0.567 0.823 69.6 48.5 2.39e-02 3.28e-02 42.620 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.547 0.261 - - 1.04e-02 1.74e-03 57.020 57
CPL 0.533 1.301 66.9 -23.9 3.66e-02 1.17e-01 54.700 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: 3.840000 sec.
T50 in the 50-300 keV band: 1.664000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 5.048 -2.048 3.000
T90 3.952 -1.276 2.676
T50 2.116 -0.548 1.568
Peak 1.000 0.008 1.008
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
150.2767 -33.7898 0.0120 23.8 -107.2 0.5671 15.9 TRIG_00671447
------------------------------------------
Foreground time interval of the image:
-2.048 3.000 (delta_t = 5.048 [sec])
Background time interval of the image:
-239.904 -2.048 (delta_t = 237.856 [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 -2.048 sec. to 3.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50898 ( -0.161361 0.162288 )
Norm@50keV : 7.34404E-03 ( -0.000750442 0.000746283 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.69 using 59 PHA bins.
# Reduced chi-squared = 0.8367 for 57 degrees of freedom
# Null hypothesis probability = 8.053601e-01
Photon flux (15-150 keV) in 5.048 sec: 0.919053 ( -0.0912473 0.0913219 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.51184e-07 ( -3.89806e-08 3.94074e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.048 sec. to 3.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.566519 ( -0.914665 0.731449 )
Epeak [keV] : 69.6361 ( -16.0584 81.0006 )
Norm@50keV : 2.38752E-02 ( -0.0141452 0.0514282 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.62 using 59 PHA bins.
# Reduced chi-squared = 0.7611 for 56 degrees of freedom
# Null hypothesis probability = 9.061237e-01
Photon flux (15-150 keV) in 5.048 sec: 0.890135 ( -0.094352 0.094228 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.21646e-07 ( -4.47874e-08 4.56713e-08 ) ergs/cm2
Band function
Time interval is from -2.048 sec. to 3.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.78766 ( -1.7042 -1.22764 )
beta : -1.96951 ( -0.540187 0.346718 )
Epeak [keV] : 39.6727 ( -10.6419 20.2782 )
Norm@50keV : 0.860797 ( -0.905043 69.3174 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.14 using 59 PHA bins.
# Reduced chi-squared = 0.6935 for 55 degrees of freedom
# Null hypothesis probability = 9.593859e-01
Photon flux (15-150 keV) in 5.048 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.30179e-07 ( -3.30143e-07 -4.11064e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.0730 (-1.4073 1.64756)
R^2/D10^2 : 0.174344 (-0.0610235 0.0890427)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.65 using 59 PHA bins.
# Reduced chi-squared = 0.9413 for 57 degrees of freedom
# Null hypothesis probability = 6.013468e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.190e-08 5.300e-09
25- 50 1.105e-07 1.451e-08
50-150 1.198e-07 2.723e-08
15-150 2.622e-07 3.163e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.130 (-77.2341 -199.155)
Norm : 3.78059 (-0.368203 0.402787)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.90 using 59 PHA bins.
# Reduced chi-squared = 0.7877 for 57 degrees of freedom
# Null hypothesis probability = 8.773049e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.753e-08 9.399e-09
25- 50 9.142e-08 4.857e-08
50-150 2.004e-07 1.078e-07
15-150 3.394e-07 1.827e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.57290 (-2.09302 2.11108)
R1^2/D10^2 : 0.412940 (-0.185849 0.403329)
kT2 [keV] : 38.7187 (-31.411 -38.8967)
R2^2/D10^2 : 2.43992E-03 (-0.00217692 0.0167472)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.77 using 59 PHA bins.
# Reduced chi-squared = 0.6867 for 55 degrees of freedom
# Null hypothesis probability = 9.632053e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.071e-08 1.376e-08
25- 50 1.058e-07 3.628e-08
50-150 1.922e-07 9.828e-08
15-150 3.387e-07 1.373e-07
Peak spectrum fit
Power-law model
Time interval is from 0.008 sec. to 1.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54653 ( -0.258077 0.264216 )
Norm@50keV : 1.03842E-02 ( -0.00174889 0.00172744 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.02 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.741572e-01
Photon flux (15-150 keV) in 1 sec: 1.31326 ( -0.209912 0.210078 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.78054e-08 ( -1.76593e-08 1.79769e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.008 sec. to 1.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.532731 ( -1.50144 1.10018 )
Epeak [keV] : 66.9487 ( -19.1186 -66.9486 )
Norm@50keV : 3.66208E-02 ( -0.036621 0.1978 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.70 using 59 PHA bins.
# Reduced chi-squared = 0.9768 for 56 degrees of freedom
# Null hypothesis probability = 5.241891e-01
Photon flux (15-150 keV) in 1 sec: 1.27421 ( -0.21522 0.21508 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.01019e-08 ( -1.89785e-08 1.99801e-08 ) ergs/cm2
Band function
Time interval is from 0.008 sec. to 1.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.404832 ( -1.62709 -1.62709 )
beta : -2.02731 ( 1.93325 0.512874 )
Epeak [keV] : 47.1765 ( -38.5104 65.0448 )
Norm@50keV : 0.151214 ( -0.152042 255.264 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.31 using 59 PHA bins.
# Reduced chi-squared = 0.9875 for 55 degrees of freedom
# Null hypothesis probability = 5.008097e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.25019e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.4000 (-2.27459 2.80759)
R^2/D10^2 : 0.229386 (-0.113917 0.216296)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.28 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 57 degrees of freedom
# Null hypothesis probability = 3.924414e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.728e-09 2.603e-09
25- 50 3.104e-08 7.250e-09
50-150 3.585e-08 1.197e-08
15-150 7.562e-08 2.014e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 188.604 (-97.5028 -186.355)
Norm : 5.40910 (-0.86589 1.06292)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.75 using 59 PHA bins.
# Reduced chi-squared = 0.9780 for 57 degrees of freedom
# Null hypothesis probability = 5.221360e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.356e-08 7.730e-09
25- 50 2.592e-08 1.429e-08
50-150 5.579e-08 3.116e-08
15-150 9.528e-08 5.270e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.22212 (-4.94342 -8.22241)
R1^2/D10^2 : 0.807732 (-0.571803 15.2043)
kT2 [keV] : 24.0694 (-22.4077 -24.071)
R2^2/D10^2 : 1.84127E-02 (-0.017998 0.164931)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.36 using 59 PHA bins.
# Reduced chi-squared = 0.9885 for 55 degrees of freedom
# Null hypothesis probability = 4.988441e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.196e-08 6.905e-09
25- 50 2.898e-08 1.581e-08
50-150 5.066e-08 2.901e-08
15-150 9.161e-08 4.761e-08
Plot creation:
Sun Jan 24 17:26:42 EST 2016