batgrbproduct Analysis for Trigger=644259
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): Wed Jun 17 15:59:37 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger644259/GCN5_download_cron
======================================================================
Trigger: 00644259 Segment: 000
BAT Trigger Time: 456187772.992 [s; MET]
Trigger Stop: 456187789.376 [s; MET]
UTC: 2015-06-16T22:49:19.264160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 314.704655959612 Dec: -53.3935296118629 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.26
Image Trigger?: NO
Rate S/N Ratio: 16.9115345252878 [ if not an image trigger ]
Image S/N Ratio: 12.26
Flight Position: [ source = BAT ]
RA: 314.704655959612 Dec: -53.3935296118629 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 314.716832194222 Dec: -53.4042534709204 [deg; J2000]
{ 20h 58m 52.0s , -53d 24' 15.3" }
+/- 1.17303835255275 [arcmin] (estimated 90% radius based on SNR)
+/- 0.431717147280581 [arcmin] (formal 1-sigma fit error)
SNR: 24.2159178583638
Angular difference between Flight and Ground position is 0.777013 arcmin
Partial Coding Fraction: 0.2929688 [ including projection effects ]
Duration
T90: 598.155999958515 +/- 98.0564572020143
Measured from: -31.7199998497963
to: 566.436000108719 [s; relative to TRIGTIME]
T50: 108.675999999046 +/- 11.5978756302025
Measured from: 64.2880001068115
to: 172.964000105858 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 93.5839999914169
to: 94.5839999914169 [s; relative to TRIGTIME]
Total Fluence
Measured from: -52.2919999957085
to: 710.967999994755 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 8.520388 11.578429 8.474165 1.865983
0.299596 0.288368 0.242561 0.201381 [error]
Peak 0.101245 0.101170 0.107626 0.031837
0.013964 0.013790 0.012156 0.009585 [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 3.16e-06 5.27e-06 6.68e-06 1.69e-05 1.98e-05 3.21e-05 erg/cm2
Error 1.87e-07 1.81e-07 2.54e-07 1.45e-06 6.20e-07 1.59e-06 erg/cm2
Peak flux Power-law 9.86e-01 9.42e-01 6.27e-01 6.49e-01 2.82e+00 3.20e+00 ph/cm2/s
Error 2.16e-01 1.28e-01 1.00e-01 2.11e-01 3.68e-01 4.02e-01 ph/cm2/s
Fluence Cutoff-PL 2.98e-06 5.36e-06 6.82e-06 1.21e-05 1.95e-05 2.73e-05 erg/cm2
Error 2.39e-07 1.99e-07 2.82e-07 3.55e-06 6.87e-07 3.59e-06 erg/cm2
Peak flux Cutoff-PL 9.43e-01 9.59e-01 6.42e-01 5.21e-01 2.79e+00 3.06e+00 ph/cm2/s
Error 2.58e-01 1.42e-01 1.15e-01 3.40e-01 3.81e-01 5.11e-01 ph/cm2/s
Fluence Band 2.87e-06 5.42e-06 6.69e-06 1.50e-05 1.95e-05 3.01e-05 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 9.39e-01 9.73e-01 6.49e-01 4.84e-01 2.81e+00 3.05e+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 1.657 0.057 - - 2.80e-03 8.50e-05 43.230 57
CPL 1.404 0.230 126.3 236.1 3.68e-03 9.05e-04 39.500 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.588 0.219 - - 2.20e-02 2.83e-03 58.500 57
CPL 1.375 0.663 156.3 0.0 2.79e-02 2.54e-02 58.290 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: 524.928000 sec.
T50 in the 50-300 keV band: 116.608000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 763.260 -52.292 710.968
T90 598.156 -31.720 566.436
T50 108.676 64.288 172.964
Peak 1.000 93.584 94.584
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
314.7168 -53.4043 0.0079 40.2 -123.2 25.5492 24.2 TRIG_00644259
------------------------------------------
Foreground time interval of the image:
-52.292 132.298 (delta_t = 184.590 [sec])
133.008 196.228 (delta_t = 63.220 [sec])
197.008 492.809 (delta_t = 295.801 [sec])
Background time interval of the image:
-239.992 -52.292 (delta_t = 187.700 [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
Multiple GTIs in the spectrum
tstart tstop
-52.292000 132.298000
133.008000 196.228000
197.008000 710.968000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65743 ( -0.0567095 0.05678 )
Norm@50keV : 2.79972E-03 ( -8.49689e-05 8.49524e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.23 using 59 PHA bins.
# Reduced chi-squared = 0.7584 for 57 degrees of freedom
# Null hypothesis probability = 9.111333e-01
Photon flux (15-150 keV) in 761.8 sec: 0.366475 ( -0.0125783 0.0126303 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.98216e-05 ( -6.19744e-07 6.20388e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-52.292000 132.298000
133.008000 196.228000
197.008000 710.968000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40406 ( -0.236453 0.224358 )
Epeak [keV] : 126.308 ( -36.5172 435.655 )
Norm@50keV : 3.67905E-03 ( -0.000771872 0.00103911 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.50 using 59 PHA bins.
# Reduced chi-squared = 0.7053 for 56 degrees of freedom
# Null hypothesis probability = 9.536308e-01
Photon flux (15-150 keV) in 761.8 sec: 0.359451 ( -0.013866 0.013937 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.94982e-05 ( -6.88743e-07 6.85696e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-52.292000 132.298000
133.008000 196.228000
197.008000 710.968000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.12387 ( -0.520747 2.917 )
beta : -1.77751 ( 1.77849 0.12194 )
Epeak [keV] : 71.6325 ( -45.3339 205.589 )
Norm@50keV : 5.39344E-03 ( -0.0022644 0.0421835 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.57 using 59 PHA bins.
# Reduced chi-squared = 0.7013 for 55 degrees of freedom
# Null hypothesis probability = 9.546148e-01
Photon flux (15-150 keV) in 761.8 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9452e-05 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.3408 ( )
R^2/D10^2 : 3.54957E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 269.07 using 59 PHA bins.
# Reduced chi-squared = 4.7205 for 57 degrees of freedom
# Null hypothesis probability = 2.852584e-29
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.327e-06 8.380e-08
25- 50 5.382e-06 2.213e-07
50-150 8.705e-06 4.571e-07
15-150 1.541e-05 5.447e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 165.983 (-23.6166 31.0082)
Norm : 1.47759 (-0.0291534 0.0604871)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.23 using 59 PHA bins.
# Reduced chi-squared = 0.7058 for 57 degrees of freedom
# Null hypothesis probability = 9.548375e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.864e-06 1.676e-07
25- 50 5.384e-06 3.497e-07
50-150 1.106e-05 2.663e-06
15-150 1.931e-05 2.811e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.57916 (-0.864181 0.908746)
R1^2/D10^2 : 0.299642 (-0.0940742 0.156853)
kT2 [keV] : 27.0877 (-3.07522 4.29306)
R2^2/D10^2 : 3.52060E-03 (-0.00147477 0.00207437)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.89 using 59 PHA bins.
# Reduced chi-squared = 0.8708 for 55 degrees of freedom
# Null hypothesis probability = 7.404613e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.598e-06 2.941e-07
25- 50 5.540e-06 3.782e-07
50-150 1.113e-05 1.135e-06
15-150 1.926e-05 1.432e-06
Peak spectrum fit
Power-law model
Time interval is from 93.584 sec. to 94.584 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58823 ( -0.217217 0.221648 )
Norm@50keV : 2.20149E-02 ( -0.00283603 0.00281697 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.50 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 57 degrees of freedom
# Null hypothesis probability = 4.199617e-01
Photon flux (15-150 keV) in 1 sec: 2.81880 ( -0.367605 0.369113 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.06186e-07 ( -2.81679e-08 2.83511e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 93.584 sec. to 94.584 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37540 ( -0.900522 0.425107 )
Epeak [keV] : 156.277 ( -156.196 -156.196 )
Norm@50keV : 2.79094E-02 ( -0.00590662 0.0447949 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.29 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 56 degrees of freedom
# Null hypothesis probability = 3.910900e-01
Photon flux (15-150 keV) in 1 sec: 2.79197 ( -0.38171 0.38023 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.04376e-07 ( -2.921e-08 2.9158e-08 ) ergs/cm2
Band function
Time interval is from 93.584 sec. to 94.584 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.37699 ( 1.27837 0.818846 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 157.034 ( -90.4479 -157.034 )
Norm@50keV : 2.78558E-02 ( -0.00851368 0.0448623 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.29 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 55 degrees of freedom
# Null hypothesis probability = 3.552833e-01
Photon flux (15-150 keV) in 1 sec: 2.80959 ( ) 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] : 16.5613 (-2.44529 2.85)
R^2/D10^2 : 0.222016 (-0.0956447 0.167983)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.22 using 59 PHA bins.
# Reduced chi-squared = 1.320 for 57 degrees of freedom
# Null hypothesis probability = 5.329880e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.249e-08 3.148e-09
25- 50 5.409e-08 1.083e-08
50-150 1.050e-07 2.663e-08
15-150 1.716e-07 2.825e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.256 (-88.9356 -199.256)
Norm : 11.4354 (-1.42868 1.71193)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.40 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.236562e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.848e-08 1.609e-08
25- 50 5.478e-08 3.023e-08
50-150 1.201e-07 6.615e-08
15-150 2.034e-07 1.111e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.46629 (-1.23464 1.85148)
R1^2/D10^2 : 17.6042 (-13.6601 66.8348)
kT2 [keV] : 21.7764 (-3.8837 5.83939)
R2^2/D10^2 : 7.45360E-02 (-0.0430222 0.0783651)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.81 using 59 PHA bins.
# Reduced chi-squared = 0.9965 for 55 degrees of freedom
# Null hypothesis probability = 4.818693e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.322e-08 1.698e-08
25- 50 4.758e-08 1.614e-08
50-150 1.226e-07 4.723e-08
15-150 2.034e-07 6.081e-08
Plot creation:
Wed Jun 17 16:03:25 EDT 2015