batgrbproduct Analysis for Trigger=643949
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): Tue Jun 16 12:19:27 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger643949/GCN5_download_cron
======================================================================
Trigger: 00643949 Segment: 000
BAT Trigger Time: 456085912 [s; MET]
Trigger Stop: 456086024 [s; MET]
UTC: 2015-06-15T18:31:38.277460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 306.020483155155 Dec: 33.8498788806203 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.73
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.73
Flight Position: [ source = BAT ]
RA: 306.020483155155 Dec: 33.8498788806203 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 306.016375638005 Dec: 33.8565063459056 [deg; J2000]
{ 20h 24m 03.9s , +33d 51' 23.4" }
+/- 1.83803989783996 [arcmin] (estimated 90% radius based on SNR)
+/- 1.06233930249378 [arcmin] (formal 1-sigma fit error)
SNR: 12.74877551251
Angular difference between Flight and Ground position is 0.447229 arcmin
Partial Coding Fraction: 0.6015625 [ including projection effects ]
Duration
T90: 1025.97199994326 +/- 25.8123275845483
Measured from: -85.7999998927116
to: 940.172000050545 [s; relative to TRIGTIME]
T50: 876.243999958038 +/- 48.0687827109929
Measured from: -23.2999998927116
to: 852.944000065327 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 58.1520000100136
to: 59.1520000100136 [s; relative to TRIGTIME]
Total Fluence
Measured from: -100.055999994278
to: 953.763999998569 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.385333 6.761879 4.633903 1.132075
0.205458 0.210969 0.183646 0.164508 [error]
Peak 0.027247 0.019306 0.029501 0.008406
0.008084 0.008401 0.006958 0.006443 [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 1.45e-06 2.63e-06 3.66e-06 1.06e-05 1.05e-05 1.84e-05 erg/cm2
Error 1.03e-07 1.10e-07 1.86e-07 1.20e-06 4.46e-07 1.32e-06 erg/cm2
Peak flux Power-law 1.98e-01 2.09e-01 1.56e-01 1.88e-01 6.35e-01 7.50e-01 ph/cm2/s
Error 9.94e-02 6.58e-02 5.66e-02 1.44e-01 1.87e-01 2.23e-01 ph/cm2/s
Fluence Cutoff-PL 1.39e-06 2.69e-06 3.71e-06 7.15e-06 1.03e-05 1.49e-05 erg/cm2
Error 1.23e-07 1.29e-07 1.97e-07 3.07e-06 5.17e-07 2.77e-06 erg/cm2
Peak flux Cutoff-PL 1.80e-01 2.18e-01 1.63e-01 1.10e-01 6.21e-01 6.71e-01 ph/cm2/s
Error 1.50e-01 7.75e-02 6.57e-02 1.77e-01 1.96e-01 2.65e-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 1.522 0.071 - - 1.06e-03 4.12e-05 68.530 57
CPL 1.267 0.283 143.2 -45.9 1.42e-03 4.52e-04 65.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.424 0.519 - - 5.18e-03 1.53e-03 48.370 57
CPL 0.978 2.475 116.0 0.0 8.63e-03 0.00e+00 48.200 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: 638.208000 sec.
T50 in the 50-300 keV band: 310.656000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1053.820 -100.056 953.764
T90 1025.970 -85.800 940.172
T50 876.244 -23.300 852.944
Peak 1.000 58.152 59.152
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
306.0164 +33.8565 0.0150 21.0 107.1 2.7429 12.7 TRIG_00643949
------------------------------------------
Foreground time interval of the image:
-16.699 120.401 (delta_t = 137.100 [sec])
Background time interval of the image:
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 -100.056 sec. to 953.764 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52216 ( -0.0711949 0.0712238 )
Norm@50keV : 1.05582E-03 ( -4.12153e-05 4.11636e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.53 using 59 PHA bins.
# Reduced chi-squared = 1.202 for 57 degrees of freedom
# Null hypothesis probability = 1.409705e-01
Photon flux (15-150 keV) in 1054 sec: 0.132609 ( -0.00535265 0.0053624 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05198e-05 ( -4.45202e-07 4.4691e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -100.056 sec. to 953.764 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26670 ( -0.293101 0.273293 )
Epeak [keV] : 143.187 ( -51.3879 -143.189 )
Norm@50keV : 1.41831E-03 ( -0.000348815 0.000555875 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.99 using 59 PHA bins.
# Reduced chi-squared = 1.178 for 56 degrees of freedom
# Null hypothesis probability = 1.696467e-01
Photon flux (15-150 keV) in 1054 sec: 0.130575 ( -0.005758 0.005759 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02807e-05 ( -5.19127e-07 5.15764e-07 ) ergs/cm2
Band function
Time interval is from -100.056 sec. to 953.764 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.42984 ( -4.41486 -3.85908 )
beta : -1.63999 ( -0.104248 0.095798 )
Epeak [keV] : 30.6944 ( -3.92138 21.6634 )
Norm@50keV : 0.652537 ( -0.652226 23.5888 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.53 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 55 degrees of freedom
# Null hypothesis probability = 3.816454e-01
Photon flux (15-150 keV) in 1054 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] : 14.6823 ( )
R^2/D10^2 : 1.56233E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 201.37 using 59 PHA bins.
# Reduced chi-squared = 3.5328 for 57 degrees of freedom
# Null hypothesis probability = 5.404778e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.456e-07 5.818e-08
25- 50 2.904e-06 1.339e-07
50-150 4.219e-06 3.557e-07
15-150 7.869e-06 3.620e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 0.540208 (-0.0207216 0.0207138)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.44 using 59 PHA bins.
# Reduced chi-squared = 1.166 for 57 degrees of freedom
# Null hypothesis probability = 1.837527e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.418e-06 5.744e-08
25- 50 2.728e-06 1.086e-07
50-150 5.983e-06 2.498e-07
15-150 1.013e-05 4.053e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.14399 (-0.987613 1.05341)
R1^2/D10^2 : 8.83231E-02 (-0.0277989 0.0450781)
kT2 [keV] : 31.9104 (-5.65428 9.85197)
R2^2/D10^2 : 7.97663E-04 (-0.000455405 0.000775124)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.60 using 59 PHA bins.
# Reduced chi-squared = 1.102 for 55 degrees of freedom
# Null hypothesis probability = 2.809877e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.260e-06 1.401e-07
25- 50 2.856e-06 2.735e-07
50-150 6.272e-06 1.474e-06
15-150 1.039e-05 1.541e-06
Peak spectrum fit
Power-law model
Time interval is from 58.152 sec. to 59.152 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42437 ( -0.517485 0.51973 )
Norm@50keV : 5.18116E-03 ( -0.0015422 0.0015195 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.37 using 59 PHA bins.
# Reduced chi-squared = 0.8486 for 57 degrees of freedom
# Null hypothesis probability = 7.850932e-01
Photon flux (15-150 keV) in 1 sec: 0.634562 ( -0.186639 0.18738 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.98211e-08 ( -1.60487e-08 1.64803e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 58.152 sec. to 59.152 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.977816 ( -3.49565 1.45522 )
Epeak [keV] : 116.049 ( -142.977 -142.977 )
Norm@50keV : 8.63287E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.20 using 59 PHA bins.
# Reduced chi-squared = 0.8608 for 56 degrees of freedom
# Null hypothesis probability = 7.611774e-01
Photon flux (15-150 keV) in 1 sec: 0.621282 ( -0.197678 0.193877 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.82061e-08 ( -1.66962e-08 1.75799e-08 ) ergs/cm2
Band function
Time interval is from 58.152 sec. to 59.152 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.874696 ( 0.874287 3.65383 )
beta : -2.22124 ( 2.04132 11.1612 )
Epeak [keV] : 101.728 ( -101.904 -101.904 )
Norm@50keV : 9.86915E-03 ( -0.00510008 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.19 using 59 PHA bins.
# Reduced chi-squared = 0.8763 for 55 degrees of freedom
# Null hypothesis probability = 7.302307e-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] : 16.9454 (-4.82061 7.35424)
R^2/D10^2 : 4.89364E-02 (-0.0489364 0.10659)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.85 using 59 PHA bins.
# Reduced chi-squared = 0.8745 for 57 degrees of freedom
# Null hypothesis probability = 7.379233e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.864e-09 1.798e-09
25- 50 1.264e-08 7.850e-09
50-150 2.589e-08 1.712e-08
15-150 4.140e-08 2.580e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-126.341 -199.363)
Norm : 2.61903 (-0.756601 0.756649)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.44 using 59 PHA bins.
# Reduced chi-squared = 0.8498 for 57 degrees of freedom
# Null hypothesis probability = 7.829882e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.522e-09 4.169e-09
25- 50 1.254e-08 7.580e-09
50-150 2.751e-08 1.675e-08
15-150 4.658e-08 2.876e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.82932 (-3.67154 13.5731)
R1^2/D10^2 : 5.88312 (-5.87766 -5.88657)
kT2 [keV] : 20.0499 (-6.26283 177.859)
R2^2/D10^2 : 2.51286E-02 (-0.0250931 0.0564859)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.13 using 59 PHA bins.
# Reduced chi-squared = 0.8568 for 55 degrees of freedom
# Null hypothesis probability = 7.659469e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.260e-09 3.683e-09
25- 50 1.108e-08 6.155e-09
50-150 2.895e-08 1.829e-08
15-150 4.629e-08 2.634e-08
Plot creation:
Tue Jun 16 12:23:53 EDT 2015