batgrbproduct Analysis for Trigger=635289
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): Thu Mar 19 00:55:01 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger635289/GCN5_download_cron
======================================================================
Trigger: 00635289 Segment: 000
BAT Trigger Time: 448355106.624 [s; MET]
Trigger Stop: 448355123.008 [s; MET]
UTC: 2015-03-18T07:04:53.299140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 324.970714696083 Dec: -61.4766556855567 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.87
Image Trigger?: NO
Rate S/N Ratio: 10.0995049383621 [ if not an image trigger ]
Image S/N Ratio: 9.87
Flight Position: [ source = BAT ]
RA: 324.970714696083 Dec: -61.4766556855567 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 324.989692872406 Dec: -61.4613817006035 [deg; J2000]
{ 21h 39m 57.5s , -61d 27' 41.0" }
+/- 1.19956574390532 [arcmin] (estimated 90% radius based on SNR)
+/- 0.444563824295129 [arcmin] (formal 1-sigma fit error)
SNR: 23.4545374573844
Angular difference between Flight and Ground position is 1.065675 arcmin
Partial Coding Fraction: 0.4453125 [ including projection effects ]
Duration
T90: 80.12399995327 +/- 12.5736475237014
Measured from: 5.24400007724762
to: 85.3680000305176 [s; relative to TRIGTIME]
T50: 42.6119999885559 +/- 4.12350580265996
Measured from: 22.4800000786781
to: 65.092000067234 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 66.6159999966621
to: 67.6159999966621 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.59600001573563
to: 98.5799999833107 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.507384 1.892916 0.783321 0.201199
0.086392 0.089159 0.077648 0.068369 [error]
Peak 0.051574 0.059269 0.015963 0.005338
0.008927 0.009300 0.007488 0.006822 [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 5.46e-07 7.44e-07 7.47e-07 1.36e-06 2.47e-06 3.39e-06 erg/cm2
Error 5.04e-08 4.58e-08 7.65e-08 2.78e-07 1.76e-07 3.58e-07 erg/cm2
Peak flux Power-law 5.22e-01 3.80e-01 1.83e-01 1.25e-01 1.14e+00 1.21e+00 ph/cm2/s
Error 1.42e-01 7.60e-02 6.07e-02 7.79e-02 2.28e-01 2.43e-01 ph/cm2/s
Fluence Cutoff-PL 5.21e-07 7.91e-07 7.23e-07 5.29e-07 2.33e-06 2.56e-06 erg/cm2
Error 5.65e-08 6.48e-08 9.05e-08 -------- 2.22e-07 5.85e-07 erg/cm2
Peak flux Cutoff-PL 5.00e-01 4.35e-01 1.57e-01 2.19e-02 1.11e+00 1.11e+00 ph/cm2/s
Error 1.53e-01 1.31e-01 1.03e-01 9.75e-02 2.38e-01 1.95e-01 ph/cm2/s
Fluence Band 4.93e-07 8.15e-07 6.90e-07 9.75e-07 2.36e-06 2.98e-06 erg/cm2
Error 4.53e-08 6.39e-08 8.58e-08 -------- 1.87e-07 3.99e-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 1.994 0.117 - - 2.55e-03 1.90e-04 68.910 57
CPL 1.457 0.565 41.8 0.0 5.22e-03 0.00e+00 65.760 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.053 0.363 - - 7.44e-03 1.90e-03 57.130 57
CPL 0.900 3.175 34.5 0.0 4.01e-02 0.00e+00 56.150 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: 68.480000 sec.
T50 in the 50-300 keV band: 47.424000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 105.176 -6.596 98.580
T90 80.124 5.244 85.368
T50 42.612 22.480 65.092
Peak 1.000 66.616 67.616
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
324.9897 -61.4614 0.0082 33.5 148.4 4.1929 23.5 TRIG_00635289
------------------------------------------
Foreground time interval of the image:
-6.596 75.577 (delta_t = 82.173 [sec])
Background time interval of the image:
-239.624 -6.596 (delta_t = 233.028 [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 -6.596 sec. to 98.580 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99446 ( -0.115174 0.118112 )
Norm@50keV : 2.55176E-03 ( -0.000190794 0.000188478 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.91 using 59 PHA bins.
# Reduced chi-squared = 1.209 for 57 degrees of freedom
# Null hypothesis probability = 1.340641e-01
Photon flux (15-150 keV) in 105.2 sec: 0.381791 ( -0.0239059 0.0239266 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.47485e-06 ( -1.75247e-07 1.7703e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.596 sec. to 98.580 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45657 ( -0.613631 0.516343 )
Epeak [keV] : 41.8189 ( )
Norm@50keV : 5.22170E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.76 using 59 PHA bins.
# Reduced chi-squared = 1.174 for 56 degrees of freedom
# Null hypothesis probability = 1.746892e-01
Photon flux (15-150 keV) in 105.2 sec: 0.372564 ( -0.025564 0.025447 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.32985e-06 ( -2.1991e-07 2.23918e-07 ) ergs/cm2
Band function
Time interval is from -6.596 sec. to 98.580 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.12032 ( -1.37273 -0.105581 )
beta : -2.25785 ( -0.393827 0.217079 )
Epeak [keV] : 29.1695 ( -7.22466 9.33513 )
Norm@50keV : 0.357788 ( -0.356437 155.195 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.27 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 55 degrees of freedom
# Null hypothesis probability = 3.225901e-01
Photon flux (15-150 keV) in 105.2 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35629e-06 ( -2.35555e-06 -1.85594e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.72103 (-0.671494 0.72941)
R^2/D10^2 : 0.195195 (-0.048296 0.0634677)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 103.12 using 59 PHA bins.
# Reduced chi-squared = 1.8091 for 57 degrees of freedom
# Null hypothesis probability = 1.783927e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.912e-07 4.255e-08
25- 50 9.339e-07 6.764e-08
50-150 4.488e-07 7.753e-08
15-150 1.774e-06 1.215e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 65.8839 (-11.9609 16.0028)
Norm : 1.91231 (-0.199356 0.227836)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.72 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 57 degrees of freedom
# Null hypothesis probability = 2.005154e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.125e-07 4.655e-08
25- 50 8.018e-07 5.092e-08
50-150 9.836e-07 1.553e-07
15-150 2.298e-06 1.788e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.71974 (-1.03491 0.958323)
R1^2/D10^2 : 0.413019 (-0.138064 0.162403)
kT2 [keV] : 38.0353 (-15.14 83.228)
R2^2/D10^2 : 7.75990E-04 (-0.000696963 0.00351826)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.40 using 59 PHA bins.
# Reduced chi-squared = 1.062 for 55 degrees of freedom
# Null hypothesis probability = 3.514402e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.712e-07 6.554e-08
25- 50 8.546e-07 1.142e-07
50-150 1.126e-06 5.065e-07
15-150 2.452e-06 6.002e-07
Peak spectrum fit
Power-law model
Time interval is from 66.616 sec. to 67.616 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.05260 ( -0.347709 0.379113 )
Norm@50keV : 7.44195E-03 ( -0.00192945 0.00186909 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.13 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 57 degrees of freedom
# Null hypothesis probability = 4.700949e-01
Photon flux (15-150 keV) in 1 sec: 1.14416 ( -0.228037 0.228086 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.88615e-08 ( -1.61047e-08 1.67477e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 66.616 sec. to 67.616 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.899859 ( -5.14579 1.2033 )
Epeak [keV] : 34.4769 ( )
Norm@50keV : 4.01070E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.15 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 56 degrees of freedom
# Null hypothesis probability = 4.693895e-01
Photon flux (15-150 keV) in 1 sec: 1.11032 ( -0.240251 0.23586 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.97734e-08 ( -1.88334e-08 2.24334e-08 ) ergs/cm2
Band function
Time interval is from 66.616 sec. to 67.616 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.92002 ( -6.6354 -4.92002 )
beta : -2.47691 ( -1.22419 0.526419 )
Epeak [keV] : 24.9652 ( -7.41549 6.01299 )
Norm@50keV : 1235.78 ( -239.951 12797.9 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.65 using 59 PHA bins.
# Reduced chi-squared = 0.9755 for 55 degrees of freedom
# Null hypothesis probability = 5.261954e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.46051e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.24657 (-1.45785 1.86163)
R^2/D10^2 : 1.17107 (-0.658701 1.37686)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.13 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 57 degrees of freedom
# Null hypothesis probability = 4.701448e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.472e-08 5.719e-09
25- 50 2.713e-08 1.024e-08
50-150 7.865e-09 4.452e-09
15-150 4.971e-08 1.733e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 53.2224 (-21.9557 55.7356)
Norm : 6.36367 (-1.89954 2.86608)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.19 using 59 PHA bins.
# Reduced chi-squared = 0.9859 for 57 degrees of freedom
# Null hypothesis probability = 5.052627e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.577e-08 4.345e-09
25- 50 2.315e-08 7.000e-09
50-150 2.381e-08 1.345e-08
15-150 6.273e-08 1.995e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.20203 (-1.78022 1.97259)
R1^2/D10^2 : 1.80504 ( )
kT2 [keV] : 41.9300 (-28.1738 -41.818)
R2^2/D10^2 : 1.66140E-03 (-0.00164865 0.081731)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.71 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.68 using 59 PHA bins.
# Reduced chi-squared = 0.9584 for 55 degrees of freedom
# Reduced chi-squared = 0.9579 for 55 degrees of freedom
# Null hypothesis probability = 5.625136e-01
# Null hypothesis probability = 5.636171e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.592e-08 8.943e-09
25- 50 2.473e-08 1.402e-08
50-150 2.911e-08 1.735e-08
15-150 6.976e-08 3.554e-08
Plot creation:
Thu Mar 19 00:58:54 EDT 2015