batgrbproduct Analysis for Trigger=636005
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 Mar 24 14:05:51 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger636005/test
======================================================================
Trigger: 00636005 Segment: 000
BAT Trigger Time: 448823134.848 [s; MET]
Trigger Stop: 448823147.008 [s; MET]
UTC: 2015-03-23T17:05:21.499240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 192.612689304227 Dec: 50.1982572072614 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.46
Image Trigger?: NO
Rate S/N Ratio: 10.7238052947636 [ if not an image trigger ]
Image S/N Ratio: 7.46
Flight Position: [ source = BAT ]
RA: 192.612689304227 Dec: 50.1982572072614 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 192.625402102897 Dec: 50.1653602087281 [deg; J2000]
{ 12h 50m 30.1s , +50d 09' 55.3" }
+/- 2.40443667011438 [arcmin] (estimated 90% radius based on SNR)
+/- 1.34386764162647 [arcmin] (formal 1-sigma fit error)
SNR: 8.68587559047942
Angular difference between Flight and Ground position is 2.033357 arcmin
Partial Coding Fraction: 0.2695312 [ including projection effects ]
Duration
T90: 159.392000079155 +/- 53.9513813778746
Measured from: -20.5680000185966
to: 138.824000060558 [s; relative to TRIGTIME]
T50: 31.7280000448227 +/- 99.6905667019443
Measured from: -12.3759999871254
to: 19.3520000576973 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.98000001907349
to: 6.98000001907349 [s; relative to TRIGTIME]
Total Fluence
Measured from: -22.9359999895096
to: 166.34399998188 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.858841 0.850580 0.359961 0.179561
0.131624 0.132549 0.119103 0.112420 [error]
Peak 0.048030 0.040348 0.023959 0.007304
0.012490 0.012717 0.011281 0.009594 [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 3.19e-07 4.11e-07 3.88e-07 6.45e-07 1.33e-06 1.76e-06 erg/cm2
Error 7.35e-08 6.91e-08 1.15e-07 3.76e-07 2.65e-07 5.08e-07 erg/cm2
Peak flux Power-law 5.25e-01 3.67e-01 1.69e-01 1.08e-01 1.11e+00 1.17e+00 ph/cm2/s
Error 2.21e-01 1.14e-01 8.92e-02 1.26e-01 3.42e-01 3.61e-01 ph/cm2/s
Fluence Cutoff-PL 2.78e-07 4.81e-07 3.55e-07 9.00e-08 1.19e-06 1.20e-06 erg/cm2
Error 9.58e-08 1.04e-07 1.39e-07 -------- 2.86e-07 5.72e-07 erg/cm2
Peak flux Cutoff-PL 4.73e-01 4.20e-01 1.59e-01 2.41e-02 1.07e+00 1.08e+00 ph/cm2/s
Error 3.68e-01 1.74e-01 1.08e-01 1.19e-01 3.63e-01 3.97e-01 ph/cm2/s
Fluence Band 2.80e-07 4.72e-07 3.65e-07 2.24e-07 1.23e-06 1.34e-06 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 2.085 0.320 - - 7.60e-04 1.64e-04 62.120 57
CPL 0.604 2.003 38.8 0.0 5.44e-03 0.00e+00 60.390 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.122 0.612 - - 7.00e-03 2.87e-03 44.260 57
CPL 0.892 3.451 35.9 -2.0 3.75e-02 3.17e+01 43.900 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 189.280 -22.936 166.344
T90 159.392 -20.568 138.824
T50 31.728 -12.376 19.352
Peak 1.000 5.980 6.980
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
192.6254 +50.1654 0.0221 45.5 16.2 2.3999 8.7 TRIG_00636005
------------------------------------------
Foreground time interval of the image:
-22.936 58.853 (delta_t = 81.789 [sec])
Background time interval of the image:
-122.947 -22.936 (delta_t = 100.011 [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 -22.936 sec. to 166.344 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08549 ( -0.303451 0.336842 )
Norm@50keV : 7.60061E-04 ( -0.000167365 0.000161087 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.12 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 57 degrees of freedom
# Null hypothesis probability = 2.989265e-01
Photon flux (15-150 keV) in 189.3 sec: 0.118728 ( -0.0197131 0.019723 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33498e-06 ( -2.60624e-07 2.68698e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -22.936 sec. to 166.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.604134 ( -2.47876 1.52726 )
Epeak [keV] : 38.7671 ( )
Norm@50keV : 5.43692E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.39 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 56 degrees of freedom
# Null hypothesis probability = 3.202767e-01
Photon flux (15-150 keV) in 189.3 sec: 0.112382 ( -0.0213641 0.021373 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18734e-06 ( -2.50968e-07 3.20131e-07 ) ergs/cm2
Band function
Time interval is from -22.936 sec. to 166.344 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.407852 ( 1.28755 3.32677 )
beta : -3.36494 ( 3.25273 1.35862 )
Epeak [keV] : 38.9066 ( -38.3122 18.893 )
Norm@50keV : 7.03313E-03 ( -0.00414122 0.111843 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.03 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 55 degrees of freedom
# Null hypothesis probability = 2.985321e-01
Photon flux (15-150 keV) in 189.3 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23442e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.4224 (-1.56845 1.77788)
R^2/D10^2 : 4.84112E-02 (-0.0222558 0.0419259)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.25 using 59 PHA bins.
# Reduced chi-squared = 1.092 for 57 degrees of freedom
# Null hypothesis probability = 2.948944e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.054e-07 7.083e-08
25- 50 5.407e-07 1.461e-07
50-150 3.177e-07 1.292e-07
15-150 1.064e-06 2.801e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.1667 (-20.6239 42.0503)
Norm : 0.638286 (-0.159386 0.212396)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.75 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 57 degrees of freedom
# Null hypothesis probability = 3.423064e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.012e-07 6.872e-08
25- 50 4.515e-07 1.120e-07
50-150 4.931e-07 2.268e-07
15-150 1.246e-06 3.546e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.36843 (-1.90897 2.14367)
R1^2/D10^2 : 18.8481 (-18.5148 -18.9414)
kT2 [keV] : 11.5984 (-1.94991 2.63689)
R2^2/D10^2 : 2.93811E-02 (-0.0171288 0.0326793)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.59 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.152840e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.886e-07 1.360e-07
25- 50 4.841e-07 2.281e-07
50-150 3.765e-07 2.364e-07
15-150 1.149e-06 4.771e-07
Peak spectrum fit
Power-law model
Time interval is from 5.980 sec. to 6.980 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.12168 ( -0.547466 0.676589 )
Norm@50keV : 6.99588E-03 ( -0.00296601 0.00276613 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.26 using 59 PHA bins.
# Reduced chi-squared = 0.7764 for 57 degrees of freedom
# Null hypothesis probability = 8.911485e-01
Photon flux (15-150 keV) in 1 sec: 1.11256 ( -0.342298 0.342427 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.51423e-08 ( -2.33803e-08 2.45955e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.980 sec. to 6.980 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.892374 ( -5.66896 1.233 )
Epeak [keV] : 35.9344 ( -31.9552 -35.9592 )
Norm@50keV : 3.74781E-02 ( -0.0381252 63.3085 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.90 using 59 PHA bins.
# Reduced chi-squared = 0.7839 for 56 degrees of freedom
# Null hypothesis probability = 8.797375e-01
Photon flux (15-150 keV) in 1 sec: 1.07240 ( -0.365638 0.36085 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.87737e-08 ( -2.19133e-08 2.92315e-08 ) ergs/cm2
Band function
Time interval is from 5.980 sec. to 6.980 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.18504 ( 1.34764 1.34764 )
beta : -2.83418 ( 2.66351 1.0519 )
Epeak [keV] : 33.6635 ( -33.6965 -33.6965 )
Norm@50keV : 2.58663E-02 ( -0.0275558 3.83487e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.78 using 59 PHA bins.
# Reduced chi-squared = 0.7960 for 55 degrees of freedom
# Null hypothesis probability = 8.616737e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.0762e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.80613 (-2.71237 3.47473)
R^2/D10^2 : 0.574896 (-0.57491 1.42406)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.57 using 59 PHA bins.
# Reduced chi-squared = 0.7820 for 57 degrees of freedom
# Null hypothesis probability = 8.844014e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.118e-08 7.130e-09
25- 50 2.703e-08 1.710e-08
50-150 1.333e-08 1.000e-08
15-150 5.154e-08 3.292e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 53.2713 (-29.0037 121.687)
Norm : 6.15598 (-2.56312 4.91887)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.94 using 59 PHA bins.
# Reduced chi-squared = 0.7708 for 57 degrees of freedom
# Null hypothesis probability = 8.976301e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.526e-08 8.779e-09
25- 50 2.240e-08 1.301e-08
50-150 2.306e-08 1.767e-08
15-150 6.072e-08 3.971e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.27198 (-2.19001 11.8038)
R1^2/D10^2 : 217.127 ( )
kT2 [keV] : 10.9512 (-3.24657 -10.9525)
R2^2/D10^2 : 0.342152 (-0.341129 1.05481)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.14 using 59 PHA bins.
#Fit statistic : Chi-Squared = 43.12 using 59 PHA bins.
# Reduced chi-squared = 0.7843 for 55 degrees of freedom
# Reduced chi-squared = 0.7839 for 55 degrees of freedom
# Null hypothesis probability = 8.768664e-01
# Null hypothesis probability = 8.773677e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.425e-08 6.895e-09
25- 50 2.463e-08 1.442e-08
50-150 1.566e-08 1.088e-08
15-150 5.454e-08 3.250e-08
Plot creation:
Tue Mar 24 16:25:38 EDT 2015