batgrbproduct Analysis for Trigger=639433
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 Apr 30 23:05:35 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger639433/GCN5_download_cron
======================================================================
Trigger: 00639433 Segment: 000
BAT Trigger Time: 452046088.768 [s; MET]
Trigger Stop: 452046090.816 [s; MET]
UTC: 2015-04-30T00:21:15.254160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 326.490552682698 Dec: -27.9275457785092 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.21
Image Trigger?: NO
Rate S/N Ratio: 53.619026473818 [ if not an image trigger ]
Image S/N Ratio: 7.21
Flight Position: [ source = BAT ]
RA: 326.490552682698 Dec: -27.9275457785092 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 326.48119941059 Dec: -27.9188700829412 [deg; J2000]
{ 21h 45m 55.5s , -27d 55' 07.9" }
+/- 1.57142597664525 [arcmin] (estimated 90% radius based on SNR)
+/- 0.69329200422479 [arcmin] (formal 1-sigma fit error)
SNR: 15.9477156235546
Angular difference between Flight and Ground position is 0.718916 arcmin
Partial Coding Fraction: 0.05761719 [ including projection effects ]
Duration
T90: 107.120000004768 +/- 6.6842669033943
Measured from: -8.2639998793602
to: 98.8560001254082 [s; relative to TRIGTIME]
T50: 46.5759999752045 +/- 11.7685411022217
Measured from: 0.0400001406669617
to: 46.6160001158714 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.972000002861023
to: 1.97200000286102 [s; relative to TRIGTIME]
Total Fluence
Measured from: -11.6399999856949
to: 108.695999979973 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.066979 3.334042 3.229784 0.968500
0.207240 0.223552 0.205657 0.171293 [error]
Peak 0.147238 0.161853 0.256421 0.068986
0.030225 0.039244 0.041156 0.029853 [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 8.55e-07 1.64e-06 2.44e-06 7.80e-06 6.88e-06 1.27e-05 erg/cm2
Error 1.08e-07 1.26e-07 2.00e-07 1.40e-06 5.00e-07 1.53e-06 erg/cm2
Peak flux Power-law 1.29e+00 1.56e+00 1.38e+00 2.10e+00 4.96e+00 6.33e+00 ph/cm2/s
Error 4.78e-01 3.64e-01 2.97e-01 9.35e-01 1.00e+00 1.28e+00 ph/cm2/s
Fluence Cutoff-PL 7.92e-07 1.69e-06 2.53e-06 4.92e-06 6.77e-06 9.94e-06 erg/cm2
Error 1.34e-07 1.45e-07 2.36e-07 2.43e-06 5.25e-07 2.45e-06 erg/cm2
Peak flux Cutoff-PL 1.20e+00 1.59e+00 1.44e+00 1.70e+00 4.93e+00 5.96e+00 ph/cm2/s
Error 5.93e-01 3.89e-01 3.90e-01 1.54e+00 1.01e+00 1.62e+00 ph/cm2/s
Fluence Band 6.19e-07 1.31e-06 1.72e-06 3.69e-06 4.77e-06 7.34e-06 erg/cm2
Error -------- -------- -------- -------- 4.89e-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 1.428 0.117 - - 5.95e-03 4.06e-04 48.130 57
CPL 1.069 0.463 141.4 -43.9 8.79e-03 4.68e-03 46.400 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.181 0.326 - - 4.24e-02 8.24e-03 54.750 57
CPL 1.045 0.391 422.8 0.0 4.86e-02 1.17e-01 54.680 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: 105.984000 sec.
T50 in the 50-300 keV band: 23.680000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 120.336 -11.640 108.696
T90 107.120 -8.264 98.856
T50 46.576 0.040 46.616
Peak 1.000 0.972 1.972
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
326.4812 -27.9189 0.0121 48.9 38.1 7.2202 15.9 TRIG_00639433
------------------------------------------
Foreground time interval of the image:
-11.640 30.833 (delta_t = 42.473 [sec])
Background time interval of the image:
-239.768 -11.640 (delta_t = 228.128 [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 -11.640 sec. to 108.696 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42849 ( -0.117212 0.117106 )
Norm@50keV : 5.95291E-03 ( -0.00040646 0.000406397 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.13 using 59 PHA bins.
# Reduced chi-squared = 0.8444 for 57 degrees of freedom
# Null hypothesis probability = 7.924050e-01
Photon flux (15-150 keV) in 120.3 sec: 0.729782 ( -0.0530949 0.0532465 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.88073e-06 ( -4.99104e-07 5.00312e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -11.640 sec. to 108.696 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06873 ( -0.515599 0.409632 )
Epeak [keV] : 141.418 ( -53.6521 -141.418 )
Norm@50keV : 8.78963E-03 ( -0.00305387 0.00630273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.40 using 59 PHA bins.
# Reduced chi-squared = 0.8287 for 56 degrees of freedom
# Null hypothesis probability = 8.160378e-01
Photon flux (15-150 keV) in 120.3 sec: 0.717932 ( -0.055188 0.055328 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.77461e-06 ( -5.26794e-07 5.23353e-07 ) ergs/cm2
Band function
Time interval is from -11.640 sec. to 108.696 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.924659 ( 0.923422 0.923422 )
beta : -1.67307 ( 1.67221 0.310356 )
Epeak [keV] : 106.671 ( -106.103 635.176 )
Norm@50keV : 1.05916E-02 ( -0.00439568 0.0557463 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.21 using 59 PHA bins.
# Reduced chi-squared = 0.8403 for 55 degrees of freedom
# Null hypothesis probability = 7.946040e-01
Photon flux (15-150 keV) in 120.3 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.77201e-06 ( -4.77117e-06 -4.86349e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.1820 (-1.40119 1.56289)
R^2/D10^2 : 5.30076E-02 (-0.013931 0.0184528)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.87 using 59 PHA bins.
# Reduced chi-squared = 1.542 for 57 degrees of freedom
# Null hypothesis probability = 5.385025e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.823e-07 5.251e-08
25- 50 1.706e-06 1.738e-07
50-150 3.607e-06 4.253e-07
15-150 5.695e-06 4.373e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.04475 (-0.208263 0.208241)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.79 using 59 PHA bins.
# Reduced chi-squared = 0.8910 for 57 degrees of freedom
# Null hypothesis probability = 7.058377e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.123e-07 8.301e-08
25- 50 1.755e-06 1.486e-07
50-150 3.849e-06 7.278e-07
15-150 6.516e-06 8.776e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.21849 (-1.93627 2.73516)
R1^2/D10^2 : 0.600273 (-0.36293 1.08469)
kT2 [keV] : 26.4308 (-4.94724 11.7999)
R2^2/D10^2 : 9.67005E-03 (-0.00688536 0.00833035)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.38 using 59 PHA bins.
# Reduced chi-squared = 0.8796 for 55 degrees of freedom
# Null hypothesis probability = 7.239306e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.603e-07 3.609e-07
25- 50 1.704e-06 4.998e-07
50-150 4.263e-06 1.160e-06
15-150 6.728e-06 1.912e-06
Peak spectrum fit
Power-law model
Time interval is from 0.972 sec. to 1.972 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18055 ( -0.326478 0.325374 )
Norm@50keV : 4.23872E-02 ( -0.00824745 0.00823451 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.75 using 59 PHA bins.
# Reduced chi-squared = 0.9606 for 57 degrees of freedom
# Null hypothesis probability = 5.597992e-01
Photon flux (15-150 keV) in 1 sec: 4.96220 ( -1.00159 1.00511 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.32435e-07 ( -8.99937e-08 9.02038e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.972 sec. to 1.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04482 ( -1.8173 -1.03482 )
Epeak [keV] : 422.846 ( -379.615 -379.615 )
Norm@50keV : 4.85623E-02 ( -0.0147495 0.21915 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.68 using 59 PHA bins.
# Reduced chi-squared = 0.9764 for 56 degrees of freedom
# Null hypothesis probability = 5.249980e-01
Photon flux (15-150 keV) in 1 sec: 4.93175 ( -1.0141 1.01574 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.32613e-07 ( -9.0695e-08 9.0639e-08 ) ergs/cm2
Band function
Time interval is from 0.972 sec. to 1.972 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.919355 ( 0.931197 0.931197 )
beta : -6.99631 ( 6.84788 6.84788 )
Epeak [keV] : 243.511 ( -139.408 -243.511 )
Norm@50keV : 5.54751E-02 ( -0.0107379 0.123778 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.66 using 59 PHA bins.
# Reduced chi-squared = 0.9939 for 55 degrees of freedom
# Null hypothesis probability = 4.874781e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12334e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.4050 (-4.29312 5.92306)
R^2/D10^2 : 0.194780 (-0.108168 0.210492)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.90 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 57 degrees of freedom
# Null hypothesis probability = 4.057263e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.672e-08 6.493e-09
25- 50 8.697e-08 3.404e-08
50-150 2.974e-07 1.076e-07
15-150 4.011e-07 1.277e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 20.6110 (-4.11421 4.11392)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.86 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 57 degrees of freedom
# Null hypothesis probability = 4.071375e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.135e-08 3.003e-08
25- 50 9.877e-08 5.680e-08
50-150 2.166e-07 1.254e-07
15-150 3.668e-07 2.141e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.47407 (-1.62512 4.03768)
R1^2/D10^2 : 79.5754 (-52.0036 4482.54)
kT2 [keV] : 25.0390 (-5.66671 9.85455)
R2^2/D10^2 : 0.108485 (-0.0718969 0.148937)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.53 using 59 PHA bins.
# Reduced chi-squared = 0.9551 for 55 degrees of freedom
# Null hypothesis probability = 5.695948e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.682e-08 2.533e-08
25- 50 7.532e-08 3.793e-08
50-150 3.116e-07 1.826e-07
15-150 4.337e-07 1.707e-07
Plot creation:
Thu Apr 30 23:10:43 EDT 2015