batgrbproduct Analysis for Trigger=634200
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 10 20:21:44 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger634200/GCN5_download_cron
======================================================================
Trigger: 00634200 Segment: 000
BAT Trigger Time: 447635000 [s; MET]
Trigger Stop: 447635064 [s; MET]
UTC: 2015-03-09T23:03:06.711860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 276.987461493266 Dec: 86.4295417431885 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 13
Flight Position: [ source = BAT ]
RA: 276.987461493266 Dec: 86.4295417431885 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 277.005960747443 Dec: 86.4155816577206 [deg; J2000]
{ 18h 28m 01.4s , +86d 24' 56.1" }
+/- 1.85010091677195 [arcmin] (estimated 90% radius based on SNR)
+/- 0.738597157794 [arcmin] (formal 1-sigma fit error)
SNR: 12.6302119759283
Angular difference between Flight and Ground position is 0.840464 arcmin
Partial Coding Fraction: 0.5 [ including projection effects ]
Duration
T90: 242.539999961853 +/- 6.34284606090274
Measured from: -191.831999897957
to: 50.7080000638962 [s; relative to TRIGTIME]
T50: 25.2919999361038 +/- 2.95526648428421
Measured from: -182.003999888897
to: -156.711999952793 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -177.487999975681
to: -176.487999975681 [s; relative to TRIGTIME]
Total Fluence
Measured from: -197.319999992847
to: 119.072000026703 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 6.062385 9.697076 8.246133 2.090323
0.131905 0.140550 0.127077 0.115236 [error]
Peak 0.198367 0.398234 0.396642 0.130781
0.010631 0.013225 0.013777 0.010155 [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 2.02e-06 4.03e-06 6.27e-06 2.15e-05 1.75e-05 3.38e-05 erg/cm2
Error 8.57e-08 9.87e-08 1.41e-07 1.15e-06 3.55e-07 1.20e-06 erg/cm2
Peak flux Power-law 2.04e+00 2.73e+00 2.68e+00 4.73e+00 8.99e+00 1.22e+01 ph/cm2/s
Error 1.52e-01 1.23e-01 1.09e-01 4.17e-01 3.37e-01 4.98e-01 ph/cm2/s
Fluence Cutoff-PL 1.85e-06 4.08e-06 6.45e-06 1.47e-05 1.72e-05 2.71e-05 erg/cm2
Error 1.14e-07 1.04e-07 1.67e-07 2.67e-06 3.92e-07 2.68e-06 erg/cm2
Peak flux Cutoff-PL 1.90e+00 2.77e+00 2.77e+00 3.58e+00 8.90e+00 1.10e+01 ph/cm2/s
Error 1.92e-01 1.32e-01 1.36e-01 9.07e-01 3.47e-01 9.64e-01 ph/cm2/s
Fluence Band 7.83e-07 1.24e-06 1.04e-06 5.08e-07 3.41e-06 3.58e-06 erg/cm2
Error 1.06e-07 1.36e-07 2.06e-07 -------- 4.30e-07 7.15e-07 erg/cm2
Peak flux Band 1.96e-01 2.49e-01 9.06e-02 3.13e-02 5.57e-01 5.68e-01 ph/cm2/s
Error 1.22e-01 -------- -------- -------- -------- 2.09e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.362 0.038 - - 5.68e-03 1.12e-04 49.650 57
CPL 1.048 0.158 175.0 74.7 7.77e-03 1.20e-03 37.400 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.024 0.064 - - 7.80e-02 2.87e-03 50.560 57
CPL 0.749 0.253 260.5 419.2 1.04e-01 2.66e-02 46.930 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: 50.048000 sec.
T50 in the 50-300 keV band: 10.944000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 316.392 -197.320 119.072
T90 242.540 -191.832 50.708
T50 25.292 -182.004 -156.712
Peak 1.000 -177.488 -176.488
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
277.0060 +86.4156 0.0152 25.9 68.0 2.7045 12.6 TRIG_00634200
------------------------------------------
Foreground time interval of the image:
-96.899 73.601 (delta_t = 170.500 [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 -197.320 sec. to 119.072 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36179 ( -0.0375527 0.0374644 )
Norm@50keV : 5.67821E-03 ( -0.000111937 0.000111894 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.65 using 59 PHA bins.
# Reduced chi-squared = 0.8710 for 57 degrees of freedom
# Null hypothesis probability = 7.445710e-01
Photon flux (15-150 keV) in 316.4 sec: 0.685741 ( -0.0152199 0.0152652 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.7501e-05 ( -3.54786e-07 3.55036e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -197.320 sec. to 119.072 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04844 ( -0.160546 0.155067 )
Epeak [keV] : 174.975 ( -39.9211 109.426 )
Norm@50keV : 7.76911E-03 ( -0.0010908 0.00131451 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.40 using 59 PHA bins.
# Reduced chi-squared = 0.6679 for 56 degrees of freedom
# Null hypothesis probability = 9.735667e-01
Photon flux (15-150 keV) in 316.4 sec: 0.668995 ( -0.017003 0.017088 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71766e-05 ( -3.93222e-07 3.91418e-07 ) ergs/cm2
Band function
Time interval is from -197.320 sec. to 119.072 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.659627 ( -0.519885 1.51999 )
beta : -1.47543 ( 1.47474 0.0806457 )
Epeak [keV] : 84.4764 ( -42.6435 171.206 )
Norm@50keV : 1.31793E-02 ( -0.00663446 0.138388 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.60 using 59 PHA bins.
# Reduced chi-squared = 0.6654 for 55 degrees of freedom
# Null hypothesis probability = 9.734817e-01
Photon flux (15-150 keV) in 316.4 sec: 0.189048 ( 6.81095 -0.021453 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.41019e-06 ( -3.40798e-06 -4.48627e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.7564 ( )
R^2/D10^2 : 3.61798E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 442.78 using 59 PHA bins.
# Reduced chi-squared = 7.7681 for 57 degrees of freedom
# Null hypothesis probability = 4.379935e-61
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.952e-07 3.243e-08
25- 50 3.790e-06 1.123e-07
50-150 9.773e-06 3.306e-07
15-150 1.436e-05 3.037e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 2.90621 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 138.17 using 59 PHA bins.
# Reduced chi-squared = 2.4241 for 57 degrees of freedom
# Null hypothesis probability = 1.083332e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.290e-06 5.141e-08
25- 50 4.405e-06 1.012e-07
50-150 9.660e-06 2.136e-07
15-150 1.635e-05 3.433e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.38399 (-0.713452 0.761647)
R1^2/D10^2 : 0.328556 (-0.0777766 0.109969)
kT2 [keV] : 30.4343 (-2.35421 3.03344)
R2^2/D10^2 : 5.71313E-03 (-0.00161398 0.00191489)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.16 using 59 PHA bins.
# Reduced chi-squared = 0.7302 for 55 degrees of freedom
# Null hypothesis probability = 9.334218e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.625e-06 1.204e-07
25- 50 4.199e-06 1.883e-07
50-150 1.127e-05 5.600e-07
15-150 1.709e-05 7.420e-07
Peak spectrum fit
Power-law model
Time interval is from -177.488 sec. to -176.488 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02402 ( -0.0645062 0.0641443 )
Norm@50keV : 7.80115E-02 ( -0.00287356 0.00287206 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.56 using 59 PHA bins.
# Reduced chi-squared = 0.8870 for 57 degrees of freedom
# Null hypothesis probability = 7.137177e-01
Photon flux (15-150 keV) in 1 sec: 8.99381 ( -0.337145 0.337563 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.36543e-07 ( -3.407e-08 3.41361e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -177.488 sec. to -176.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.748708 ( -0.262366 0.243989 )
Epeak [keV] : 260.493 ( -99.1265 739.178 )
Norm@50keV : 0.103681 ( -0.0219852 0.0311373 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.93 using 59 PHA bins.
# Reduced chi-squared = 0.8380 for 56 degrees of freedom
# Null hypothesis probability = 8.007947e-01
Photon flux (15-150 keV) in 1 sec: 8.89890 ( -0.34724 0.34736 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.26494e-07 ( -3.5867e-08 3.5699e-08 ) ergs/cm2
Band function
Time interval is from -177.488 sec. to -176.488 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99996 ( -14.9988 -4.99996 )
beta : -1.07890 ( -0.0720679 0.0714028 )
Epeak [keV] : 28.3936 ( -6.55136 3.81546 )
Norm@50keV : 2555.91 ( -93.3815 9365.22 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.36 using 59 PHA bins.
# Reduced chi-squared = 0.8429 for 55 degrees of freedom
# Null hypothesis probability = 7.901730e-01
Photon flux (15-150 keV) in 1 sec: 0.557256 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.37389e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.4411 ( )
R^2/D10^2 : 0.348762 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 164.70 using 59 PHA bins.
# Reduced chi-squared = 2.8895 for 57 degrees of freedom
# Null hypothesis probability = 2.140388e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.002e-08 2.160e-09
25- 50 1.563e-07 8.350e-09
50-150 5.363e-07 3.245e-08
15-150 7.226e-07 3.215e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 36.3121 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 225.35 using 59 PHA bins.
# Reduced chi-squared = 3.9534 for 57 degrees of freedom
# Null hypothesis probability = 7.131659e-22
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.042e-08 3.805e-09
25- 50 1.739e-07 6.950e-09
50-150 3.815e-07 1.605e-08
15-150 6.458e-07 2.485e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.65741 (-1.41738 1.55282)
R1^2/D10^2 : 2.44189 (-0.806085 1.38821)
kT2 [keV] : 39.0499 (-6.10235 10.4392)
R2^2/D10^2 : 4.45246E-02 (-0.02229 0.0319143)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.29 using 59 PHA bins.
# Reduced chi-squared = 0.7871 for 55 degrees of freedom
# Null hypothesis probability = 8.734013e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.470e-08 8.075e-09
25- 50 1.686e-07 1.750e-08
50-150 6.109e-07 1.252e-07
15-150 8.343e-07 1.179e-07
Plot creation:
Tue Mar 10 20:26:35 EDT 2015