batgrbproduct Analysis for Trigger=579982
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): Wed Dec 4 11:02:18 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger579982/batgroup_hand_proc
======================================================================
Trigger: 00579982 Segment: 000
BAT Trigger Time: 407689940.672 [s; MET]
Trigger Stop: 407689943.744 [s; MET]
UTC: 2013-12-02T15:12:09.327060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 344.05606070492 Dec: -21.6577101512323 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.35
Image Trigger?: NO
Rate S/N Ratio: 10.8627804912002 [ if not an image trigger ]
Image S/N Ratio: 7.35
Flight Position: [ source = BAT ]
RA: 344.05606070492 Dec: -21.6577101512323 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 344.008489540281 Dec: -21.6439463344936 [deg; J2000]
{ 22h 56m 02.0s , -21d 38' 38.2" }
+/- 2.06845242270361 [arcmin] (estimated 90% radius based on SNR)
+/- 1.00060197746357 [arcmin] (formal 1-sigma fit error)
SNR: 10.7695159982716
Angular difference between Flight and Ground position is 2.778466 arcmin
Partial Coding Fraction: 0.6328125 [ including projection effects ]
Duration
T90: 33.3920000195503 +/- 11.6454062950449
Measured from: -0.631999850273132
to: 32.7600001692772 [s; relative to TRIGTIME]
T50: 13.1040000319481 +/- 5.90337123745482
Measured from: 2.2800001502037
to: 15.3840001821518 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.62800002098083
to: 2.62800002098083 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.60799998044968
to: 37.7039999961853 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.270219 0.329647 0.289877 0.035595
0.044994 0.046416 0.040445 0.034642 [error]
Peak 0.018951 0.030023 0.021335 0.015202
0.007525 0.007534 0.007046 0.005722 [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 9.00e-08 1.57e-07 2.08e-07 5.65e-07 6.07e-07 1.02e-06 erg/cm2
Error 2.14e-08 2.26e-08 4.01e-08 2.35e-07 9.53e-08 2.66e-07 erg/cm2
Peak flux Power-law 2.02e-01 2.15e-01 1.62e-01 1.99e-01 6.54e-01 7.77e-01 ph/cm2/s
Error 1.04e-01 6.83e-02 5.50e-02 1.44e-01 1.90e-01 2.20e-01 ph/cm2/s
Fluence Cutoff-PL 8.99e-08 1.57e-07 2.08e-07 5.61e-07 6.07e-07 1.02e-06 erg/cm2
Error 2.12e-08 2.39e-08 4.09e-08 4.10e-07 9.61e-08 3.41e-07 erg/cm2
Peak flux Cutoff-PL 2.04e-01 2.16e-01 1.61e-01 1.95e-01 6.56e-01 7.76e-01 ph/cm2/s
Error 1.08e-01 7.04e-02 5.80e-02 1.84e-01 1.90e-01 2.37e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.590 0.254 - - 1.65e-03 2.39e-04 57.650 57
CPL 1.588 1.448 10000.0 0.0 1.65e-03 -7.05e-04 57.660 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.405 0.515 - - 5.36e-03 1.51e-03 49.320 57
CPL 1.405 1.111 9999.4 0.0 5.38e-03 1.48e-02 49.320 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: 8.448000 sec.
T50 in the 50-300 keV band: 4.416000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 39.312 -1.608 37.704
T90 33.392 -0.632 32.760
T50 13.104 2.280 15.384
Peak 1.000 1.628 2.628
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
344.0085 -21.6439 0.0178 37.8010 -164.0700 0.9553240 10.770 TRIG_00579982
Foreground time interval of the image:
-1.608 37.704 (delta_t = 39.312 [sec])
Background time interval of the image:
-239.672 -56.956 (delta_t = 182.716 [sec])
-55.672 -1.608 (delta_t = 54.064 [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 -1.608 sec. to 37.704 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58968 ( -0.251141 0.2573 )
Norm@50keV : 1.64830E-03 ( -0.000240815 0.000237525 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.65 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 57 degrees of freedom
# Null hypothesis probability = 4.508921e-01
Photon flux (15-150 keV) in 39.31 sec: 0.211143 ( -0.0300551 0.0301363 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.06742e-07 ( -9.47799e-08 9.58523e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.608 sec. to 37.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58765 ( -0.851042 2.04459 )
Epeak [keV] : 1.00000E+04 ( )
Norm@50keV : 1.65236E-03 ( -0.000242641 -0.00165239 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.66 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 56 degrees of freedom
# Null hypothesis probability = 4.137907e-01
Photon flux (15-150 keV) in 39.31 sec: 0.211158 ( -0.030137 0.030016 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.06907e-07 ( -9.7135e-08 9.49651e-08 ) ergs/cm2
Band function
Time interval is from -1.608 sec. to 37.704 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.32253 ( 1.32253 1.32253 )
beta : -1.58966 ( 1.58967 0.251329 )
Epeak [keV] : 28.1544 ( -28.1164 -28.1164 )
Norm@50keV : 3.21845E-03 ( -0.00179882 0.253091 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.65 using 59 PHA bins.
# Reduced chi-squared = 1.048 for 55 degrees of freedom
# Null hypothesis probability = 3.773629e-01
Photon flux (15-150 keV) in 39.31 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] : 14.9562 (-2.66085 3.31844)
R^2/D10^2 : 2.32654E-02 (-0.0117514 0.0233932)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.59 using 59 PHA bins.
# Reduced chi-squared = 1.309 for 57 degrees of freedom
# Null hypothesis probability = 5.889426e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.285e-08 1.264e-08
25- 50 1.698e-07 3.960e-08
50-150 2.582e-07 7.223e-08
15-150 4.708e-07 1.008e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.152 (-98.2373 -198.306)
Norm : 0.853202 (-0.118497 0.144196)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.28 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 57 degrees of freedom
# Null hypothesis probability = 4.279848e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.358e-08 4.782e-08
25- 50 1.607e-07 8.870e-08
50-150 3.517e-07 1.942e-07
15-150 5.959e-07 3.267e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.80555 (-2.0659 3.56172)
R1^2/D10^2 : 0.960990 (-0.829027 14.4217)
kT2 [keV] : 22.4094 (-5.77033 16.4074)
R2^2/D10^2 : 4.84660E-03 (-0.00410123 0.00958313)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.40 using 59 PHA bins.
# Reduced chi-squared = 1.062 for 55 degrees of freedom
# Null hypothesis probability = 3.517293e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.573e-08 5.409e-08
25- 50 1.401e-07 6.188e-08
50-150 3.537e-07 2.026e-07
15-150 5.895e-07 2.557e-07
Peak spectrum fit
Power-law model
Time interval is from 1.628 sec. to 2.628 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40544 ( -0.513541 0.516561 )
Norm@50keV : 5.36282E-03 ( -0.0015099 0.00150215 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.32 using 59 PHA bins.
# Reduced chi-squared = 0.8652 for 57 degrees of freedom
# Null hypothesis probability = 7.554352e-01
Photon flux (15-150 keV) in 1 sec: 0.653898 ( -0.189925 0.19097 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.17615e-08 ( -1.57798e-08 1.59551e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.628 sec. to 2.628 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40519 ( -1.70598 0.516306 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 5.38076E-03 ( -0.00151766 0.0279915 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.32 using 59 PHA bins.
# Reduced chi-squared = 0.8807 for 56 degrees of freedom
# Null hypothesis probability = 7.240091e-01
Photon flux (15-150 keV) in 1 sec: 0.655639 ( -0.191569 0.189011 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.15338e-08 ( -1.56254e-08 1.61069e-08 ) ergs/cm2
Band function
Time interval is from 1.628 sec. to 2.628 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.14937 ( 1.15081 1.15081 )
beta : -1.40504 ( 1.40541 0.514261 )
Epeak [keV] : 40.3083 ( -39.3144 -39.3144 )
Norm@50keV : 9.94840E-03 ( -0.00609444 0.923081 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.32 using 59 PHA bins.
# Reduced chi-squared = 0.8966 for 55 degrees of freedom
# Null hypothesis probability = 6.906669e-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] : 16.7823 (-6.56044 11.9884)
R^2/D10^2 : 4.98818E-02 (-0.0484539 0.221586)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.57 using 59 PHA bins.
# Reduced chi-squared = 0.9575 for 57 degrees of freedom
# Null hypothesis probability = 5.666079e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.871e-09 1.848e-09
25- 50 1.257e-08 7.745e-09
50-150 2.518e-08 1.637e-08
15-150 4.062e-08 2.604e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-119.308 -199.363)
Norm : 2.70773 (-0.761503 0.761503)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.88 using 59 PHA bins.
# Reduced chi-squared = 0.8752 for 57 degrees of freedom
# Null hypothesis probability = 7.367299e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.742e-09 4.029e-09
25- 50 1.297e-08 7.915e-09
50-150 2.845e-08 1.750e-08
15-150 4.816e-08 2.837e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.08053 (-5.2436 6.91138)
R1^2/D10^2 : 0.465506 (-0.404759 33.0912)
kT2 [keV] : 42.6555 (-39.8058 -42.6526)
R2^2/D10^2 : 1.96824E-03 (-0.001837 0.0318979)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.13 using 59 PHA bins.
# Reduced chi-squared = 0.8932 for 55 degrees of freedom
# Null hypothesis probability = 6.974118e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.978e-09 3.650e-09
25- 50 1.292e-08 7.950e-09
50-150 3.429e-08 1.930e-08
15-150 5.319e-08 2.541e-08
Plot creation:
Wed Dec 4 11:24:48 EST 2013