batgrbproduct Analysis for Trigger=542441
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: bat-burst-advocate v2.46
Process Start Time (local time): Mon Dec 17 20:31:17 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger542441/GCN5_download_hand
======================================================================
Trigger: 00542441 Segment: 000
BAT Trigger Time: 377421477.888 [s; MET]
Trigger Stop: 377421478.912 [s; MET]
UTC: 2012-12-17T07:17:47.893900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 153.72364002391 Dec: -62.30383321643 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.88
Image Trigger?: NO
Rate S/N Ratio: 20.4939015319192 [ if not an image trigger ]
Image S/N Ratio: 8.88
Flight Position: [ source = BAT ]
RA: 153.72364002391 Dec: -62.30383321643 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 153.708216357506 Dec: -62.3543137194543 [deg; J2000]
{ 10h 14m 50.0s , -62d 21' 15.5" }
+/- 0.862875782336148 [arcmin] (estimated 90% radius based on SNR)
+/- 0.416250328414876 [arcmin] (formal 1-sigma fit error)
SNR: 37.5509420652267
Angular difference between Flight and Ground position is 3.059167 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 777.919999957085 +/- 16.1585826231588
Measured from: -11.4599999189377
to: 766.460000038147 [s; relative to TRIGTIME]
T50: 129.067999958992 +/- 322.006156000995
Measured from: 607.676000118256
to: 736.744000077248 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 735.959999978542
to: 736.959999978542 [s; relative to TRIGTIME]
Total Fluence
Measured from: -17.7319999933243
to: 783.759999990463 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.020216 3.961424 2.867522 0.659513
0.145446 0.147425 0.126861 0.109190 [error]
Peak 0.062353 0.083025 0.063591 0.020924
0.006136 0.006373 0.005613 0.004427 [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 8.61e-07 1.56e-06 2.16e-06 6.25e-06 6.21e-06 1.08e-05 erg/cm2
Error 7.01e-08 7.33e-08 1.26e-07 8.16e-07 3.00e-07 8.97e-07 erg/cm2
Peak flux Power-law 5.64e-01 5.79e-01 4.20e-01 4.87e-01 1.75e+00 2.05e+00 ph/cm2/s
Error 8.17e-02 5.13e-02 4.55e-02 1.09e-01 1.47e-01 1.75e-01 ph/cm2/s
Fluence Cutoff-PL 8.61e-07 1.56e-06 2.16e-06 6.20e-06 1.08e-05 0.00e+00 erg/cm2
Error 7.77e-08 7.42e-08 1.26e-07 1.60e-06 1.65e-06 0.00e+00 erg/cm2
Peak flux Cutoff-PL 5.49e-01 5.88e-01 4.25e-01 4.03e-01 1.74e+00 1.96e+00 ph/cm2/s
Error 9.45e-02 5.87e-02 4.95e-02 1.90e-01 1.52e-01 2.52e-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 1.92e+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 1.527 0.083 - - 8.21e-04 3.63e-05 53.360 57
CPL 1.524 0.201 10000.0 0.0 8.23e-04 3.63e-05 53.360 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.465 0.148 - - 1.42e-02 1.21e-03 54.900 57
CPL 1.314 0.430 227.4 0.0 1.69e-02 1.04e-02 54.660 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: 786.624000 sec.
T50 in the 50-300 keV band: 725.376000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 801.492 -17.732 783.760
T90 777.920 -11.460 766.460
T50 129.068 607.676 736.744
Peak 1.000 735.960 736.960
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
153.7082 -62.3543 0.0051 10.5103 -89.4603 2.5644807 37.551 TRIG_00542441
Foreground time interval of the image:
-17.732 19.013 (delta_t = 36.745 [sec])
Background time interval of the image:
-239.888 -17.732 (delta_t = 222.156 [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 -17.732 sec. to 783.760 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52653 ( -0.0827049 0.0828846 )
Norm@50keV : 8.20649E-04 ( -3.63331e-05 3.62272e-05 )
------------------------------------------------------------
# Chi-Squared = 53.36 using 59 PHA bins.
# Reduced chi-squared = 0.9361 for 57 degrees of freedom
# Null hypothesis probability = 6.124856e-01
Photon flux (15-150 keV) in 801.5 sec: 0.103198 ( -0.00471038 0.00472503 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.21362e-06 ( -2.99122e-07 3.00542e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -17.732 sec. to 783.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52411 ( -0.31016 0.0909429 )
Epeak [keV] : 10000.00 ( )
Norm@50keV : 8.22964E-04 ( -3.61726e-05 3.63861e-05 )
------------------------------------------------------------
# Chi-Squared = 53.36 using 59 PHA bins.
# Reduced chi-squared = 0.9528 for 56 degrees of freedom
# Null hypothesis probability = 5.755312e-01
Photon flux (15-150 keV) in 801.5 sec: 0.103158 ( -0.004712 0.004711 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07831e-05 ( -2.36811e-06 9.23248e-07 ) ergs/cm2
Band function
Time interval is from -17.732 sec. to 783.760 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.996404 ( 0.981773 5.89853 )
beta : -1.56804 ( -0.143833 0.112907 )
Epeak [keV] : 61.8959 ( -59.4295 -59.4295 )
Norm@50keV : 1.79202E-03 ( -0.0011335 0 )
------------------------------------------------------------
# Chi-Squared = 52.63 using 59 PHA bins.
# Reduced chi-squared = 0.9568 for 55 degrees of freedom
# Null hypothesis probability = 5.658762e-01
Photon flux (15-150 keV) in 801.5 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] : 15.0684 ( )
R^2/D10^2 : 1.09351E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 190.51 using 59 PHA bins.
# Reduced chi-squared = 3.3422 for 57 degrees of freedom
# Null hypothesis probability = 2.741276e-16
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.163e-07 3.807e-08
25- 50 1.661e-06 1.042e-07
50-150 2.572e-06 2.132e-07
15-150 4.650e-06 2.304e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.993 ( )
Norm : 0.419183 (-0.0181818 0.0181818)
------------------------------------------------------------
# Chi-Squared = 56.40 using 59 PHA bins.
# Reduced chi-squared = 0.9894 for 57 degrees of freedom
# Null hypothesis probability = 4.976120e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.367e-07 4.288e-07
25- 50 1.609e-06 8.259e-07
50-150 3.530e-06 1.807e-06
15-150 5.976e-06 3.055e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.38761 (-0.918325 0.989669)
R1^2/D10^2 : 9.47258E-02 (-0.0326798 0.0558432)
kT2 [keV] : 30.5302 (-4.68442 7.23378)
R2^2/D10^2 : 7.67918E-04 (-0.000379147 0.000594525)
------------------------------------------------------------
# Chi-Squared = 52.13 using 59 PHA bins.
# Reduced chi-squared = 0.9478 for 55 degrees of freedom
# Null hypothesis probability = 5.849644e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.904e-07 1.048e-07
25- 50 1.616e-06 1.703e-07
50-150 3.820e-06 8.019e-07
15-150 6.226e-06 8.476e-07
Peak spectrum fit
Power-law model
Time interval is from 735.960 sec. to 736.960 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46507 ( -0.147372 0.148628 )
Norm@50keV : 1.41611E-02 ( -0.00121419 0.00120749 )
------------------------------------------------------------
# Chi-Squared = 54.90 using 59 PHA bins.
# Reduced chi-squared = 0.9632 for 57 degrees of freedom
# Null hypothesis probability = 5.541489e-01
Photon flux (15-150 keV) in 1 sec: 1.75178 ( -0.147104 0.147289 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35142e-07 ( -1.28618e-08 1.2985e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 735.960 sec. to 736.960 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31396 ( -0.57594 0.284441 )
Epeak [keV] : 227.388 ( -227.388 -227.388 )
Norm@50keV : 1.68958E-02 ( -0.00530425 0.0155576 )
------------------------------------------------------------
# Chi-Squared = 54.66 using 59 PHA bins.
# Reduced chi-squared = 0.9761 for 56 degrees of freedom
# Null hypothesis probability = 5.256089e-01
Photon flux (15-150 keV) in 1 sec: 1.73974 ( -0.1527 0.15202 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.13552e-07 ( -6.4584e-08 8.4209e-08 ) ergs/cm2
Band function
Time interval is from 735.960 sec. to 736.960 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.32244 ( 0.94644 5.85195 )
beta : -2.36593 ( 7.23621 5.91178 )
Epeak [keV] : 238.127 ( -124.887 -238.11 )
Norm@50keV : 1.67264E-02 ( -0.00368741 0.00382054 )
------------------------------------------------------------
# Chi-Squared = 54.66 using 59 PHA bins.
# Reduced chi-squared = 0.9939 for 55 degrees of freedom
# Null hypothesis probability = 4.874485e-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] : 15.2663 (-1.71489 1.96782)
R^2/D10^2 : 0.185111 (-0.0632029 0.0949998)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 92.17 using 59 PHA bins.
# Reduced chi-squared = 1.617 for 57 degrees of freedom
# Null hypothesis probability = 2.194977e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.005e-09 1.534e-09
25- 50 3.636e-08 4.465e-09
50-150 5.812e-08 9.975e-09
15-150 1.035e-07 1.192e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.996 ( )
Norm : 7.17476 (-7.17476 -7.17476)
------------------------------------------------------------
# Chi-Squared = 55.84 using 59 PHA bins.
# Reduced chi-squared = 0.9797 for 57 degrees of freedom
# Null hypothesis probability = 5.185496e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.787e-08 9.455e-09
25- 50 3.437e-08 1.794e-08
50-150 7.538e-08 4.004e-08
15-150 1.276e-07 6.730e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.49151 (-1.66543 2.09912)
R1^2/D10^2 : 2.30905 (-1.3895 4.55611)
kT2 [keV] : 26.2648 (-5.57827 11.2454)
R2^2/D10^2 : 2.35677E-02 (-0.0164524 0.0321292)
------------------------------------------------------------
# Chi-Squared = 54.86 using 59 PHA bins.
# Reduced chi-squared = 0.9975 for 55 degrees of freedom
# Null hypothesis probability = 4.797637e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.710e-08 6.467e-09
25- 50 3.290e-08 1.133e-08
50-150 8.318e-08 3.809e-08
15-150 1.332e-07 4.080e-08
Plot creation:
Mon Dec 17 21:22:00 EST 2012