batgrbproduct Analysis for Trigger=612804
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 Sep 17 10:50:22 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger612804/GCN5_download_cron
======================================================================
Trigger: 00612804 Segment: 000
BAT Trigger Time: 432557040 [s; MET]
Trigger Stop: 432557104 [s; MET]
UTC: 2014-09-16T10:43:47.465980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 40.4046851109949 Dec: -39.7108825055143 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.87
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.87
Flight Position: [ source = BAT ]
RA: 40.4046851109949 Dec: -39.7108825055143 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 40.3840862760964 Dec: -39.6884927859406 [deg; J2000]
{ 02h 41m 32.2s , -39d 41' 18.6" }
+/- 2.42196886208938 [arcmin] (estimated 90% radius based on SNR)
+/- 1.25719522559574 [arcmin] (formal 1-sigma fit error)
SNR: 8.59619300837187
Angular difference between Flight and Ground position is 1.645887 arcmin
Partial Coding Fraction: 0.1660156 [ including projection effects ]
Duration
T90: 80.0960000753403 +/- 15.6097794783625
Measured from: -3.09599989652634
to: 77.0000001788139 [s; relative to TRIGTIME]
T50: 45.8080000281334 +/- 18.453189190304
Measured from: 5.96000009775162
to: 51.768000125885 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.80400002002716
to: 2.80400002002716 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.63200002908707
to: 89.527999997139 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.921271 1.307689 0.553863 0.003087
0.144464 0.147707 0.127871 0.107146 [error]
Peak 0.048806 0.056436 0.041861 0.018030
0.014803 0.015915 0.013633 0.011284 [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 4.28e-07 5.31e-07 4.80e-07 7.52e-07 1.70e-06 2.19e-06 erg/cm2
Error 8.57e-08 7.80e-08 1.21e-07 3.69e-07 2.85e-07 5.14e-07 erg/cm2
Peak flux Power-law 5.42e-01 4.51e-01 2.54e-01 2.13e-01 1.34e+00 1.46e+00 ph/cm2/s
Error 2.50e-01 1.41e-01 1.08e-01 1.74e-01 4.22e-01 4.51e-01 ph/cm2/s
Fluence Cutoff-PL 3.66e-07 6.22e-07 4.68e-07 1.31e-07 1.56e-06 1.59e-06 erg/cm2
Error 1.03e-07 1.13e-07 1.50e-07 2.88e-07 2.94e-07 4.05e-07 erg/cm2
Peak flux Cutoff-PL 4.45e-01 5.22e-01 2.76e-01 6.04e-02 1.29e+00 1.30e+00 ph/cm2/s
Error 3.77e-01 1.96e-01 1.35e-01 1.89e-01 4.37e-01 4.85e-01 ph/cm2/s
Fluence Band 3.64e-07 6.18e-07 4.68e-07 1.32e-07 1.56e-06 1.59e-06 erg/cm2
Error 9.31e-08 1.12e-07 1.38e-07 -------- 2.82e-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 2.148 0.271 - - 1.89e-03 3.52e-04 64.560 57
CPL 0.699 1.539 38.8 0.0 1.22e-02 0.00e+00 60.580 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.824 0.527 - - 9.64e-03 3.28e-03 47.930 57
CPL 0.432 3.131 52.6 0.0 5.35e-02 0.00e+00 47.010 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: 33.792000 sec.
T50 in the 50-300 keV band: 16.512000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 96.160 -6.632 89.528
T90 80.096 -3.096 77.000
T50 45.808 5.960 51.768
Peak 1.000 1.804 2.804
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
40.3841 -39.6885 0.0222 47.8 18.6 2.5201 8.6 TRIG_00612804
------------------------------------------
Foreground time interval of the image:
-6.632 71.901 (delta_t = 78.533 [sec])
Background time interval of the image:
-210.799 -130.300 (delta_t = 80.499 [sec])
-129.000 -6.632 (delta_t = 122.368 [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 -6.632 sec. to 89.528 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14751 ( -0.258263 0.284656 )
Norm@50keV : 1.89021E-03 ( -0.000357974 0.00034688 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.56 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 57 degrees of freedom
# Null hypothesis probability = 2.294252e-01
Photon flux (15-150 keV) in 96.16 sec: 0.304548 ( -0.0446107 0.0446565 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69742e-06 ( -2.82199e-07 2.88293e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.632 sec. to 89.528 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.699382 ( -1.81562 1.26226 )
Epeak [keV] : 38.8109 ( )
Norm@50keV : 1.22425E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.58 using 59 PHA bins.
# Reduced chi-squared = 1.082 for 56 degrees of freedom
# Null hypothesis probability = 3.140181e-01
Photon flux (15-150 keV) in 96.16 sec: 0.289520 ( -0.046683 0.046518 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.56022e-06 ( -2.83797e-07 3.04904e-07 ) ergs/cm2
Band function
Time interval is from -6.632 sec. to 89.528 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.699883 ( -0.728832 2.00643 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 38.7975 ( -21.7038 12.6035 )
Norm@50keV : 1.22367E-02 ( -0.0122366 0.121369 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.58 using 59 PHA bins.
# Reduced chi-squared = 1.102 for 55 degrees of freedom
# Null hypothesis probability = 2.814613e-01
Photon flux (15-150 keV) in 96.16 sec: 0.294982 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.56148e-06 ( -1.56081e-06 -2.85999e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.1768 (-1.43363 1.65699)
R^2/D10^2 : 0.134593 (-0.0601013 0.107948)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.39 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 57 degrees of freedom
# Null hypothesis probability = 2.337862e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.746e-07 7.058e-08
25- 50 6.996e-07 1.452e-07
50-150 3.841e-07 1.395e-07
15-150 1.358e-06 2.692e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 55.4845 (-17.1188 29.0385)
Norm : 1.66478 (-0.366305 0.463187)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.19 using 59 PHA bins.
# Reduced chi-squared = 1.073 for 57 degrees of freedom
# Null hypothesis probability = 3.280602e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.968e-07 8.443e-08
25- 50 5.891e-07 1.071e-07
50-150 6.270e-07 2.485e-07
15-150 1.613e-06 3.274e-07
Double BB
R1^2/D10^2 : 1196.10 ( )
kT2 [keV] : 11.1051 (-1.69508 2.12108)
R2^2/D10^2 : 9.08608E-02 (-0.04736 0.0590868)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.39 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.11 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.99 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 55 degrees of freedom
# Reduced chi-squared = 1.038 for 55 degrees of freedom
# Reduced chi-squared = 1.036 for 55 degrees of freedom
# Null hypothesis probability = 1.809001e-01
# Null hypothesis probability = 3.966761e-01
# Null hypothesis probability = 4.010379e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 1.804 sec. to 2.804 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82416 ( -0.499427 0.555206 )
Norm@50keV : 9.63755E-03 ( -0.00334141 0.00320954 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.93 using 59 PHA bins.
# Reduced chi-squared = 0.8409 for 57 degrees of freedom
# Null hypothesis probability = 7.982852e-01
Photon flux (15-150 keV) in 1 sec: 1.34062 ( -0.42104 0.422607 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.86601e-08 ( -2.99146e-08 3.06197e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.804 sec. to 2.804 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.432193 ( -4.51793 1.74335 )
Epeak [keV] : 52.6050 ( )
Norm@50keV : 5.34580E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.01 using 59 PHA bins.
# Reduced chi-squared = 0.8395 for 56 degrees of freedom
# Null hypothesis probability = 7.983412e-01
Photon flux (15-150 keV) in 1 sec: 1.29073 ( -0.438958 0.43414 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.27438e-08 ( -2.94217e-08 3.23612e-08 ) ergs/cm2
Band function
Time interval is from 1.804 sec. to 2.804 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.525299 ( -1.69807 4.40493 )
beta : -9.37013 ( 9.37142 19.3714 )
Epeak [keV] : 53.6458 ( -21.9204 205.49 )
Norm@50keV : 4.71907E-02 ( -0.0472236 4697.68 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.02 using 59 PHA bins.
# Reduced chi-squared = 0.8548 for 55 degrees of freedom
# Null hypothesis probability = 7.694957e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.35182e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.6096 (-3.40652 4.53048)
R^2/D10^2 : 0.288142 (-0.288141 0.623616)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.80 using 59 PHA bins.
# Reduced chi-squared = 0.8386 for 57 degrees of freedom
# Null hypothesis probability = 8.022644e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.715e-09 6.225e-09
25- 50 3.236e-08 1.988e-08
50-150 3.194e-08 2.182e-08
15-150 7.402e-08 4.586e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 93.9886 (-54.0944 -93.9886)
Norm : 6.12539 (-2.21606 3.40244)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.31 using 59 PHA bins.
# Reduced chi-squared = 0.8300 for 57 degrees of freedom
# Null hypothesis probability = 8.162982e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.600e-08 1.014e-08
25- 50 2.731e-08 1.681e-08
50-150 4.270e-08 3.516e-08
15-150 8.601e-08 5.860e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.46498 (-3.46807 34.4921)
R1^2/D10^2 : 17.6323 (-17.5953 125.869)
kT2 [keV] : 14.2483 (-4.36216 -14.2493)
R2^2/D10^2 : 0.165611 (-0.165557 0.522853)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.69 using 59 PHA bins.
# Reduced chi-squared = 0.8490 for 55 degrees of freedom
# Null hypothesis probability = 7.797214e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.474e-08 8.495e-09
25- 50 2.862e-08 1.672e-08
50-150 3.619e-08 2.472e-08
15-150 7.955e-08 4.553e-08
Plot creation:
Wed Sep 17 10:53:58 EDT 2014