batgrbproduct Analysis for Trigger=557354
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 Jun 4 21:49:21 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557354/GCN5_download_cron
======================================================================
Trigger: 00557354 Segment: 000
BAT Trigger Time: 392021677.632 [s; MET]
Trigger Stop: 392021681.728 [s; MET]
UTC: 2013-06-04T06:54:26.998160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 250.080442177307 Dec: 68.2100394725204 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.99
Image Trigger?: NO
Rate S/N Ratio: 12.369316876853 [ if not an image trigger ]
Image S/N Ratio: 7.99
Flight Position: [ source = BAT ]
RA: 250.080442177307 Dec: 68.2100394725204 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 250.16613473816 Dec: 68.2245479852911 [deg; J2000]
{ 16h 40m 39.9s , +68d 13' 28.4" }
+/- 1.12423525394676 [arcmin] (estimated 90% radius based on SNR)
+/- 0.538083510167903 [arcmin] (formal 1-sigma fit error)
SNR: 25.7315079100638
Angular difference between Flight and Ground position is 2.097171 arcmin
Partial Coding Fraction: 0.8125 [ including projection effects ]
Duration
T90: 37.7399999499321 +/- 4.55927186783047
Measured from: 1.18800008296967
to: 38.9280000329018 [s; relative to TRIGTIME]
T50: 17.5319999456406 +/- 2.4288005734513
Measured from: 7.78400009870529
to: 25.3160000443459 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 14.3919999599457
to: 15.3919999599457 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.444000005722046
to: 43.5799999833107 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.608896 0.861838 0.586896 0.158407
0.046950 0.048262 0.042884 0.037404 [error]
Peak 0.018385 0.039422 0.023062 0.017126
0.007301 0.007316 0.006738 0.005633 [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 1.93e-07 3.52e-07 4.94e-07 1.45e-06 1.42e-06 2.49e-06 erg/cm2
Error 2.22e-08 2.39e-08 4.24e-08 2.73e-07 1.02e-07 3.03e-07 erg/cm2
Peak flux Power-law 2.13e-01 2.44e-01 2.00e-01 2.76e-01 7.57e-01 9.33e-01 ph/cm2/s
Error 9.34e-02 6.42e-02 5.39e-02 1.65e-01 1.76e-01 2.19e-01 ph/cm2/s
Fluence Cutoff-PL 1.94e-07 3.53e-07 4.93e-07 1.43e-06 1.41e-06 2.47e-06 erg/cm2
Error 2.27e-08 2.44e-08 4.19e-08 3.76e-07 1.01e-07 4.61e-07 erg/cm2
Peak flux Cutoff-PL 2.18e-01 2.46e-01 1.99e-01 2.68e-01 7.60e-01 9.31e-01 ph/cm2/s
Error 9.26e-02 6.41e-02 5.41e-02 2.51e-01 1.76e-01 2.44e-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 1.512 0.118 - - 3.40e-03 2.22e-04 48.810 57
CPL 1.516 0.119 9999.4 0.0 3.40e-03 1.60e-03 48.830 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.284 0.423 - - 6.37e-03 1.43e-03 58.540 57
CPL 2.718 0.000 219.1 0.0 9.57e-04 0.00e+00 58.470 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: 25.472000 sec.
T50 in the 50-300 keV band: 12.736000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 44.024 -0.444 43.580
T90 37.740 1.188 38.928
T50 17.532 7.784 25.316
Peak 1.000 14.392 15.392
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
250.1661 +68.2245 0.0075 30.8 -168.1 2.1953 25.7 TRIG_00557354
------------------------------------------
Foreground time interval of the image:
-0.444 35.669 (delta_t = 36.113 [sec])
Background time interval of the image:
-239.632 -176.672 (delta_t = 62.960 [sec])
-174.632 -169.582 (delta_t = 5.050 [sec])
-168.632 -168.282 (delta_t = 0.350 [sec])
-166.632 -164.942 (delta_t = 1.690 [sec])
-163.632 -161.443 (delta_t = 2.189 [sec])
-159.632 -159.332 (delta_t = 0.300 [sec])
-158.632 -155.502 (delta_t = 3.130 [sec])
-153.632 -153.582 (delta_t = 0.050 [sec])
-150.632 -149.032 (delta_t = 1.600 [sec])
-119.632 -56.987 (delta_t = 62.645 [sec])
-55.632 -0.444 (delta_t = 55.188 [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 -0.444 sec. to 43.580 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51246 ( -0.117446 0.117823 )
Norm@50keV : 3.39709E-03 ( -0.000222081 0.000221328 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.81 using 59 PHA bins.
# Reduced chi-squared = 0.8563 for 57 degrees of freedom
# Null hypothesis probability = 7.714913e-01
Photon flux (15-150 keV) in 44.02 sec: 0.425526 ( -0.0280728 0.0281366 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41577e-06 ( -1.01188e-07 1.01828e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.444 sec. to 43.580 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51627 ( -0.12236 0.11482 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.39579E-03 ( -0.00160231 0.00159508 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.83 using 59 PHA bins.
# Reduced chi-squared = 0.8720 for 56 degrees of freedom
# Null hypothesis probability = 7.404765e-01
Photon flux (15-150 keV) in 44.02 sec: 0.425679 ( -0.028155 0.027816 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41416e-06 ( -9.90846e-08 1.02258e-07 ) ergs/cm2
Band function
Time interval is from -0.444 sec. to 43.580 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.84232 ( -2.49308 -2.49308 )
beta : -1.53912 ( -0.139252 0.125909 )
Epeak [keV] : 21.9785 ( -23.8236 91.8333 )
Norm@50keV : 96.2664 ( -96.2661 2358.45 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.18 using 59 PHA bins.
# Reduced chi-squared = 0.8760 for 55 degrees of freedom
# Null hypothesis probability = 7.307580e-01
Photon flux (15-150 keV) in 44.02 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] : 14.3722 ( )
R^2/D10^2 : 5.39862E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 120.29 using 59 PHA bins.
# Reduced chi-squared = 2.1103 for 57 degrees of freedom
# Null hypothesis probability = 2.016082e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.034e-07 1.369e-08
25- 50 3.946e-07 3.768e-08
50-150 5.438e-07 7.219e-08
15-150 1.042e-06 8.012e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 1.73011 (-0.110679 0.110679)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.38 using 59 PHA bins.
# Reduced chi-squared = 0.9014 for 57 degrees of freedom
# Null hypothesis probability = 6.850271e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.902e-07 1.411e-08
25- 50 3.658e-07 2.910e-08
50-150 8.023e-07 2.018e-07
15-150 1.358e-06 2.183e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.23507 (-1.31595 1.38775)
R1^2/D10^2 : 0.293588 (-0.117517 0.230799)
kT2 [keV] : 40.3321 (-11.2798 29.5913)
R2^2/D10^2 : 1.33276E-03 (-0.000998219 0.00238499)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.23 using 59 PHA bins.
# Reduced chi-squared = 0.8587 for 55 degrees of freedom
# Null hypothesis probability = 7.625077e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.740e-07 3.414e-08
25- 50 3.813e-07 6.810e-08
50-150 8.941e-07 4.179e-07
15-150 1.449e-06 4.560e-07
Peak spectrum fit
Power-law model
Time interval is from 14.392 sec. to 15.392 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28409 ( -0.433627 0.412205 )
Norm@50keV : 6.36765E-03 ( -0.00142832 0.0014275 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.54 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 57 degrees of freedom
# Null hypothesis probability = 4.185642e-01
Photon flux (15-150 keV) in 1 sec: 0.757494 ( -0.175553 0.176137 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.31712e-08 ( -1.57123e-08 1.59891e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 14.392 sec. to 15.392 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.71765 ( )
Epeak [keV] : 219.105 ( )
Norm@50keV : 9.57478E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.47 using 59 PHA bins.
# Reduced chi-squared = 1.044 for 56 degrees of freedom
# Null hypothesis probability = 3.847989e-01
Photon flux (15-150 keV) in 1 sec: 0.760275 ( -0.177638 0.173423 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.27326e-08 ( -1.53845e-08 1.61297e-08 ) ergs/cm2
Band function
Time interval is from 14.392 sec. to 15.392 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.66962 ( -4.66962 -4.66962 )
beta : -1.60173 ( -0.791306 0.602047 )
Epeak [keV] : 34.9439 ( -34.9439 55.618 )
Norm@50keV : 51.1250 ( -11.4002 3.1986e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.07 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 55 degrees of freedom
# Null hypothesis probability = 3.627188e-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] : 14.0067 (-3.71571 6.66181)
R^2/D10^2 : 0.109333 (-0.080294 0.215724)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.89 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 57 degrees of freedom
# Null hypothesis probability = 2.209312e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.531e-09 2.181e-09
25- 50 1.686e-08 7.805e-09
50-150 2.178e-08 1.192e-08
15-150 4.317e-08 2.057e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-96.4961 -199.363)
Norm : 3.13629 (-0.712981 0.713005)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.10 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 57 degrees of freedom
# Null hypothesis probability = 3.640564e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.810e-09 4.633e-09
25- 50 1.502e-08 8.880e-09
50-150 3.295e-08 1.936e-08
15-150 5.578e-08 3.299e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.70702 (-2.49519 2.2292)
R1^2/D10^2 : 0.327842 (-0.173828 0.30442)
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 1.39382E-04 (-5.89487e-05 0.000352041)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.71 using 59 PHA bins.
#Fit statistic : Chi-Squared = 53.65 using 59 PHA bins.
# Reduced chi-squared = 0.9766 for 55 degrees of freedom
# Reduced chi-squared = 0.9754 for 55 degrees of freedom
# Null hypothesis probability = 5.238483e-01
# Null hypothesis probability = 5.265149e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.085e-09 3.673e-09
25- 50 1.633e-08 1.027e-08
50-150 4.317e-08 1.782e-08
15-150 6.559e-08 2.220e-08
Plot creation:
Tue Jun 4 22:04:45 EDT 2013