batgrbproduct Analysis for Trigger=555821
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 May 14 20:49:28 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger555821/GCN5_download_cron
======================================================================
Trigger: 00555821 Segment: 000
BAT Trigger Time: 390208431.616 [s; MET]
Trigger Stop: 390208432.64 [s; MET]
UTC: 2013-05-14T07:13:41.062760 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 296.273538001706 Dec: -7.95591954664214 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.13
Image Trigger?: NO
Rate S/N Ratio: 17.2916164657906 [ if not an image trigger ]
Image S/N Ratio: 10.13
Flight Position: [ source = BAT ]
RA: 296.273538001706 Dec: -7.95591954664214 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 296.278397011019 Dec: -7.97392124812967 [deg; J2000]
{ 19h 45m 06.8s , -07d 58' 26.1" }
+/- 0.837040683078612 [arcmin] (estimated 90% radius based on SNR)
+/- 0.284483492255818 [arcmin] (formal 1-sigma fit error)
SNR: 39.2175471648621
Angular difference between Flight and Ground position is 1.118027 arcmin
Partial Coding Fraction: 0.6015625 [ including projection effects ]
Duration
T90: 191.703999936581 +/- 12.8126975867004
Measured from: 0.860000133514404
to: 192.564000070095 [s; relative to TRIGTIME]
T50: 101.819999933243 +/- 2.78974691302931
Measured from: 14.7440001368523
to: 116.564000070095 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 13.4240000247955
to: 14.4240000247955 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.08799999952316
to: 257.931999981403 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.860965 5.746995 3.741735 0.826727
0.112974 0.111463 0.095029 0.079365 [error]
Peak 0.085598 0.122836 0.102704 0.031515
0.010284 0.010444 0.009242 0.006881 [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 1.68e-06 2.57e-06 2.96e-06 6.52e-06 9.14e-06 1.37e-05 erg/cm2
Error 8.63e-08 7.48e-08 1.03e-07 5.13e-07 2.45e-07 5.71e-07 erg/cm2
Peak flux Power-law 9.10e-01 9.37e-01 6.80e-01 7.93e-01 2.84e+00 3.32e+00 ph/cm2/s
Error 1.47e-01 9.40e-02 7.48e-02 1.78e-01 2.67e-01 3.03e-01 ph/cm2/s
Fluence Cutoff-PL 1.62e-06 2.60e-06 2.99e-06 5.29e-06 9.04e-06 1.25e-05 erg/cm2
Error 8.42e-08 8.10e-08 1.10e-07 1.34e-06 2.83e-07 1.38e-06 erg/cm2
Peak flux Cutoff-PL 8.63e-01 9.64e-01 7.00e-01 4.47e-01 2.81e+00 3.10e+00 ph/cm2/s
Error 1.72e-01 1.09e-01 8.57e-02 2.76e-01 2.73e-01 4.19e-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 1.798 0.052 - - 3.75e-03 9.92e-05 35.690 57
CPL 1.646 0.193 122.9 -40.2 4.42e-03 9.09e-04 34.010 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.462 0.153 - - 2.29e-02 2.10e-03 61.740 57
CPL 1.173 0.506 146.9 0.0 3.20e-02 0.00e+00 61.010 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: 130.944000 sec.
T50 in the 50-300 keV band: 35.072000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 265.020 -7.088 257.932
T90 191.704 0.860 192.564
T50 101.820 14.744 116.564
Peak 1.000 13.424 14.424
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
296.2784 -7.9739 0.0049 35.1 -142.3 3.3998 39.2 TRIG_00555821
------------------------------------------
Foreground time interval of the image:
-7.088 13.385 (delta_t = 20.473 [sec])
Background time interval of the image:
-214.415 -7.088 (delta_t = 207.327 [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 -7.088 sec. to 257.932 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.79843 ( -0.0517369 0.0519698 )
Norm@50keV : 3.74611E-03 ( -9.92568e-05 9.91244e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.69 using 59 PHA bins.
# Reduced chi-squared = 0.6261 for 57 degrees of freedom
# Null hypothesis probability = 9.879133e-01
Photon flux (15-150 keV) in 265 sec: 0.515893 ( -0.0155876 0.015666 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.13953e-06 ( -2.4537e-07 2.45619e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.088 sec. to 257.932 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64629 ( -0.208636 0.17726 )
Epeak [keV] : 122.924 ( -42.5651 -122.923 )
Norm@50keV : 4.41779E-03 ( -0.000727965 0.00108978 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.01 using 59 PHA bins.
# Reduced chi-squared = 0.6074 for 56 degrees of freedom
# Null hypothesis probability = 9.911249e-01
Photon flux (15-150 keV) in 265 sec: 0.508777 ( -0.017887 0.018014 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.03533e-06 ( -2.83285e-07 2.82198e-07 ) ergs/cm2
Band function
Time interval is from -7.088 sec. to 257.932 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.64628 ( 1.41867 1.41867 )
beta : -9.98403 ( 9.85403 19.854 )
Epeak [keV] : 122.900 ( -31.8239 -122.9 )
Norm@50keV : 4.41690E-03 ( -0.000439755 0.000512425 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.01 using 59 PHA bins.
# Reduced chi-squared = 0.6184 for 55 degrees of freedom
# Null hypothesis probability = 9.883234e-01
Photon flux (15-150 keV) in 265 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] : 14.2082 ( )
R^2/D10^2 : 6.19122E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 372.03 using 59 PHA bins.
# Reduced chi-squared = 6.5268 for 57 degrees of freedom
# Null hypothesis probability = 8.680891e-48
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.986e-07 3.723e-08
25- 50 2.636e-06 9.898e-08
50-150 3.531e-06 1.749e-07
15-150 6.865e-06 1.974e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 123.970 ( )
Norm : 2.10169 (-0.0729056 0.108751)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.90 using 59 PHA bins.
# Reduced chi-squared = 0.7351 for 57 degrees of freedom
# Null hypothesis probability = 9.330748e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.427e-06 8.652e-08
25- 50 2.580e-06 1.100e-07
50-150 4.742e-06 1.035e-06
15-150 8.749e-06 1.097e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.85719 (-0.608266 0.635123)
R1^2/D10^2 : 0.639165 (-0.176537 0.269876)
kT2 [keV] : 24.9084 (-2.14989 2.69458)
R2^2/D10^2 : 6.09479E-03 (-0.00196576 0.00256695)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.17 using 59 PHA bins.
# Reduced chi-squared = 0.7485 for 55 degrees of freedom
# Null hypothesis probability = 9.168358e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.426e-06 1.243e-07
25- 50 2.634e-06 1.313e-07
50-150 4.799e-06 3.233e-07
15-150 8.859e-06 4.956e-07
Peak spectrum fit
Power-law model
Time interval is from 13.424 sec. to 14.424 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46153 ( -0.153486 0.153493 )
Norm@50keV : 2.29415E-02 ( -0.00209924 0.00209272 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.74 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 57 degrees of freedom
# Null hypothesis probability = 3.105540e-01
Photon flux (15-150 keV) in 1 sec: 2.83539 ( -0.266739 0.267262 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.19074e-07 ( -2.15864e-08 2.16961e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 13.424 sec. to 14.424 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17328 ( -0.641348 0.370624 )
Epeak [keV] : 146.883 ( )
Norm@50keV : 3.19945E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.01 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 56 degrees of freedom
# Null hypothesis probability = 3.006448e-01
Photon flux (15-150 keV) in 1 sec: 2.80609 ( -0.27301 0.2732 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.15685e-07 ( -2.3387e-08 2.3242e-08 ) ergs/cm2
Band function
Time interval is from 13.424 sec. to 14.424 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.90893 ( -13.7331 -4.90893 )
beta : -1.59705 ( -0.228484 0.18464 )
Epeak [keV] : 27.5622 ( -10.4138 10.4138 )
Norm@50keV : 1133.92 ( -101.985 7800.24 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.06 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 55 degrees of freedom
# Null hypothesis probability = 3.633607e-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] : 15.6824 (-1.82516 2.10058)
R^2/D10^2 : 0.278235 (-0.0994425 0.15248)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.60 using 59 PHA bins.
# Reduced chi-squared = 1.589 for 57 degrees of freedom
# Null hypothesis probability = 3.066346e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.421e-08 2.385e-09
25- 50 5.876e-08 8.720e-09
50-150 1.002e-07 1.819e-08
15-150 1.732e-07 2.045e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 11.7298 (-1.06155 1.06148)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.07 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 57 degrees of freedom
# Null hypothesis probability = 3.001610e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.921e-08 8.605e-09
25- 50 5.619e-08 1.046e-08
50-150 1.232e-07 4.611e-08
15-150 2.086e-07 7.004e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.61709 (-1.76694 2.30413)
R1^2/D10^2 : 2.29316 (-1.28748 3.27356)
kT2 [keV] : 29.7776 (-7.50252 21.2638)
R2^2/D10^2 : 2.33410E-02 (-0.0189469 0.0304976)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.85 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 55 degrees of freedom
# Null hypothesis probability = 3.363978e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.639e-08 1.178e-08
25- 50 5.713e-08 2.177e-08
50-150 1.339e-07 6.450e-08
15-150 2.175e-07 8.123e-08
Plot creation:
Tue May 14 21:12:36 EDT 2013