batgrbproduct Analysis for Trigger=557310
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 11:50:33 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557310/GCN5_download_cron
======================================================================
Trigger: 00557310 Segment: 000
BAT Trigger Time: 391967364.768 [s; MET]
Trigger Stop: 391967364.8 [s; MET]
UTC: 2013-06-03T15:49:14.136600 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 172.20866268286 Dec: 17.0451158220811 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17.27
Image Trigger?: NO
Rate S/N Ratio: 242.441745580253 [ if not an image trigger ]
Image S/N Ratio: 17.27
Flight Position: [ source = BAT ]
RA: 172.20866268286 Dec: 17.0451158220811 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 172.221706943278 Dec: 17.063400298901 [deg; J2000]
{ 11h 28m 53.2s , +17d 03' 48.2" }
+/- 0.716656188129077 [arcmin] (estimated 90% radius based on SNR)
+/- 0.236470229587442 [arcmin] (formal 1-sigma fit error)
SNR: 48.9572661597038
Angular difference between Flight and Ground position is 1.327939 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 0.175999999046326 +/- 0.0240000486373901
Measured from: 0.0120000839233398
to: 0.188000082969666 [s; relative to TRIGTIME]
T50: 0.059999942779541 +/- 0.00400000810623169
Measured from: 0.0240001082420349
to: 0.0840000510215759 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.364000022411346
to: 0.635999977588654 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.00800001621246338
to: 0.259999990463257 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.133251 0.277304 0.307640 0.123273
0.006681 0.009146 0.010284 0.008637 [error]
Peak 0.141004 0.284838 0.308744 0.124249
0.008401 0.010335 0.011165 0.009385 [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 3.68e-08 1.03e-07 2.32e-07 1.40e-06 6.27e-07 1.77e-06 erg/cm2
Error 2.75e-09 4.48e-09 9.63e-09 1.37e-07 2.64e-08 1.43e-07 erg/cm2
Peak flux Power-law 1.23e+00 1.83e+00 2.02e+00 4.22e+00 6.36e+00 9.30e+00 ph/cm2/s
Error 1.04e-01 9.14e-02 8.73e-02 4.13e-01 2.51e-01 4.50e-01 ph/cm2/s
Fluence Cutoff-PL 3.63e-08 1.03e-07 2.34e-07 1.28e-06 6.25e-07 1.65e-06 erg/cm2
Error 3.28e-09 4.83e-09 1.11e-08 2.97e-07 2.78e-08 2.96e-07 erg/cm2
Peak flux Cutoff-PL 1.23e+00 1.83e+00 2.02e+00 4.19e+00 6.36e+00 9.27e+00 ph/cm2/s
Error 1.06e-01 8.78e-02 9.52e-02 7.31e-01 2.50e-01 7.36e-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 0.823 0.066 - - 2.15e-01 7.80e-03 59.210 57
CPL 0.758 0.172 999.8 0.0 2.31e-01 4.90e-02 59.020 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.854 0.072 - - 5.54e-02 2.19e-03 58.170 57
CPL 0.847 0.151 9998.1 0.0 5.58e-02 8.90e-03 58.180 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: 0.128000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.252 0.008 0.260
T90 0.176 0.012 0.188
T50 0.060 0.024 0.084
Peak 1.000 -0.364 0.636
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
172.2217 +17.0634 0.0040 10.7 152.0 0.8613 49.0 TRIG_00557310
------------------------------------------
Foreground time interval of the image:
0.008 0.260 (delta_t = 0.252 [sec])
Background time interval of the image:
-60.768 -58.367 (delta_t = 2.401 [sec])
-56.768 0.008 (delta_t = 56.776 [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 0.008 sec. to 0.260 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.823114 ( -0.0657613 0.0652849 )
Norm@50keV : 0.214808 ( -0.00780976 0.00779955 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.21 using 59 PHA bins.
# Reduced chi-squared = 1.039 for 57 degrees of freedom
# Null hypothesis probability = 3.950086e-01
Photon flux (15-150 keV) in 0.252 sec: 24.6710 ( -0.891206 0.89125 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.26515e-07 ( -2.63486e-08 2.6434e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.008 sec. to 0.260 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.757530 ( -0.250242 0.0928899 )
Epeak [keV] : 999.784 ( -999.958 -999.958 )
Norm@50keV : 0.231330 ( -0.0337468 0.06435 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.02 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 56 degrees of freedom
# Null hypothesis probability = 3.657411e-01
Photon flux (15-150 keV) in 0.252 sec: 24.6115 ( -0.9168 0.9148 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.24564e-07 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.008 sec. to 0.260 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.949659 ( 0.949659 0.949659 )
beta : -0.823114 ( -0.0652813 0.0657692 )
Epeak [keV] : 13.8045 ( -13.8047 -13.8047 )
Norm@50keV : 0.312150 ( -0.105115 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.21 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 55 degrees of freedom
# Null hypothesis probability = 3.247514e-01
Photon flux (15-150 keV) in 0.252 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] : 23.4784 ( )
R^2/D10^2 : 0.745141 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 183.11 using 59 PHA bins.
# Reduced chi-squared = 3.2125 for 57 degrees of freedom
# Null hypothesis probability = 3.785407e-15
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.857e-08 1.425e-09
25- 50 1.019e-07 5.544e-09
50-150 4.192e-07 2.545e-08
15-150 5.397e-07 2.570e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 91.6048 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 360.52 using 59 PHA bins.
# Reduced chi-squared = 6.3249 for 57 degrees of freedom
# Null hypothesis probability = 1.159019e-45
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.748e-08 2.331e-09
25- 50 1.106e-07 4.448e-09
50-150 2.425e-07 9.500e-09
15-150 4.106e-07 1.714e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.5581 (-1.5343 1.70444)
R1^2/D10^2 : 4.83556 (-1.46175 2.35412)
kT2 [keV] : 51.8241 (-11.0166 23.7288)
R2^2/D10^2 : 6.60279E-02 (-0.0369005 0.0556703)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.36 using 59 PHA bins.
# Reduced chi-squared = 0.9338 for 55 degrees of freedom
# Null hypothesis probability = 6.144994e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.286e-08 5.509e-09
25- 50 1.099e-07 1.390e-08
50-150 4.830e-07 1.542e-07
15-150 6.258e-07 1.292e-07
Peak spectrum fit
Power-law model
Time interval is from -0.364 sec. to 0.636 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.853907 ( -0.0726457 0.0719785 )
Norm@50keV : 5.54457E-02 ( -0.00219365 0.00218887 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.17 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 57 degrees of freedom
# Null hypothesis probability = 4.318662e-01
Photon flux (15-150 keV) in 1 sec: 6.36443 ( -0.250501 0.250528 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.33711e-07 ( -2.83832e-08 2.85257e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.364 sec. to 0.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.847262 ( -0.197589 0.105218 )
Epeak [keV] : 9998.08 ( )
Norm@50keV : 5.58261E-02 ( -0.00217501 0.0156346 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.18 using 59 PHA bins.
# Reduced chi-squared = 1.039 for 56 degrees of freedom
# Null hypothesis probability = 3.948906e-01
Photon flux (15-150 keV) in 1 sec: 6.36310 ( -0.25093 0.25 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.33191e-07 ( -2.7022e-08 2.9049e-08 ) ergs/cm2
Band function
Time interval is from -0.364 sec. to 0.636 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -0.856572 ( -0.0723165 0.0730742 )
Epeak [keV] : 29.8375 ( -29.8375 2.54447 )
Norm@50keV : 1149.81 ( -44.7208 5.62992e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.52 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 55 degrees of freedom
# Null hypothesis probability = 4.178986e-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] : 23.6147 ( )
R^2/D10^2 : 0.186429 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 174.48 using 59 PHA bins.
# Reduced chi-squared = 3.0611 for 57 degrees of freedom
# Null hypothesis probability = 7.657684e-14
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.860e-08 1.545e-09
25- 50 1.024e-07 5.880e-09
50-150 4.259e-07 2.795e-08
15-150 5.469e-07 2.710e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 24.3762 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 295.21 using 59 PHA bins.
# Reduced chi-squared = 5.1791 for 57 degrees of freedom
# Null hypothesis probability = 7.534528e-34
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.070e-08 2.580e-09
25- 50 1.168e-07 5.400e-09
50-150 2.561e-07 1.145e-08
15-150 4.335e-07 2.270e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.4272 (-1.49655 1.66393)
R1^2/D10^2 : 1.35372 (-0.438076 0.721844)
kT2 [keV] : 53.7625 (-11.7713 26.2599)
R2^2/D10^2 : 1.56002E-02 (-0.00928977 0.0144237)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.51 using 59 PHA bins.
# Reduced chi-squared = 0.9365 for 55 degrees of freedom
# Null hypothesis probability = 6.087770e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.501e-08 6.085e-09
25- 50 1.141e-07 1.477e-08
50-150 4.937e-07 1.546e-07
15-150 6.429e-07 1.624e-07
Plot creation:
Tue Jun 4 11:57:24 EDT 2013