batgrbproduct Analysis for Trigger=556570
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): Sat May 25 03:13:32 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger556570/GCN5_download_cron
======================================================================
Trigger: 00556570 Segment: 000
BAT Trigger Time: 391108824 [s; MET]
Trigger Stop: 391109144 [s; MET]
UTC: 2013-05-24T17:20:13.406920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 244.895743054138 Dec: -15.8268749147367 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.12
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.12
Flight Position: [ source = BAT ]
RA: 244.895743054138 Dec: -15.8268749147367 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 244.953709606064 Dec: -15.7158133398289 [deg; J2000]
{ 16h 19m 48.9s , -15d 42' 56.9" }
+/- 4.04678043317376 [arcmin] (estimated 90% radius based on SNR)
+/- 3.57728906058646 [arcmin] (formal 1-sigma fit error)
SNR: 4.12875290442029
Angular difference between Flight and Ground position is 7.457053 arcmin
Partial Coding Fraction: 0.296875 [ including projection effects ]
Duration
T90: 306.175999939442 +/- 56.3263289604251
Measured from: 44.6240001320839
to: 350.800000071526 [s; relative to TRIGTIME]
T50: 174.487999916077 +/- 54.5358982456677
Measured from: 141.660000145435
to: 316.148000061512 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 59.0159999728203
to: 60.0159999728203 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.77600002288818
to: 403.832000017166 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 8.731969 1.070868 -0.254546 -0.232251
0.251656 0.227269 0.196618 0.174512 [error]
Peak 0.058689 0.024880 0.002884 0.022196
0.012969 0.011079 0.009882 0.008815 [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 2.96e-06 4.47e-07 3.10e-08 2.28e-09 3.44e-06 3.44e-06 erg/cm2
Error 3.20e-07 1.05e-07 1.79e-08 2.34e-09 3.31e-07 3.31e-07 erg/cm2
Peak flux Power-law 6.12e-01 1.86e-01 3.10e-02 5.95e-03 8.33e-01 8.35e-01 ph/cm2/s
Error 2.27e-01 1.53e-01 4.99e-02 2.33e-02 2.92e-01 2.94e-01 ph/cm2/s
Fluence Cutoff-PL 3.01e-06 6.08e-07 4.15e-08 1.31e-09 3.68e-06 3.67e-06 erg/cm2
Error 4.05e-07 2.68e-07 6.91e-08 1.07e-08 5.26e-07 5.26e-07 erg/cm2
Peak flux Cutoff-PL 6.19e-01 1.77e-01 2.77e-02 4.95e-03 8.23e-01 8.29e-01 ph/cm2/s
Error 2.26e-01 1.54e-01 3.33e-02 1.28e-02 2.56e-01 2.94e-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 5.853 0.488 - - 7.83e-05 3.66e-05 77.510 57
CPL 1.000 0.000 50.0 0.0 1.61e-03 0.00e+00 306.600 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.584 1.425 - - 1.92e-03 2.35e-03 59.470 57
CPL 1.000 0.000 50.0 0.0 1.42e-02 0.00e+00 67.950 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 408.608 -4.776 403.832
T90 306.176 44.624 350.800
T50 174.488 141.660 316.148
Peak 1.000 59.016 60.016
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
244.9537 -15.7158 0.0467 30.7 84.8 2.7887 4.1 TRIG_00556570
------------------------------------------
Foreground time interval of the image:
-4.776 397.301 (delta_t = 402.077 [sec])
Background time interval of the image:
-239.000 -4.776 (delta_t = 234.224 [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 -4.776 sec. to 403.832 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.85303 ( -0.477403 0.498466 )
Norm@50keV : 7.82932E-05 ( -3.00433e-05 4.31792e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.51 using 59 PHA bins.
# Reduced chi-squared = 1.360 for 57 degrees of freedom
# Null hypothesis probability = 3.672546e-02
Photon flux (15-150 keV) in 408.6 sec: 0.278112 ( -0.0283434 0.0284599 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.43895e-06 ( -3.30678e-07 3.3095e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.776 sec. to 403.832 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.60918E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 306.60 using 59 PHA bins.
# Reduced chi-squared = 5.4749 for 56 degrees of freedom
# Null hypothesis probability = 3.015387e-36
Photon flux (15-150 keV) in 408.6 sec: 0.274533 ( -0.029767 0.029351 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.67521e-06 ( -5.27212e-07 5.2508e-07 ) ergs/cm2
Band function
Time interval is from -4.776 sec. to 403.832 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.72022 ( 1.71985 1.71985 )
beta : -6.94403 ( 6.97135 1.54404 )
Epeak [keV] : 1.42656 ( -1.40988 10.2762 )
Norm@50keV : 0.187329 ( -0.126457 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.01 using 59 PHA bins.
# Reduced chi-squared = 1.400 for 55 degrees of freedom
# Null hypothesis probability = 2.668753e-02
Photon flux (15-150 keV) in 408.6 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] : 2.62072 (-0.234061 0.269715)
R^2/D10^2 : 93.9933 (-49.2709 103.63)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.88 using 59 PHA bins.
# Reduced chi-squared = 1.401 for 57 degrees of freedom
# Null hypothesis probability = 2.442497e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.947e-06 7.651e-07
25- 50 2.612e-07 8.436e-08
50-150 1.296e-10 9.937e-11
15-150 3.209e-06 7.351e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.70045 (-0.612087 0.772064)
Norm : 78.6401 (-35.8947 66.9424)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.44 using 59 PHA bins.
# Reduced chi-squared = 1.359 for 57 degrees of freedom
# Null hypothesis probability = 3.712519e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.967e-06 6.327e-07
25- 50 3.249e-07 9.232e-08
50-150 1.222e-09 8.977e-10
15-150 3.293e-06 7.326e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.73804 ( )
R1^2/D10^2 : 1397.51 (-1341.85 -1431.57)
kT2 [keV] : 3.42764 (-0.920465 8.7102)
R2^2/D10^2 : 9.37353 (-10.1485 89.4913)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.08 using 59 PHA bins.
#Fit statistic : Chi-Squared = 76.80 using 59 PHA bins.
# Reduced chi-squared = 1.765 for 55 degrees of freedom
# Reduced chi-squared = 1.396 for 55 degrees of freedom
# Null hypothesis probability = 4.028311e-04
# Null hypothesis probability = 2.769144e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.300e-06 1.365e-06
25- 50 5.063e-07 2.966e-07
50-150 2.092e-09 1.479e-09
15-150 2.809e-06 1.647e-06
Peak spectrum fit
Power-law model
Time interval is from 59.016 sec. to 60.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.58419 ( -1.13071 1.71897 )
Norm@50keV : 1.92210E-03 ( -0.00192156 0.00277578 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.47 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 57 degrees of freedom
# Null hypothesis probability = 3.859215e-01
Photon flux (15-150 keV) in 1 sec: 0.832726 ( -0.292076 0.292085 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.18729e-08 ( -1.37477e-08 1.72667e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 59.016 sec. to 60.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.42139E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.95 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 56 degrees of freedom
# Null hypothesis probability = 1.314238e-01
Photon flux (15-150 keV) in 1 sec: 0.823034 ( -0.283684 0.227386 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.0999e-08 ( -1.58419e-08 1.74048e-08 ) ergs/cm2
Band function
Time interval is from 59.016 sec. to 60.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.91189 ( 9.91189 9.91189 )
beta : -3.58442 ( -1.72061 1.13083 )
Epeak [keV] : 3.21254 ( -3.21254 -3.21254 )
Norm@50keV : 0.261187 ( -0.261163 0.377273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.47 using 59 PHA bins.
# Reduced chi-squared = 1.081 for 55 degrees of freedom
# Null hypothesis probability = 3.163282e-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] : 3.41768 (-1.06197 1.72732)
R^2/D10^2 : 49.0890 (-49.089 448.091)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.68 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 57 degrees of freedom
# Null hypothesis probability = 3.446418e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.974e-08 1.132e-08
25- 50 4.438e-09 3.032e-09
50-150 1.925e-11 2.072e-11
15-150 2.419e-08 1.512e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.95496 (-4.56836 18.8065)
Norm : 34.6481 (-34.584 210.647)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.39 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 57 degrees of freedom
# Null hypothesis probability = 3.542522e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.897e-08 1.112e-08
25- 50 6.999e-09 5.035e-09
50-150 3.505e-10 4.000e-10
15-150 2.632e-08 1.614e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.97231 (-0.646232 1.53413)
R1^2/D10^2 : 99.0694 (-99.0702 2821.14)
kT2 [keV] : 15.4698 (-15.4698 -15.4698)
R2^2/D10^2 : 2.96385E-02 (-0.0296385 0.372985)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.14 using 59 PHA bins.
# Reduced chi-squared = 1.057 for 55 degrees of freedom
# Null hypothesis probability = 3.603825e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.896e-08 1.148e-08
25- 50 8.501e-09 5.210e-09
50-150 9.963e-09 7.320e-09
15-150 3.742e-08 2.028e-08
Plot creation:
Sat May 25 03:22:07 EDT 2013