batgrbproduct Analysis for Trigger=556870
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 May 29 11:10:57 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger556870/GCN5_download_cron
======================================================================
Trigger: 00556870 Segment: 000
BAT Trigger Time: 391452094.528 [s; MET]
Trigger Stop: 391452095.04 [s; MET]
UTC: 2013-05-28T16:41:23.919600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 138.910917852021 Dec: 87.2757530719287 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.71
Image Trigger?: NO
Rate S/N Ratio: 20.8326666559997 [ if not an image trigger ]
Image S/N Ratio: 9.71
Flight Position: [ source = BAT ]
RA: 138.910917852021 Dec: 87.2757530719287 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 139.404792911949 Dec: 87.3004295631328 [deg; J2000]
{ 09h 17m 37.2s , +87d 18' 01.5" }
+/- 0.642374679724852 [arcmin] (estimated 90% radius based on SNR)
+/- 0.176270236983183 [arcmin] (formal 1-sigma fit error)
SNR: 57.2408876357184
Angular difference between Flight and Ground position is 2.039067 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 59.3999999761581 +/- 3.5477232088438
Measured from: 1.72800010442734
to: 61.1280000805855 [s; relative to TRIGTIME]
T50: 40.3719999790192 +/- 0.767885409983051
Measured from: 7.34000009298325
to: 47.7120000720024 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.05599999427795
to: 7.05599999427795 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.120000004768372
to: 79.3360000252724 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.656877 3.385198 2.322493 0.474820
0.055420 0.058327 0.051164 0.042682 [error]
Peak 0.053464 0.127815 0.155940 0.047600
0.006603 0.008046 0.008143 0.005958 [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 8.44e-07 1.40e-06 1.77e-06 4.44e-06 5.25e-06 8.46e-06 erg/cm2
Error 4.00e-08 3.76e-08 5.50e-08 3.16e-07 1.31e-07 3.46e-07 erg/cm2
Peak flux Power-law 5.74e-01 8.51e-01 9.43e-01 1.97e+00 2.97e+00 4.34e+00 ph/cm2/s
Error 7.51e-02 6.82e-02 6.16e-02 2.78e-01 1.87e-01 3.11e-01 ph/cm2/s
Fluence Cutoff-PL 7.92e-07 1.42e-06 1.80e-06 3.08e-06 5.14e-06 7.10e-06 erg/cm2
Error 5.21e-08 4.09e-08 5.97e-08 7.57e-07 1.52e-07 7.74e-07 erg/cm2
Peak flux Cutoff-PL 4.93e-01 8.70e-01 1.01e+00 1.21e+00 2.91e+00 3.58e+00 ph/cm2/s
Error 9.61e-02 7.42e-02 8.15e-02 4.81e-01 1.92e-01 5.11e-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 1.666 0.047 - - 7.14e-03 1.71e-04 48.600 57
CPL 1.394 0.191 118.3 79.7 9.58e-03 1.94e-03 42.310 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.852 0.106 - - 2.58e-02 1.64e-03 66.190 57
CPL 0.316 0.464 187.4 274.4 4.39e-02 2.04e-02 61.740 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: 52.864000 sec.
T50 in the 50-300 keV band: 23.872000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 79.216 0.120 79.336
T90 59.400 1.728 61.128
T50 40.372 7.340 47.712
Peak 1.000 6.056 7.056
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
139.4048 +87.3004 0.0034 18.3 -9.4 2.5774 57.2 TRIG_00556870
------------------------------------------
Foreground time interval of the image:
0.120 8.173 (delta_t = 8.053 [sec])
Background time interval of the image:
-60.528 0.120 (delta_t = 60.648 [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 0.120 sec. to 79.336 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66610 ( -0.0468788 0.0469912 )
Norm@50keV : 7.14264E-03 ( -0.000171257 0.000171191 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.60 using 59 PHA bins.
# Reduced chi-squared = 0.8526 for 57 degrees of freedom
# Null hypothesis probability = 7.781697e-01
Photon flux (15-150 keV) in 79.22 sec: 0.937663 ( -0.025168 0.0252644 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.25434e-06 ( -1.30909e-07 1.311e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.120 sec. to 79.336 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39374 ( -0.195014 0.186953 )
Epeak [keV] : 118.339 ( -28.3879 131.041 )
Norm@50keV : 9.57572E-03 ( -0.00170342 0.00217721 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.31 using 59 PHA bins.
# Reduced chi-squared = 0.7556 for 56 degrees of freedom
# Null hypothesis probability = 9.118593e-01
Photon flux (15-150 keV) in 79.22 sec: 0.915860 ( -0.028747 0.028906 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.14317e-06 ( -1.52055e-07 1.51611e-07 ) ergs/cm2
Band function
Time interval is from 0.120 sec. to 79.336 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.39372 ( -0.162533 0.134067 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 118.316 ( -18.2151 130.885 )
Norm@50keV : 9.57441E-03 ( -0.00170285 0.00217815 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.31 using 59 PHA bins.
# Reduced chi-squared = 0.7693 for 55 degrees of freedom
# Null hypothesis probability = 8.948294e-01
Photon flux (15-150 keV) in 79.22 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] : 15.0926 ( )
R^2/D10^2 : 9.47746E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 383.75 using 59 PHA bins.
# Reduced chi-squared = 6.7325 for 57 degrees of freedom
# Null hypothesis probability = 5.764322e-50
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.577e-07 1.881e-08
25- 50 1.429e-06 4.397e-08
50-150 2.222e-06 1.014e-07
15-150 4.009e-06 1.109e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 160.629 ( )
Norm : 3.78941 (-0.115145 0.12468)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.39 using 59 PHA bins.
# Reduced chi-squared = 0.7612 for 57 degrees of freedom
# Null hypothesis probability = 9.081973e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.607e-07 3.664e-08
25- 50 1.425e-06 7.764e-08
50-150 2.895e-06 6.274e-07
15-150 5.081e-06 7.062e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.00954 (-0.628496 0.666539)
R1^2/D10^2 : 0.980636 (-0.267069 0.402316)
kT2 [keV] : 25.0537 (-1.99951 2.50864)
R2^2/D10^2 : 1.21485E-02 (-0.00367078 0.00458742)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.01 using 59 PHA bins.
# Reduced chi-squared = 0.8366 for 55 degrees of freedom
# Null hypothesis probability = 8.006619e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.189e-07 6.044e-08
25- 50 1.438e-06 7.011e-08
50-150 2.910e-06 1.775e-07
15-150 5.068e-06 2.495e-07
Peak spectrum fit
Power-law model
Time interval is from 6.056 sec. to 7.056 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.851968 ( -0.10746 0.105456 )
Norm@50keV : 2.58334E-02 ( -0.00163821 0.00163238 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.19 using 59 PHA bins.
# Reduced chi-squared = 1.161 for 57 degrees of freedom
# Null hypothesis probability = 1.893310e-01
Photon flux (15-150 keV) in 1 sec: 2.96539 ( -0.18667 0.186825 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.95489e-07 ( -1.98598e-08 1.99193e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.056 sec. to 7.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.316204 ( -0.48972 0.437572 )
Epeak [keV] : 187.405 ( -61.7481 486.954 )
Norm@50keV : 4.38907E-02 ( -0.015127 0.025762 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.74 using 59 PHA bins.
# Reduced chi-squared = 1.102 for 56 degrees of freedom
# Null hypothesis probability = 2.785432e-01
Photon flux (15-150 keV) in 1 sec: 2.91433 ( -0.19168 0.19145 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90116e-07 ( -2.0921e-08 2.0787e-08 ) ergs/cm2
Band function
Time interval is from 6.056 sec. to 7.056 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.809271 ( 0.809253 0.809253 )
beta : -0.851969 ( -0.105455 0.107462 )
Epeak [keV] : 16.6040 ( )
Norm@50keV : 3.67422E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.19 using 59 PHA bins.
# Reduced chi-squared = 1.204 for 55 degrees of freedom
# Null hypothesis probability = 1.434386e-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] : 24.2817 (-1.96259 2.2266)
R^2/D10^2 : 8.26193E-02 (-0.0192329 0.0241914)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.33 using 59 PHA bins.
# Reduced chi-squared = 1.497 for 57 degrees of freedom
# Null hypothesis probability = 8.918365e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.592e-09 1.029e-09
25- 50 4.801e-08 4.620e-09
50-150 2.107e-07 1.890e-08
15-150 2.673e-07 1.915e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 11.4879 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 176.38 using 59 PHA bins.
# Reduced chi-squared = 3.0944 for 57 degrees of freedom
# Null hypothesis probability = 3.971699e-14
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.861e-08 2.335e-09
25- 50 5.503e-08 5.555e-09
50-150 1.207e-07 3.853e-08
15-150 2.043e-07 3.860e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.78947 (-3.31558 4.79369)
R1^2/D10^2 : 0.723448 (-0.464718 2.45531)
kT2 [keV] : 33.2014 (-5.92406 17.4652)
R2^2/D10^2 : 2.81449E-02 (-0.0208359 0.0260016)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.26 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 55 degrees of freedom
# Null hypothesis probability = 2.336004e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.529e-08 6.511e-09
25- 50 5.120e-08 1.687e-08
50-150 2.248e-07 7.746e-08
15-150 2.913e-07 8.615e-08
Plot creation:
Wed May 29 11:23:40 EDT 2013