batgrbproduct Analysis for Trigger=557640
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): Fri Jun 7 18:51:39 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557640/GCN5_download_cron
======================================================================
Trigger: 00557640 Segment: 000
BAT Trigger Time: 392296657.344 [s; MET]
Trigger Stop: 392296657.352 [s; MET]
UTC: 2013-06-07T11:17:26.697900 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 266.432655517858 Dec: -28.992556134202 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.63
Image Trigger?: NO
Rate S/N Ratio: 30.8220700148449 [ if not an image trigger ]
Image S/N Ratio: 7.63
Flight Position: [ source = BAT ]
RA: 266.432655517858 Dec: -28.992556134202 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 266.448533257914 Dec: -29.0100380010464 [deg; J2000]
{ 17h 45m 47.6s , -29d 00' 36.1" }
+/- 2.39419466135558 [arcmin] (estimated 90% radius based on SNR)
+/- 1.23672542138614 [arcmin] (formal 1-sigma fit error)
SNR: 8.73900547275568
Angular difference between Flight and Ground position is 1.339572 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 0.00800001621246338 +/- 0.143108374017273
Measured from: 0
to: 0.00800001621246338 [s; relative to TRIGTIME]
T50: 0.00800001621246338 +/- 0.064
Measured from: 0
to: 0.00800001621246338 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.00800001621246338 second)
Measured from: 0
to: 0.00800001621246338 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.00800001621246338 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.008754 0.007149 0.003262 0.000108
0.001502 0.001508 0.000892 0.000248 [error]
Peak 0.008754 0.007149 0.003262 0.000108
0.001502 0.001508 0.000892 0.000248 [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 2.36e-09 1.40e-09 5.31e-10 2.68e-10 4.43e-09 4.56e-09 erg/cm2
Error 6.23e-10 4.83e-10 3.39e-10 3.34e-10 1.27e-09 1.37e-09 erg/cm2
Peak flux Power-law 9.89e+00 3.33e+00 6.31e-01 1.40e-01 1.39e+01 1.40e+01 ph/cm2/s
Error 2.65e+00 1.11e+00 3.92e-01 1.66e-01 3.54e+00 3.56e+00 ph/cm2/s
Fluence Cutoff-PL 2.39e-09 1.88e-09 3.16e-10 6.16e-12 4.59e-09 4.59e-09 erg/cm2
Error 6.80e-10 7.41e-10 3.92e-10 1.05e-10 1.25e-09 1.25e-09 erg/cm2
Peak flux Cutoff-PL 9.81e+00 4.49e+00 4.10e-01 4.31e-03 1.47e+01 1.47e+01 ph/cm2/s
Error 2.16e+00 1.69e+00 4.80e-01 6.02e-02 3.59e+00 3.59e+00 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 3.399 0.561 - - 3.74e-02 1.88e-02 43.360 57
CPL 0.744 0.000 15.3 0.0 2.40e+00 0.00e+00 40.060 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.399 0.561 - - 3.74e-02 1.88e-02 43.360 57
CPL 0.744 0.000 15.3 0.0 2.40e+00 0.00e+00 40.060 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 0.008 0.000 0.008
T90 0.008 0.000 0.008
T50 0.008 0.000 0.008
Peak 0.008 0.000 0.008
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.4485 -29.0100 0.0220 2.8 -175.9 0.0200 8.7 TRIG_00557640
------------------------------------------
Foreground time interval of the image:
0.000 0.008 (delta_t = 0.008 [sec])
Background time interval of the image:
-119.344 -1.344 (delta_t = 118.000 [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 0.000 sec. to 0.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.39921 ( -0.472587 0.649666 )
Norm@50keV : 3.73865E-02 ( -0.0183196 0.0193353 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.36 using 59 PHA bins.
# Reduced chi-squared = 0.7606 for 57 degrees of freedom
# Null hypothesis probability = 9.087565e-01
Photon flux (15-150 keV) in 0.008 sec: 13.9431 ( -3.543 3.54403 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.4299e-09 ( -1.25367e-09 1.27958e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.744281 ( )
Epeak [keV] : 15.2631 ( )
Norm@50keV : 2.40343 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.06 using 59 PHA bins.
# Reduced chi-squared = 0.7154 for 56 degrees of freedom
# Null hypothesis probability = 9.467277e-01
Photon flux (15-150 keV) in 0.008 sec: 14.7123 ( -3.5921 3.5946 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.59002e-09 ( -1.23027e-09 1.26175e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.949335 ( -0.563252 0.949341 )
beta : -9.37167 ( 9.37167 6.03394 )
Epeak [keV] : 14.1517 ( -4.5225 11.434 )
Norm@50keV : 1.68831 ( -1.68801 83.1587 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.08 using 59 PHA bins.
# Reduced chi-squared = 0.7287 for 55 degrees of freedom
# Null hypothesis probability = 9.346342e-01
Photon flux (15-150 keV) in 0.008 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] : 5.41652 (-1.23561 1.49775)
R^2/D10^2 : 89.1770 (-60.3044 210.727)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.03 using 59 PHA bins.
# Reduced chi-squared = 0.7198 for 57 degrees of freedom
# Null hypothesis probability = 9.452208e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.365e-09 1.380e-09
25- 50 1.872e-09 1.118e-09
50-150 1.105e-10 9.748e-11
15-150 4.347e-09 2.269e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.5386 (-5.89793 7.60008)
Norm : 232.824 (-100.118 213.187)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.19 using 59 PHA bins.
# Reduced chi-squared = 0.7052 for 57 degrees of freedom
# Null hypothesis probability = 9.552629e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.413e-09 8.924e-10
25- 50 1.802e-09 8.570e-10
50-150 3.845e-10 3.095e-10
15-150 4.600e-09 1.919e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.53423 (-3.53519 54.0812)
R1^2/D10^2 : 390.845 (-390.567 -390.567)
kT2 [keV] : 7.80707 (-7.81049 76.846)
R2^2/D10^2 : 10.3209 (-10.2957 213.435)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.96 using 59 PHA bins.
# Reduced chi-squared = 0.7266 for 55 degrees of freedom
# Null hypothesis probability = 9.363972e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.403e-09 1.390e-09
25- 50 1.875e-09 1.075e-09
50-150 3.647e-10 2.567e-10
15-150 4.643e-09 2.310e-09
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.39921 ( -0.472587 0.649666 )
Norm@50keV : 3.73865E-02 ( -0.0183196 0.0193353 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.36 using 59 PHA bins.
# Reduced chi-squared = 0.7606 for 57 degrees of freedom
# Null hypothesis probability = 9.087565e-01
Photon flux (15-150 keV) in 0.008 sec: 13.9431 ( -3.543 3.54403 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.4299e-09 ( -1.25367e-09 1.27958e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.744281 ( )
Epeak [keV] : 15.2631 ( )
Norm@50keV : 2.40343 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.06 using 59 PHA bins.
# Reduced chi-squared = 0.7154 for 56 degrees of freedom
# Null hypothesis probability = 9.467277e-01
Photon flux (15-150 keV) in 0.008 sec: 14.7123 ( -3.5921 3.5946 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.59002e-09 ( -1.23027e-09 1.26175e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.949335 ( -0.563252 0.949341 )
beta : -9.37167 ( 9.37167 6.03215 )
Epeak [keV] : 14.1517 ( -4.5225 11.434 )
Norm@50keV : 1.68831 ( -1.68801 83.1587 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.08 using 59 PHA bins.
# Reduced chi-squared = 0.7287 for 55 degrees of freedom
# Null hypothesis probability = 9.346342e-01
Photon flux (15-150 keV) in 0.008 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] : 5.41652 (-1.23561 1.49775)
R^2/D10^2 : 89.1770 (-60.3044 210.727)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.03 using 59 PHA bins.
# Reduced chi-squared = 0.7198 for 57 degrees of freedom
# Null hypothesis probability = 9.452208e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.365e-09 1.392e-09
25- 50 1.872e-09 1.118e-09
50-150 1.105e-10 9.907e-11
15-150 4.347e-09 2.049e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.5386 (-5.89793 7.60008)
Norm : 232.824 (-100.118 213.187)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.19 using 59 PHA bins.
# Reduced chi-squared = 0.7052 for 57 degrees of freedom
# Null hypothesis probability = 9.552629e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.413e-09 9.144e-10
25- 50 1.802e-09 8.850e-10
50-150 3.845e-10 3.262e-10
15-150 4.600e-09 1.762e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.53423 (-3.53519 52.1248)
R1^2/D10^2 : 390.845 (-390.567 -390.567)
kT2 [keV] : 7.80707 (-7.81049 86.2935)
R2^2/D10^2 : 10.3209 (-10.2957 213.435)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.96 using 59 PHA bins.
# Reduced chi-squared = 0.7266 for 55 degrees of freedom
# Null hypothesis probability = 9.363972e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.403e-09 1.363e-09
25- 50 1.875e-09 1.064e-09
50-150 3.647e-10 2.556e-10
15-150 4.643e-09 2.416e-09
Plot creation:
Fri Jun 7 18:56:36 EDT 2013