batgrbproduct Analysis for Trigger=557845
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 11 07:12:18 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557845/GCN5_download_cron
======================================================================
Trigger: 00557845 Segment: 000
BAT Trigger Time: 392526744 [s; MET]
Trigger Stop: 392526808 [s; MET]
UTC: 2013-06-10T03:12:13.343620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 224.415905357673 Dec: 28.1911682712337 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 19.34
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 19.34
Flight Position: [ source = BAT ]
RA: 224.415905357673 Dec: 28.1911682712337 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 224.413662145216 Dec: 28.1871597323147 [deg; J2000]
{ 14h 57m 39.3s , +28d 11' 13.8" }
+/- 2.38812820403116 [arcmin] (estimated 90% radius based on SNR)
+/- 1.38883600289727 [arcmin] (formal 1-sigma fit error)
SNR: 8.77073603050238
Angular difference between Flight and Ground position is 0.268177 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 46.4159999489784 +/- 11.1468641255641
Measured from: -2.50799989700317
to: 43.9080000519753 [s; relative to TRIGTIME]
T50: 13.4359999299049 +/- 2.2004508837883
Measured from: 1.5320001244545
to: 14.9680000543594 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.53200000524521
to: 5.53200000524521 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.04000002145767
to: 61.0159999728203 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.849372 1.389895 1.181141 0.308371
0.050153 0.052664 0.048131 0.041747 [error]
Peak 0.039164 0.085824 0.075314 0.006200
0.006809 0.007329 0.007059 0.005732 [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 2.62e-07 5.55e-07 9.23e-07 3.49e-06 2.54e-06 5.23e-06 erg/cm2
Error 2.15e-08 2.68e-08 4.70e-08 4.04e-07 1.18e-07 4.31e-07 erg/cm2
Peak flux Power-law 4.50e-01 5.44e-01 4.77e-01 7.16e-01 1.72e+00 2.19e+00 ph/cm2/s
Error 7.97e-02 6.02e-02 5.47e-02 1.69e-01 1.71e-01 2.31e-01 ph/cm2/s
Fluence Cutoff-PL 2.49e-07 5.66e-07 9.41e-07 2.46e-06 2.50e-06 4.22e-06 erg/cm2
Error 2.60e-08 3.01e-08 5.24e-08 8.67e-07 1.29e-07 8.64e-07 erg/cm2
Peak flux Cutoff-PL 3.71e-01 5.92e-01 5.18e-01 2.76e-01 1.66e+00 1.76e+00 ph/cm2/s
Error 9.57e-02 7.35e-02 6.57e-02 1.97e-01 1.78e-01 2.60e-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 1.91e+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 1.267 0.076 - - 3.75e-03 1.57e-04 60.750 57
CPL 1.026 0.284 217.1 -62.8 4.87e-03 1.50e-03 58.620 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.192 0.162 - - 1.47e-02 1.44e-03 75.280 57
CPL 0.202 0.798 93.7 65.3 4.49e-02 4.89e-02 69.410 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: 25.152000 sec.
T50 in the 50-300 keV band: 8.704000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 68.056 -7.040 61.016
T90 46.416 -2.508 43.908
T50 13.436 1.532 14.968
Peak 1.000 4.532 5.532
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
224.4137 +28.1872 0.0219 21.9 -167.1 2.9389 8.8 TRIG_00557845
------------------------------------------
Foreground time interval of the image:
-7.040 61.016 (delta_t = 68.056 [sec])
Background time interval of the image:
-12.499 -7.040 (delta_t = 5.459 [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 -7.040 sec. to 61.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26682 ( -0.0763382 0.0759252 )
Norm@50keV : 3.74656E-03 ( -0.000157444 0.000157444 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.75 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 57 degrees of freedom
# Null hypothesis probability = 3.424388e-01
Photon flux (15-150 keV) in 68.06 sec: 0.444357 ( -0.0194809 0.0195105 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.54081e-06 ( -1.17866e-07 1.18259e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.040 sec. to 61.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02647 ( -0.300821 0.26711 )
Epeak [keV] : 217.073 ( -91.5284 -217.073 )
Norm@50keV : 4.87029E-03 ( -0.00118176 0.00182393 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.62 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 56 degrees of freedom
# Null hypothesis probability = 3.797345e-01
Photon flux (15-150 keV) in 68.06 sec: 0.438709 ( -0.02052 0.020523 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49854e-06 ( -1.29607e-07 1.28858e-07 ) ergs/cm2
Band function
Time interval is from -7.040 sec. to 61.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99195 ( -14.9073 -4.99195 )
beta : -1.34413 ( -0.0879511 0.0864056 )
Epeak [keV] : 26.9693 ( -3.852 2.97229 )
Norm@50keV : 201.762 ( -8.4579 317.449 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.26 using 59 PHA bins.
# Reduced chi-squared = 0.9684 for 55 degrees of freedom
# Null hypothesis probability = 5.412443e-01
Photon flux (15-150 keV) in 68.06 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] : 18.0370 ( )
R^2/D10^2 : 2.77087E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 167.83 using 59 PHA bins.
# Reduced chi-squared = 2.9445 for 57 degrees of freedom
# Null hypothesis probability = 7.435861e-13
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.228e-07 1.086e-08
25- 50 5.686e-07 3.515e-08
50-150 1.344e-06 1.072e-07
15-150 2.035e-06 1.086e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 1.85278 (-0.0788542 0.0788358)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.94 using 59 PHA bins.
# Reduced chi-squared = 1.718 for 57 degrees of freedom
# Null hypothesis probability = 6.076016e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.140e-07 1.412e-08
25- 50 6.039e-07 2.821e-08
50-150 1.325e-06 5.989e-08
15-150 2.242e-06 1.041e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.51322 (-1.19535 1.3014)
R1^2/D10^2 : 0.215901 (-0.0754328 0.131177)
kT2 [keV] : 34.1727 (-5.50105 9.04785)
R2^2/D10^2 : 2.74621E-03 (-0.00141387 0.00218584)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.83 using 59 PHA bins.
# Reduced chi-squared = 0.9787 for 55 degrees of freedom
# Null hypothesis probability = 5.193624e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.323e-07 3.263e-08
25- 50 5.942e-07 7.473e-08
50-150 1.704e-06 4.152e-07
15-150 2.530e-06 4.223e-07
Peak spectrum fit
Power-law model
Time interval is from 4.532 sec. to 5.532 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19195 ( -0.162424 0.161005 )
Norm@50keV : 1.46880E-02 ( -0.00143934 0.00143882 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.28 using 59 PHA bins.
# Reduced chi-squared = 1.321 for 57 degrees of freedom
# Null hypothesis probability = 5.283790e-02
Photon flux (15-150 keV) in 1 sec: 1.72214 ( -0.170726 0.170889 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49355e-07 ( -1.64297e-08 1.65836e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.532 sec. to 5.532 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.202478 ( -0.877418 0.718664 )
Epeak [keV] : 93.7099 ( -23.216 107.412 )
Norm@50keV : 4.49498E-02 ( -0.0246166 0.0731002 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.41 using 59 PHA bins.
# Reduced chi-squared = 1.240 for 56 degrees of freedom
# Null hypothesis probability = 1.074200e-01
Photon flux (15-150 keV) in 1 sec: 1.65853 ( -0.17827 0.17757 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39058e-07 ( -1.8418e-08 1.8475e-08 ) ergs/cm2
Band function
Time interval is from 4.532 sec. to 5.532 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.389842 ( -1.17586 -0.405959 )
beta : -1.73087 ( 1.73059 0.448446 )
Epeak [keV] : 68.4803 ( -31.5938 95.0085 )
Norm@50keV : 0.100989 ( -0.108319 73.6726 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.43 using 59 PHA bins.
# Reduced chi-squared = 1.244 for 55 degrees of freedom
# Null hypothesis probability = 1.053490e-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] : 17.3717 (-1.97025 2.30491)
R^2/D10^2 : 0.129578 (-0.0440401 0.0641074)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.65 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 57 degrees of freedom
# Null hypothesis probability = 3.584914e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.915e-09 1.545e-09
25- 50 3.562e-08 4.895e-09
50-150 7.727e-08 1.608e-08
15-150 1.208e-07 1.620e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 7.04302 (-0.701286 0.701264)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.05 using 59 PHA bins.
# Reduced chi-squared = 1.492 for 57 degrees of freedom
# Null hypothesis probability = 9.399955e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.754e-08 9.645e-09
25- 50 3.374e-08 1.833e-08
50-150 7.400e-08 4.039e-08
15-150 1.253e-07 6.100e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.9077 (-4.42048 4.29801)
R1^2/D10^2 : 0.374267 (-0.191557 0.865398)
kT2 [keV] : 33.4224 (-28.5771 -35.1248)
R2^2/D10^2 : 9.78040E-03 (-0.00752763 0.0540642)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.36 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 55 degrees of freedom
# Null hypothesis probability = 1.065194e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.088e-08 5.472e-09
25- 50 3.624e-08 1.938e-08
50-150 9.436e-08 5.014e-08
15-150 1.415e-07 6.915e-08
Plot creation:
Tue Jun 11 07:30:29 EDT 2013