batgrbproduct Analysis for Trigger=559221
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 Jun 29 13:57:46 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger559221/batgroup_hand_proc
======================================================================
Trigger: 00559221 Segment: 000
BAT Trigger Time: 394097192 [s; MET]
Trigger Stop: 394097256 [s; MET]
UTC: 2013-06-28T07:26:21.273520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 268.712971815106 Dec: -26.2888389113932 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.02
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.02
Flight Position: [ source = BAT ]
RA: 268.712971815106 Dec: -26.2888389113932 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 268.682442351178 Dec: -26.3286435422431 [deg; J2000]
{ 17h 54m 43.8s , -26d 19' 43.1" }
+/- 2.96647516969871 [arcmin] (estimated 90% radius based on SNR)
+/- 1.67271075232184 [arcmin] (formal 1-sigma fit error)
SNR: 6.43411447486893
Angular difference between Flight and Ground position is 2.898299 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 169.259999930859 +/- 41.5252731369446
Measured from: -119.251999974251
to: 50.0079999566078 [s; relative to TRIGTIME]
T50: 75.62399995327 +/- 52.6958108784547
Measured from: -96.4480000138283
to: -20.8240000605583 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -119.708000004292
to: -118.708000004292 [s; relative to TRIGTIME]
Total Fluence
Measured from: -121.06400001049
to: 72.9240000247955 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.111642 0.520195 0.027246 0.055867
0.102240 0.090875 0.076470 0.066525 [error]
Peak 0.024256 0.017384 0.010970 0.013389
0.012506 0.010907 0.009302 0.008418 [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 3.22e-07 1.82e-07 6.52e-08 3.07e-08 5.86e-07 6.00e-07 erg/cm2
Error 5.41e-08 5.02e-08 4.01e-08 3.98e-08 1.15e-07 1.30e-07 erg/cm2
Peak flux Power-law 1.60e-01 1.45e-01 9.03e-02 8.61e-02 4.31e-01 4.81e-01 ph/cm2/s
Error 1.62e-01 1.15e-01 8.34e-02 2.35e-01 3.42e-01 2.80e-01 ph/cm2/s
Fluence Cutoff-PL 3.22e-07 1.83e-07 6.42e-08 2.77e-08 5.84e-07 5.96e-07 erg/cm2
Error 5.42e-08 5.26e-08 4.48e-08 3.12e-08 1.24e-07 1.39e-07 erg/cm2
Peak flux Cutoff-PL 1.70e-01 1.46e-01 8.65e-02 7.70e-02 4.34e-01 4.74e-01 ph/cm2/s
Error 1.29e-01 8.77e-02 8.35e-02 2.22e-01 3.42e-01 2.76e-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 3.483 0.536 - - 1.94e-04 8.99e-05 68.080 57
CPL 1.944 0.000 1.0 0.0 2.53e-03 0.00e+00 68.820 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.677 1.721 - - 3.27e-03 2.64e-03 52.280 57
CPL 2.104 3.103 40.6 0.0 1.88e-03 0.00e+00 51.990 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 193.988 -121.064 72.924
T90 169.260 -119.252 50.008
T50 75.624 -96.448 -20.824
Peak 1.000 -119.708 -118.708
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
268.6824 -26.3286 0.0299 4.8621 134.4548 0.8330038 6.434 TRIG_00559221
Foreground time interval of the image:
-19.899 72.501 (delta_t = 92.400 [sec])
Background time interval of the image:
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 -121.064 sec. to 72.924 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.48289 ( -0.48582 0.585222 )
Norm@50keV : 1.93843E-04 ( -8.22888e-05 9.75637e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.08 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 57 degrees of freedom
# Null hypothesis probability = 1.495150e-01
Photon flux (15-150 keV) in 194 sec: 7.73186E-02 ( -0.0118478 0.0118626 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.85589e-07 ( -1.10556e-07 1.19791e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -121.064 sec. to 72.924 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.94413 ( )
Epeak [keV] : 0.991785 ( )
Norm@50keV : 2.53076E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.82 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 56 degrees of freedom
# Null hypothesis probability = 1.166627e-01
Photon flux (15-150 keV) in 194 sec: 7.72901E-02 ( -0.0124184 0.0118163 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.8374e-07 ( -1.27798e-07 1.20232e-07 ) ergs/cm2
Band function
Time interval is from -121.064 sec. to 72.924 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.23172 ( 7.23172 7.23172 )
beta : -3.48289 ( -0.585052 0.485564 )
Epeak [keV] : 7.03586 ( -7.03586 -7.03586 )
Norm@50keV : 2.63460E-02 ( -0.0111842 0.0132603 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.08 using 59 PHA bins.
# Reduced chi-squared = 1.238 for 55 degrees of freedom
# Null hypothesis probability = 1.108045e-01
Photon flux (15-150 keV) in 194 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] : 4.63355 (-0.889779 1.03033)
R^2/D10^2 : 0.898277 (-0.559228 1.81692)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.77 using 59 PHA bins.
# Reduced chi-squared = 1.312 for 57 degrees of freedom
# Null hypothesis probability = 5.724770e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.094e-07 9.286e-08
25- 50 1.667e-07 6.780e-08
50-150 4.624e-09 3.459e-09
15-150 4.807e-07 1.714e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.0024 (-3.80363 5.70302)
Norm : 1.62158 (-0.656459 1.46339)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.46 using 59 PHA bins.
# Reduced chi-squared = 1.219 for 57 degrees of freedom
# Null hypothesis probability = 1.244878e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.169e-07 8.648e-08
25- 50 1.875e-07 6.629e-08
50-150 2.459e-08 1.808e-08
15-150 5.290e-07 1.436e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.37342 (-1.16604 1.45374)
R1^2/D10^2 : 23.0740 (-81.3546 108528)
kT2 [keV] : 7.14131 (-1.64819 2.91626)
R2^2/D10^2 : 8.13947E-02 (-0.108838 0.275942)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.00 using 59 PHA bins.
# Reduced chi-squared = 1.218 for 55 degrees of freedom
# Null hypothesis probability = 1.286494e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.989e-07 1.542e-07
25- 50 1.978e-07 1.159e-07
50-150 3.345e-08 2.780e-08
15-150 5.302e-07 2.765e-07
Peak spectrum fit
Power-law model
Time interval is from -119.708 sec. to -118.708 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67735 ( -1.6396 1.80201 )
Norm@50keV : 3.26973E-03 ( -0.00326824 0.00201618 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.28 using 59 PHA bins.
# Reduced chi-squared = 0.9172 for 57 degrees of freedom
# Null hypothesis probability = 6.524663e-01
Photon flux (15-150 keV) in 1 sec: 0.430970 ( -0.43097 0.252466 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03102e-08 ( -2.00602e-08 2.18392e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -119.708 sec. to -118.708 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.10407 ( -4.43511 1.77068 )
Epeak [keV] : 40.5763 ( )
Norm@50keV : 1.88403E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.99 using 59 PHA bins.
# Reduced chi-squared = 0.9284 for 56 degrees of freedom
# Null hypothesis probability = 6.272853e-01
Photon flux (15-150 keV) in 1 sec: 0.434361 ( -0.434361 0.249686 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.99636e-08 ( -1.97573e-08 2.12655e-08 ) ergs/cm2
Band function
Time interval is from -119.708 sec. to -118.708 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.34068 ( 1.34098 1.34098 )
beta : -1.67701 ( 1.67914 1.63963 )
Epeak [keV] : 21.9280 ( -21.9719 -21.9719 )
Norm@50keV : 7.57448E-03 ( -0.00758323 5681.59 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.28 using 59 PHA bins.
# Reduced chi-squared = 0.9505 for 55 degrees of freedom
# Null hypothesis probability = 5.792140e-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] : 7.72642 (-7.80204 -7.80204)
R^2/D10^2 : 0.485489 (-0.454636 59.5113)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.56 using 59 PHA bins.
# Reduced chi-squared = 0.9572 for 57 degrees of freedom
# Null hypothesis probability = 5.671526e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.101e-09 3.597e-09
25- 50 8.397e-09 6.305e-09
50-150 1.964e-09 2.008e-09
15-150 1.546e-08 1.094e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.332 (-199.348 -199.348)
Norm : 1.69453 (-0.986484 6.60096)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.58 using 59 PHA bins.
# Reduced chi-squared = 0.9225 for 57 degrees of freedom
# Null hypothesis probability = 6.414229e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.220e-09 3.040e-09
25- 50 8.117e-09 5.580e-09
50-150 1.780e-08 1.242e-08
15-150 3.014e-08 2.070e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.45699 (-4.14698 11.0397)
R1^2/D10^2 : 1.79260 (-1.77287 754.345)
kT2 [keV] : 75.0605 (-75.0597 -75.0598)
R2^2/D10^2 : 4.10650E-04 (-0.000400474 0.175584)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.33 using 59 PHA bins.
# Reduced chi-squared = 0.9333 for 55 degrees of freedom
# Null hypothesis probability = 6.156534e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.290e-09 4.602e-09
25- 50 6.329e-09 4.404e-09
50-150 2.402e-08 1.649e-08
15-150 3.664e-08 2.048e-08
Plot creation:
Sat Jun 29 14:19:35 EDT 2013