batgrbproduct Analysis for Trigger=602278
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): Mon Jun 23 02:29:29 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger602278/GCN5_download_cron
======================================================================
Trigger: 00602278 Segment: 000
BAT Trigger Time: 425122576.888 [s; MET]
Trigger Stop: 425122576.952 [s; MET]
UTC: 2014-06-22T09:36:04.716920 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 317.1522269814 Dec: -14.4303092061331 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.79
Image Trigger?: NO
Rate S/N Ratio: 12.4498995979887 [ if not an image trigger ]
Image S/N Ratio: 6.79
Flight Position: [ source = BAT ]
RA: 317.1522269814 Dec: -14.4303092061331 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 317.154608727158 Dec: -14.4118482434694 [deg; J2000]
{ 21h 08m 37.1s , -14d 24' 42.7" }
+/- 2.52845373643029 [arcmin] (estimated 90% radius based on SNR)
+/- 1.33320174893117 [arcmin] (formal 1-sigma fit error)
SNR: 8.08371922245328
Angular difference between Flight and Ground position is 1.116271 arcmin
Partial Coding Fraction: 0.5703125 [ including projection effects ]
Duration
T90: 0.131999969482422 +/- 0.035777106832332
Measured from: -0.0119999051094055
to: 0.120000064373016 [s; relative to TRIGTIME]
T50: 0.0519999861717224 +/- 0.0341760075028058
Measured from: 0.0120000839233398
to: 0.0640000700950623 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.446000039577484
to: 0.553999960422516 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0239999890327454
to: 0.12799996137619 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.011595 0.029216 0.016356 0.002189
0.004143 0.004487 0.003801 0.002701 [error]
Peak 0.016738 0.039152 0.009991 0.007833
0.008956 0.008993 0.007793 0.006138 [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 6.13e-09 4.42e-09 2.11e-09 1.42e-09 1.33e-08 1.41e-08 erg/cm2
Error 1.91e-09 1.25e-09 7.58e-10 7.65e-10 3.76e-09 3.99e-09 erg/cm2
Peak flux Power-law 2.71e-01 2.12e-01 1.11e-01 8.49e-02 6.33e-01 6.79e-01 ph/cm2/s
Error 1.38e-01 7.49e-02 6.16e-02 1.05e-01 2.25e-01 2.42e-01 ph/cm2/s
Fluence Cutoff-PL 4.55e-09 1.24e-08 8.97e-09 9.12e-10 2.68e-08 2.69e-08 erg/cm2
Error 2.01e-09 2.86e-09 3.35e-09 5.78e-09 5.81e-09 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.66e-01 2.19e-01 1.11e-01 5.65e-02 6.28e-01 6.46e-01 ph/cm2/s
Error 2.07e-01 1.38e-01 8.84e-02 1.04e-01 2.61e-01 2.55e-01 ph/cm2/s
Fluence Band 4.55e-09 1.01e-09 9.63e-10 2.69e-08 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 3.066 0.294 - - 7.08e-03 2.23e-03 64.600 57
CPL -1.178 1.806 44.2 7.4 1.18e+00 1.17e+01 36.650 56
The chi2 of BB fit is 36.91 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 1.927 0.683 - - 4.36e-03 1.88e-03 35.820 57
CPL 1.534 1.336 46.4 0.0 7.53e-03 0.00e+00 35.810 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 0.152 -0.024 0.128
T90 0.132 -0.012 0.120
T50 0.052 0.012 0.064
Peak 1.000 -0.446 0.554
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
317.1546 -14.4118 0.0238 37.8 4.4 0.0604 8.1 TRIG_00602278
------------------------------------------
Foreground time interval of the image:
-0.024 0.128 (delta_t = 0.152 [sec])
Background time interval of the image:
-60.888 -0.024 (delta_t = 60.864 [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 -0.024 sec. to 0.128 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.06565 ( -0.261143 0.327781 )
Norm@50keV : 7.08149E-03 ( -0.00226299 0.00219423 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.60 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 57 degrees of freedom
# Null hypothesis probability = 2.282581e-01
Photon flux (15-150 keV) in 0.152 sec: 2.04414 ( -0.593412 0.593871 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33388e-08 ( -3.76229e-09 3.76232e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.024 sec. to 0.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.17771 ( -2.30702 1.3053 )
Epeak [keV] : 44.1527 ( -7.87326 6.9381 )
Norm@50keV : 1.17877 ( -1.17877 22.1587 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.65 using 59 PHA bins.
# Reduced chi-squared = 0.6544 for 56 degrees of freedom
# Null hypothesis probability = 9.788629e-01
Photon flux (15-150 keV) in 0.152 sec: 2.97612 ( -0.65868 0.66407 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.68175e-08 ( -5.78162e-09 5.77782e-09 ) ergs/cm2
Band function
Time interval is from -0.024 sec. to 0.128 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.26753 ( -1.04153 3.47355 )
beta : -8.50600 ( 9.09099 4.44121 )
Epeak [keV] : 44.1920 ( -7.96086 5.63333 )
Norm@50keV : 1.30984 ( -1.20828 129.8 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.65 using 59 PHA bins.
# Reduced chi-squared = 0.6665 for 55 degrees of freedom
# Null hypothesis probability = 9.730534e-01
Photon flux (15-150 keV) in 0.152 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.6904e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.6289 (-2.0201 1.67498)
R^2/D10^2 : 0.959525 (-0.427924 1.00026)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.91 using 59 PHA bins.
# Reduced chi-squared = 0.6476 for 57 degrees of freedom
# Null hypothesis probability = 9.820763e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.158e-09 1.418e-09
25- 50 1.260e-08 3.639e-09
50-150 1.003e-08 3.716e-09
15-150 2.679e-08 7.760e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 34.8611 (-6.73969 6.67026)
Norm : 20.7557 (-5.81009 6.58205)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.60 using 59 PHA bins.
# Reduced chi-squared = 0.8351 for 57 degrees of freedom
# Null hypothesis probability = 8.079605e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.881e-09 1.832e-09
25- 50 8.500e-09 1.879e-09
50-150 5.618e-09 2.113e-09
15-150 2.100e-08 5.031e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.88018 (-7.521 -7.521)
R1^2/D10^2 : 1.05609 (-1.07777 -1.07777)
kT2 [keV] : 12.6031 (-12.5496 50.9927)
R2^2/D10^2 : 0.546978 (-0.555185 1.32402)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.62 using 59 PHA bins.
# Reduced chi-squared = 0.6658 for 55 degrees of freedom
# Null hypothesis probability = 9.733193e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.582e-09 4.804e-09
25- 50 1.236e-08 1.368e-08
50-150 9.947e-09 2.450e-08
15-150 2.689e-08 3.181e-08
Peak spectrum fit
Power-law model
Time interval is from -0.446 sec. to 0.554 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92684 ( -0.629986 0.73578 )
Norm@50keV : 4.35726E-03 ( -0.00195112 0.00181743 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.82 using 59 PHA bins.
# Reduced chi-squared = 0.6285 for 57 degrees of freedom
# Null hypothesis probability = 9.873581e-01
Photon flux (15-150 keV) in 1 sec: 0.632558 ( -0.22472 0.224895 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.00747e-08 ( -1.63214e-08 1.72289e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.446 sec. to 0.554 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53359 ( -1.57674 1.09514 )
Epeak [keV] : 46.3991 ( )
Norm@50keV : 7.52780E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.81 using 59 PHA bins.
# Reduced chi-squared = 0.6394 for 56 degrees of freedom
# Null hypothesis probability = 9.837097e-01
Photon flux (15-150 keV) in 1 sec: 0.627717 ( -0.292495 0.228689 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.86223e-08 ( -2.21505e-08 1.20893e-08 ) ergs/cm2
Band function
Time interval is from -0.446 sec. to 0.554 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.72693 ( -4.72693 -4.72693 )
beta : -2.66459 ( 2.66459 1.12771 )
Epeak [keV] : 31.0416 ( -31.0416 11.411 )
Norm@50keV : 123.492 ( -42.9917 9.25214e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.11 using 59 PHA bins.
# Reduced chi-squared = 0.6383 for 55 degrees of freedom
# Null hypothesis probability = 9.831904e-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] : 8.91620 (-2.62354 4.20103)
R^2/D10^2 : 0.475032 (-0.474984 1.36469)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.07 using 59 PHA bins.
# Reduced chi-squared = 0.6328 for 57 degrees of freedom
# Null hypothesis probability = 9.862897e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.316e-09 4.766e-09
25- 50 1.532e-08 9.835e-09
50-150 5.680e-09 4.503e-09
15-150 2.832e-08 1.850e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 70.0399 (-70.0375 -70.0375)
Norm : 3.12982 (-1.39236 2.95189)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.81 using 59 PHA bins.
# Reduced chi-squared = 0.6283 for 57 degrees of freedom
# Null hypothesis probability = 9.873992e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.030e-09 5.265e-09
25- 50 1.278e-08 7.980e-09
50-150 1.642e-08 1.458e-08
15-150 3.723e-08 2.599e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.820672 (-0.805498 12.2894)
R1^2/D10^2 : 3.09747E+06 (-5.86283e+06 -5.86283e+06)
kT2 [keV] : 9.13315 (-2.7579 4.69158)
R2^2/D10^2 : 0.424885 (-0.341824 1.31888)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.87 using 59 PHA bins.
# Reduced chi-squared = 0.6523 for 55 degrees of freedom
# Null hypothesis probability = 9.786339e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.150e-09 4.420e-09
25- 50 1.512e-08 9.875e-09
50-150 6.031e-09 4.592e-09
15-150 2.830e-08 1.820e-08
Plot creation:
Mon Jun 23 02:32:07 EDT 2014