batgrbproduct Analysis for Trigger=603488
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): Sun Jul 6 02:41:29 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger603488/GCN5_download_cron
======================================================================
Trigger: 00603488 Segment: 000
BAT Trigger Time: 426245580.892 [s; MET]
Trigger Stop: 426245580.956 [s; MET]
UTC: 2014-07-05T09:32:48.666480 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 293.724837159397 Dec: 21.8993259804969 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.89
Image Trigger?: NO
Rate S/N Ratio: 36.3730669589464 [ if not an image trigger ]
Image S/N Ratio: 14.89
Flight Position: [ source = BAT ]
RA: 293.724837159397 Dec: 21.8993259804969 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 293.824133924896 Dec: 21.762132262489 [deg; J2000]
{ 19h 35m 17.8s , +21d 45' 43.7" }
+/- 3.62998704631286 [arcmin] (estimated 90% radius based on SNR)
+/- 2.0166274232111 [arcmin] (formal 1-sigma fit error)
SNR: 4.82229735737868
Angular difference between Flight and Ground position is 9.916985 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 121.991999924183 +/- 120.155263600202
Measured from: 96.024000108242
to: 218.016000032425 [s; relative to TRIGTIME]
T50: 31.0519999265671 +/- 75.473384964853
Measured from: 135.084000110626
to: 166.136000037193 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.25
to: 0.75 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0240000486373901
to: 285.84399998188 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.041470 0.122278 0.075658 0.032311
0.102712 0.102855 0.089318 0.080949 [error]
Peak 0.041176 0.043853 0.021772 -0.009091
0.006966 0.006887 0.005765 0.004878 [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 1.71e-08 4.23e-08 8.32e-08 4.07e-07 2.25e-07 5.49e-07 erg/cm2
Error 2.77e-08 4.35e-08 8.22e-08 2.87e-06 2.14e-07 2.89e-06 erg/cm2
Peak flux Power-law 4.49e-01 2.87e-01 1.19e-01 6.71e-02 8.89e-01 9.22e-01 ph/cm2/s
Error 1.00e-01 5.40e-02 4.22e-02 4.36e-02 1.56e-01 1.66e-01 ph/cm2/s
Fluence Cutoff-PL 1.29e-08 4.45e-08 9.12e-08 1.29e-07 2.11e-07 2.78e-07 erg/cm2
Error 2.75e-08 5.38e-08 1.03e-07 6.26e-07 2.22e-07 -------- erg/cm2
Peak flux Cutoff-PL 4.26e-01 3.29e-01 9.65e-02 9.47e-03 8.60e-01 8.61e-01 ph/cm2/s
Error 1.08e-01 8.11e-02 7.74e-02 4.80e-02 1.60e-01 1.65e-01 ph/cm2/s
Fluence Band 1.35e-08 4.37e-08 9.01e-08 1.68e-07 2.16e-07 3.19e-07 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 4.25e-01 3.31e-01 9.51e-02 8.64e-03 8.59e-01 8.58e-01 ph/cm2/s
Error 1.08e-01 -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.023 2.075 - - 7.33e-05 6.96e-05 62.980 57
CPL 0.335 0.000 139.8 0.0 1.46e-04 0.00e+00 62.920 56
The chi2 of BB fit is 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 2.271 0.360 - - 5.17e-03 1.40e-03 87.530 57
CPL 0.951 2.855 27.9 0.0 3.64e-02 0.00e+00 85.810 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 285.868 -0.024 285.844
T90 121.992 96.024 218.016
T50 31.052 135.084 166.136
Peak 1.000 -0.250 0.750
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
293.8241 +21.7621 0.0398 11.8 -67.9 0.1713 4.8 TRIG_00603488
------------------------------------------
Foreground time interval of the image:
-0.024 8.609 (delta_t = 8.633 [sec])
Background time interval of the image:
-239.892 -0.024 (delta_t = 239.868 [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 285.844 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02328 ( -1.02326 3.12738 )
Norm@50keV : 7.32598E-05 ( -7.32595e-05 6.59611e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.98 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 57 degrees of freedom
# Null hypothesis probability = 2.731073e-01
Photon flux (15-150 keV) in 285.9 sec: 8.44769E-03 ( -0.00844769 0.00790393 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.24741e-07 ( -2.04736e-07 2.22569e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.024 sec. to 285.844 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.334585 ( -0.305265 -0.305265 )
Epeak [keV] : 139.849 ( -120.313 -120.313 )
Norm@50keV : 1.46117E-04 ( -0.000202227 -0.000202227 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.92 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 56 degrees of freedom
# Null hypothesis probability = 2.446078e-01
Photon flux (15-150 keV) in 285.9 sec: 7.99118E-03 ( -0.00799118 0.00823442 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11252e-07 ( -2.11252e-07 2.33268e-07 ) ergs/cm2
Band function
Time interval is from -0.024 sec. to 285.844 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.27171 ( -1.02093 0.744573 )
beta : -2.21322 ( 9.37162 9.37162 )
Epeak [keV] : 79.0711 ( -249.72 -255.69 )
Norm@50keV : 7.39380E-04 ( -0.000589859 0.121302 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.92 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 55 degrees of freedom
# Null hypothesis probability = 2.162464e-01
Photon flux (15-150 keV) in 285.9 sec: 8.12362E-03 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.16222e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 20.8588 (-20.9119 -20.9119)
R^2/D10^2 : 3.58245E-04 (-0.000355364 0.0350459)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.97 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 57 degrees of freedom
# Null hypothesis probability = 2.734827e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.443e-09 6.590e-09
25- 50 4.322e-08 2.999e-08
50-150 1.401e-07 1.115e-07
15-150 1.917e-07 1.733e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.363 -199.363)
Norm : 3.48208E-02 (-0.0324547 0.0324545)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.27 using 59 PHA bins.
# Reduced chi-squared = 1.110 for 57 degrees of freedom
# Null hypothesis probability = 2.647758e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.479e-08 2.101e-08
25- 50 4.769e-08 4.107e-08
50-150 1.046e-07 8.590e-08
15-150 1.771e-07 1.426e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.08965 (-1.12571 -1.12571)
R1^2/D10^2 : 1443.82 (-809.596 1.44443e+08)
kT2 [keV] : 21.0433 (-16.2784 -21.8856)
R2^2/D10^2 : 3.43227E-04 (-0.000302272 0.0219105)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.79 using 59 PHA bins.
# Reduced chi-squared = 1.142 for 55 degrees of freedom
# Null hypothesis probability = 2.197768e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.155e-08 6.370e-09
25- 50 4.222e-08 3.031e-08
50-150 1.394e-07 1.153e-07
15-150 1.931e-07 1.492e-07
Peak spectrum fit
Power-law model
Time interval is from -0.250 sec. to 0.750 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.27117 ( -0.335847 0.384311 )
Norm@50keV : 5.16830E-03 ( -0.00141049 0.00138222 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.53 using 59 PHA bins.
# Reduced chi-squared = 1.536 for 57 degrees of freedom
# Null hypothesis probability = 5.768494e-03
Photon flux (15-150 keV) in 1 sec: 0.888944 ( -0.156423 0.156478 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.91368e-08 ( -1.08781e-08 1.14973e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.250 sec. to 0.750 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.951066 ( -4.6886 1.02042 )
Epeak [keV] : 27.8507 ( )
Norm@50keV : 3.63524E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.81 using 59 PHA bins.
# Reduced chi-squared = 1.532 for 56 degrees of freedom
# Null hypothesis probability = 6.354133e-03
Photon flux (15-150 keV) in 1 sec: 0.860200 ( -0.160412 0.16021 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.29307e-08 ( -1.16853e-08 1.37671e-08 ) ergs/cm2
Band function
Time interval is from -0.250 sec. to 0.750 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.80518 ( -9.41863 -2.80519 )
beta : -3.04119 ( -3.1472 0.783839 )
Epeak [keV] : 27.0412 ( -6.37112 7.39592 )
Norm@50keV : 19.0359 ( -19.0477 320.687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.04 using 59 PHA bins.
# Reduced chi-squared = 1.528 for 55 degrees of freedom
# Null hypothesis probability = 7.077373e-03
Photon flux (15-150 keV) in 1 sec: 0.858520 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.42267e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.46790 (-1.22771 1.52165)
R^2/D10^2 : 1.32334 (-0.701286 1.42382)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.21 using 59 PHA bins.
# Reduced chi-squared = 1.530 for 57 degrees of freedom
# Null hypothesis probability = 6.144204e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.262e-08 3.748e-09
25- 50 1.953e-08 6.010e-09
50-150 4.067e-09 2.336e-09
15-150 3.621e-08 1.143e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 39.7937 (-14.3832 27.9672)
Norm : 5.82865 (-1.65866 2.57226)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.88 using 59 PHA bins.
# Reduced chi-squared = 1.507 for 57 degrees of freedom
# Null hypothesis probability = 8.001595e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.336e-08 3.338e-09
25- 50 1.754e-08 4.375e-09
50-150 1.349e-08 7.292e-09
15-150 4.439e-08 1.186e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.30035 (-1.91112 1.73549)
R1^2/D10^2 : 2.23622 (-1.32642 4.7213)
kT2 [keV] : 21.7135 (-14.4069 -21.6851)
R2^2/D10^2 : 8.59822E-03 (-0.00862847 0.527074)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.91 using 59 PHA bins.
# Reduced chi-squared = 1.526 for 55 degrees of freedom
# Null hypothesis probability = 7.263526e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.336e-08 7.565e-09
25- 50 1.792e-08 1.033e-08
50-150 1.550e-08 9.885e-09
15-150 4.678e-08 2.471e-08
Plot creation:
Sun Jul 6 02:45:32 EDT 2014