batgrbproduct Analysis for Trigger=620090
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 Dec 1 11:09:16 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger620090/GCN5_download_cron
======================================================================
Trigger: 00620090 Segment: 000
BAT Trigger Time: 439081868.928 [s; MET]
Trigger Stop: 439081873.024 [s; MET]
UTC: 2014-11-30T23:10:56.070900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 222.814459238838 Dec: 47.2999559433812 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.77
Image Trigger?: NO
Rate S/N Ratio: 10.0498756211209 [ if not an image trigger ]
Image S/N Ratio: 9.77
Flight Position: [ source = BAT ]
RA: 222.814459238838 Dec: 47.2999559433812 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 222.804168706749 Dec: 47.3234179770372 [deg; J2000]
{ 14h 51m 13.0s , +47d 19' 24.3" }
+/- 1.35341973018731 [arcmin] (estimated 90% radius based on SNR)
+/- 0.541623485906561 [arcmin] (formal 1-sigma fit error)
SNR: 19.7404778344924
Angular difference between Flight and Ground position is 1.468648 arcmin
Partial Coding Fraction: 0.734375 [ including projection effects ]
Duration
T90: 62.8559999465942 +/- 11.3720388524948
Measured from: -38.9359998703003
to: 23.9200000762939 [s; relative to TRIGTIME]
T50: 26.5519999265671 +/- 2.8045049509388
Measured from: -24.3079998493195
to: 2.24400007724762 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -4.68799996376038
to: -3.68799996376038 [s; relative to TRIGTIME]
Total Fluence
Measured from: -42.7479999661446
to: 40.0160000324249 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.301384 1.773289 1.210942 0.193171
0.065371 0.068274 0.059078 0.049624 [error]
Peak 0.029681 0.067912 0.049955 0.010130
0.007541 0.008132 0.006844 0.005752 [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 3.99e-07 7.06e-07 9.58e-07 2.68e-06 2.77e-06 4.74e-06 erg/cm2
Error 3.19e-08 3.37e-08 5.89e-08 3.57e-07 1.41e-07 4.00e-07 erg/cm2
Peak flux Power-law 3.71e-01 3.97e-01 3.01e-01 3.72e-01 1.21e+00 1.44e+00 ph/cm2/s
Error 9.02e-02 6.25e-02 5.43e-02 1.33e-01 1.80e-01 2.19e-01 ph/cm2/s
Fluence Cutoff-PL 3.82e-07 7.26e-07 9.69e-07 1.75e-06 2.71e-06 3.83e-06 erg/cm2
Error 3.77e-08 4.12e-08 6.21e-08 6.29e-07 1.63e-07 8.99e-07 erg/cm2
Peak flux Cutoff-PL 2.80e-01 4.55e-01 3.36e-01 9.71e-02 1.15e+00 1.17e+00 ph/cm2/s
Error 1.07e-01 8.02e-02 6.67e-02 -------- 1.85e-01 2.05e-01 ph/cm2/s
Fluence Band 3.56e-07 7.50e-07 9.38e-07 2.33e-06 2.70e-06 4.38e-06 erg/cm2
Error 4.16e-08 -------- 6.14e-08 3.98e-07 1.47e-07 4.39e-07 erg/cm2
Peak flux Band 2.75e-01 4.53e-01 3.36e-01 9.53e-02 1.14e+00 1.16e+00 ph/cm2/s
Error 1.05e-01 -------- -------- -------- 1.83e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.561 0.083 - - 3.57e-03 1.66e-04 60.490 57
CPL 1.296 0.324 129.6 -40.8 4.88e-03 1.91e-03 58.550 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.398 0.235 - - 9.94e-03 1.49e-03 60.260 57
CPL -0.171 1.256 68.7 30.2 6.17e-02 1.50e-01 53.730 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: 54.848000 sec.
T50 in the 50-300 keV band: 29.696000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 82.764 -42.748 40.016
T90 62.856 -38.936 23.920
T50 26.552 -24.308 2.244
Peak 1.000 -4.688 -3.688
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
222.8042 +47.3234 0.0097 17.7 102.8 4.3993 19.7 TRIG_00620090
------------------------------------------
Foreground time interval of the image:
-42.748 33.373 (delta_t = 76.121 [sec])
Background time interval of the image:
-68.527 -42.748 (delta_t = 25.779 [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 -42.748 sec. to 40.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56119 ( -0.0825956 0.0829133 )
Norm@50keV : 3.56645E-03 ( -0.000166485 0.00016604 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.49 using 59 PHA bins.
# Reduced chi-squared = 1.061 for 57 degrees of freedom
# Null hypothesis probability = 3.508803e-01
Photon flux (15-150 keV) in 82.76 sec: 0.452967 ( -0.0212269 0.0212573 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.77431e-06 ( -1.40214e-07 1.40925e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -42.748 sec. to 40.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29567 ( -0.349796 0.298491 )
Epeak [keV] : 129.589 ( -48.0406 -129.601 )
Norm@50keV : 4.87869E-03 ( -0.00139298 0.00243001 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.55 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 56 degrees of freedom
# Null hypothesis probability = 3.818848e-01
Photon flux (15-150 keV) in 82.76 sec: 0.446356 ( -0.022659 0.022649 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.70795e-06 ( -1.63633e-07 1.62764e-07 ) ergs/cm2
Band function
Time interval is from -42.748 sec. to 40.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.76835 ( -4.87091 -3.77991 )
beta : -1.68043 ( -0.122359 0.108138 )
Epeak [keV] : 29.2738 ( -3.94395 4.95949 )
Norm@50keV : 4.60233 ( -4.60156 87.9424 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9577 for 55 degrees of freedom
# Null hypothesis probability = 5.640435e-01
Photon flux (15-150 keV) in 82.76 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.70385e-06 ( -2.70327e-06 -1.46179e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.0458 ( )
R^2/D10^2 : 6.24153E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 157.59 using 59 PHA bins.
# Reduced chi-squared = 2.7648 for 57 degrees of freedom
# Null hypothesis probability = 2.271964e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.152e-07 1.788e-08
25- 50 8.030e-07 4.746e-08
50-150 1.045e-06 1.043e-07
15-150 2.063e-06 1.138e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.851 (-47.6344 -198.835)
Norm : 1.83656 (-0.0832536 0.094239)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.35 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 57 degrees of freedom
# Null hypothesis probability = 4.256775e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.786e-07 1.974e-08
25- 50 7.281e-07 4.887e-08
50-150 1.595e-06 3.476e-07
15-150 2.702e-06 3.815e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.78830 (-1.18153 1.34399)
R1^2/D10^2 : 0.353127 (-0.134206 0.242173)
kT2 [keV] : 29.4573 (-5.98501 12.6675)
R2^2/D10^2 : 3.43763E-03 (-0.0023102 0.00432518)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.57 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 55 degrees of freedom
# Null hypothesis probability = 3.803793e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.531e-07 5.069e-08
25- 50 7.634e-07 1.066e-07
50-150 1.602e-06 4.324e-07
15-150 2.718e-06 5.226e-07
Peak spectrum fit
Power-law model
Time interval is from -4.688 sec. to -3.688 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39820 ( -0.234325 0.235006 )
Norm@50keV : 9.94206E-03 ( -0.00149003 0.00148422 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.26 using 59 PHA bins.
# Reduced chi-squared = 1.057 for 57 degrees of freedom
# Null hypothesis probability = 3.586004e-01
Photon flux (15-150 keV) in 1 sec: 1.21027 ( -0.180099 0.18038 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.61001e-08 ( -1.57445e-08 1.59798e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.688 sec. to -3.688 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.171496 ( -1.41775 1.09513 )
Epeak [keV] : 68.6836 ( -14.1387 46.3023 )
Norm@50keV : 6.16661E-02 ( -0.061666 0.238558 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.73 using 59 PHA bins.
# Reduced chi-squared = 0.9595 for 56 degrees of freedom
# Null hypothesis probability = 5.611971e-01
Photon flux (15-150 keV) in 1 sec: 1.14716 ( -0.184934 0.18553 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.69344e-08 ( -1.59796e-08 1.68956e-08 ) ergs/cm2
Band function
Time interval is from -4.688 sec. to -3.688 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.171162 ( -0.928729 1.53681 )
beta : -10.0000 ( 10 5.32907e-15 )
Epeak [keV] : 68.6779 ( -12.8328 46.1769 )
Norm@50keV : 6.16500E-02 ( -0.06165 0.239292 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.73 using 59 PHA bins.
# Reduced chi-squared = 0.9769 for 55 degrees of freedom
# Null hypothesis probability = 5.231587e-01
Photon flux (15-150 keV) in 1 sec: 1.13885 ( 5.86115 -0.184808 ) 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] : 15.6617 (-2.31626 2.78254)
R^2/D10^2 : 0.128063 (-0.0560534 0.0959392)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.07 using 59 PHA bins.
# Reduced chi-squared = 0.9836 for 57 degrees of freedom
# Null hypothesis probability = 5.101389e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.525e-09 1.700e-09
25- 50 2.695e-08 6.200e-09
50-150 4.582e-08 1.335e-08
15-150 7.930e-08 1.608e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-75.3485 -199.363)
Norm : 5.02716 (-0.734826 0.734826)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.01 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 57 degrees of freedom
# Null hypothesis probability = 4.019418e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.252e-08 7.135e-09
25- 50 2.408e-08 1.356e-08
50-150 5.281e-08 2.986e-08
15-150 8.941e-08 4.999e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.15261 (-7.23119 -7.23215)
R1^2/D10^2 : 0.646682 (-0.32991 -0.64446)
kT2 [keV] : 19.3770 (-19.4454 -19.4456)
R2^2/D10^2 : 5.09545E-02 (-0.0507023 0.104753)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.29 using 59 PHA bins.
# Reduced chi-squared = 0.9689 for 55 degrees of freedom
# Null hypothesis probability = 5.402605e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.166e-09 5.075e-09
25- 50 2.596e-08 1.336e-08
50-150 5.181e-08 3.068e-08
15-150 8.693e-08 4.658e-08
Plot creation:
Mon Dec 1 11:13:36 EST 2014