batgrbproduct Analysis for Trigger=558982
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): Wed Jun 26 04:40:01 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger558982/GCN5_download_cron
======================================================================
Trigger: 00558982 Segment: 000
BAT Trigger Time: 393836450.24 [s; MET]
Trigger Stop: 393836452.288 [s; MET]
UTC: 2013-06-25T07:00:39.525160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 343.267990954325 Dec: 82.1783740417677 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.47
Image Trigger?: NO
Rate S/N Ratio: 10.5356537528527 [ if not an image trigger ]
Image S/N Ratio: 8.47
Flight Position: [ source = BAT ]
RA: 343.267990954325 Dec: 82.1783740417677 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 343.346659147277 Dec: 82.1731931505123 [deg; J2000]
{ 22h 53m 23.2s , +82d 10' 23.5" }
+/- 1.18951657776615 [arcmin] (estimated 90% radius based on SNR)
+/- 0.40166893043532 [arcmin] (formal 1-sigma fit error)
SNR: 23.7381154982813
Angular difference between Flight and Ground position is 0.713808 arcmin
Partial Coding Fraction: 0.75 [ including projection effects ]
Duration
T90: 36.9799999594688 +/- 9.4855521486806
Measured from: -19.3039999008179
to: 17.676000058651 [s; relative to TRIGTIME]
T50: 16.527999997139 +/- 2.56478614387288
Measured from: -9.78399991989136
to: 6.74400007724762 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.54399996995926
to: 3.54399996995926 [s; relative to TRIGTIME]
Total Fluence
Measured from: -29.3680000305176
to: 28.3880000114441 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.731172 1.066997 0.878929 0.191001
0.052909 0.055617 0.048558 0.039997 [error]
Peak 0.032741 0.063853 0.038508 0.010660
0.007250 0.007958 0.006734 0.005277 [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 2.30e-07 4.43e-07 6.60e-07 2.12e-06 1.86e-06 3.45e-06 erg/cm2
Error 2.39e-08 2.75e-08 4.73e-08 3.34e-07 1.16e-07 3.66e-07 erg/cm2
Peak flux Power-law 4.01e-01 3.96e-01 2.74e-01 2.98e-01 1.19e+00 1.37e+00 ph/cm2/s
Error 9.97e-02 6.31e-02 5.45e-02 1.18e-01 1.83e-01 2.13e-01 ph/cm2/s
Fluence Cutoff-PL 2.17e-07 4.56e-07 6.76e-07 1.36e-06 1.82e-06 2.71e-06 erg/cm2
Error 2.90e-08 3.23e-08 5.24e-08 6.43e-07 1.27e-07 7.23e-07 erg/cm2
Peak flux Cutoff-PL 3.69e-01 4.29e-01 2.82e-01 1.32e-01 1.16e+00 1.21e+00 ph/cm2/s
Error 1.21e-01 9.29e-02 6.16e-02 1.84e-01 1.93e-01 2.84e-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 1.425 0.101 - - 3.35e-03 1.91e-04 47.440 57
CPL 1.119 0.389 149.8 -45.3 4.72e-03 2.15e-03 45.690 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.533 0.257 - - 9.44e-03 1.50e-03 52.620 57
CPL 0.846 1.423 77.1 -24.4 2.24e-02 1.14e-01 51.910 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: 33.536000 sec.
T50 in the 50-300 keV band: 17.216000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 57.756 -29.368 28.388
T90 36.980 -19.304 17.676
T50 16.528 -9.784 6.744
Peak 1.000 2.544 3.544
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
343.3467 +82.1732 0.0080 28.6 13.9 2.8846 23.7 TRIG_00558982
------------------------------------------
Foreground time interval of the image:
-29.368 25.461 (delta_t = 54.829 [sec])
Background time interval of the image:
-239.240 -29.368 (delta_t = 209.872 [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 -29.368 sec. to 28.388 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42539 ( -0.100563 0.100565 )
Norm@50keV : 3.34844E-03 ( -0.000190813 0.000190531 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.44 using 59 PHA bins.
# Reduced chi-squared = 0.8322 for 57 degrees of freedom
# Null hypothesis probability = 8.126884e-01
Photon flux (15-150 keV) in 57.76 sec: 0.410189 ( -0.0241635 0.024208 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85938e-06 ( -1.15729e-07 1.16237e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -29.368 sec. to 28.388 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11898 ( -0.43026 0.348444 )
Epeak [keV] : 149.757 ( -59.0766 -149.757 )
Norm@50keV : 4.72368E-03 ( -0.00147672 0.00282804 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.69 using 59 PHA bins.
# Reduced chi-squared = 0.8158 for 56 degrees of freedom
# Null hypothesis probability = 8.358848e-01
Photon flux (15-150 keV) in 57.76 sec: 0.403914 ( -0.025469 0.025445 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.82099e-06 ( -1.27707e-07 1.26858e-07 ) ergs/cm2
Band function
Time interval is from -29.368 sec. to 28.388 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.03082 ( 0.922096 0.922096 )
beta : -1.69276 ( 1.60764 0.240441 )
Epeak [keV] : 121.832 ( -100.332 -100.332 )
Norm@50keV : 5.28284E-03 ( -0.00181903 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.48 using 59 PHA bins.
# Reduced chi-squared = 0.8268 for 55 degrees of freedom
# Null hypothesis probability = 8.164744e-01
Photon flux (15-150 keV) in 57.76 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] : 16.3153 (-1.17502 1.28722)
R^2/D10^2 : 3.50265E-02 (-0.00814109 0.0104488)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 105.92 using 59 PHA bins.
# Reduced chi-squared = 1.8582 for 57 degrees of freedom
# Null hypothesis probability = 8.953470e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.108e-07 1.343e-08
25- 50 4.742e-07 3.468e-08
50-150 8.888e-07 9.502e-08
15-150 1.474e-06 1.031e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 1.69668 (-0.0960556 0.0960479)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.75 using 59 PHA bins.
# Reduced chi-squared = 0.8903 for 57 degrees of freedom
# Null hypothesis probability = 7.072279e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.441e-07 1.635e-08
25- 50 4.695e-07 3.278e-08
50-150 1.030e-06 1.869e-07
15-150 1.743e-06 2.074e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.22241 (-1.64357 1.96729)
R1^2/D10^2 : 0.341765 (-0.177244 0.484403)
kT2 [keV] : 26.3775 (-4.55011 9.00055)
R2^2/D10^2 : 5.39602E-03 (-0.00347702 0.00556489)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.27 using 59 PHA bins.
# Reduced chi-squared = 0.8777 for 55 degrees of freedom
# Null hypothesis probability = 7.275308e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.073e-07 5.710e-08
25- 50 4.613e-07 8.658e-08
50-150 1.135e-06 3.665e-07
15-150 1.804e-06 4.141e-07
Peak spectrum fit
Power-law model
Time interval is from 2.544 sec. to 3.544 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53320 ( -0.255139 0.259193 )
Norm@50keV : 9.44251E-03 ( -0.0015121 0.00149468 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.62 using 59 PHA bins.
# Reduced chi-squared = 0.9231 for 57 degrees of freedom
# Null hypothesis probability = 6.399814e-01
Photon flux (15-150 keV) in 1 sec: 1.18964 ( -0.183279 0.183451 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.91113e-08 ( -1.53738e-08 1.56022e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.544 sec. to 3.544 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.845977 ( -1.88086 0.964769 )
Epeak [keV] : 77.1195 ( -28.7795 -77.5183 )
Norm@50keV : 2.23583E-02 ( -0.0139368 0.213346 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.91 using 59 PHA bins.
# Reduced chi-squared = 0.9270 for 56 degrees of freedom
# Null hypothesis probability = 6.303602e-01
Photon flux (15-150 keV) in 1 sec: 1.16433 ( -0.195335 0.19122 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.37755e-08 ( -1.88469e-08 1.87415e-08 ) ergs/cm2
Band function
Time interval is from 2.544 sec. to 3.544 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.61416E-02 ( 0.133497 0.133497 )
beta : -2.03614 ( 2.02662 0.627654 )
Epeak [keV] : 52.7620 ( -52.7185 196.064 )
Norm@50keV : 7.64296E-02 ( -0.0762159 974.278 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.65 using 59 PHA bins.
# Reduced chi-squared = 0.9208 for 55 degrees of freedom
# Null hypothesis probability = 6.415723e-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] : 13.1105 (-1.9522 2.43034)
R^2/D10^2 : 0.224578 (-0.104222 0.178048)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.81 using 59 PHA bins.
# Reduced chi-squared = 0.9791 for 57 degrees of freedom
# Null hypothesis probability = 5.198011e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.186e-09 2.238e-09
25- 50 2.845e-08 6.085e-09
50-150 3.107e-08 1.051e-08
15-150 6.770e-08 1.374e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.313 (-103.153 -198.313)
Norm : 4.87917 (-0.741084 0.880576)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.08 using 59 PHA bins.
# Reduced chi-squared = 0.9137 for 57 degrees of freedom
# Null hypothesis probability = 6.596354e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.216e-08 6.965e-09
25- 50 2.337e-08 1.291e-08
50-150 5.117e-08 2.814e-08
15-150 8.670e-08 4.898e-08
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.37 using 59 PHA bins.
#Fit statistic : Chi-Squared = 48.85 using 59 PHA bins.
#Fit statistic : Chi-Squared = 48.33 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.82 using 59 PHA bins.
# Reduced chi-squared = 0.9704 for 55 degrees of freedom
# Reduced chi-squared = 0.8881 for 55 degrees of freedom
# Reduced chi-squared = 0.8788 for 55 degrees of freedom
# Reduced chi-squared = 0.8695 for 55 degrees of freedom
# Null hypothesis probability = 5.370685e-01
# Null hypothesis probability = 7.074402e-01
# Null hypothesis probability = 7.254046e-01
# Null hypothesis probability = 7.429439e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.063e-08 4.323e-09
25- 50 2.582e-08 1.131e-08
50-150 3.501e-08 1.589e-08
15-150 7.146e-08 2.844e-08
Plot creation:
Wed Jun 26 05:01:38 EDT 2013