Click here for the BAT GCN circular template
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
227.5381 -19.6424 0.0168 35.4829 -37.8599 2.0309088 11.473 TRIG_00656604
Foreground time interval of the image:
3.508 73.301 (delta_t = 69.793 [sec])
Background time interval of the image:
-75.099 3.508 (delta_t = 78.607 [sec])
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Quad-rate summed light curves (from T0-300s to T0+1000s)
Spectral Evolution
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from 3.508 sec. to 149.612 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.18603 ( -0.196776 0.209194 )
Norm@50keV : 9.95853E-04 ( -0.000138913 0.000135769 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.58 using 59 PHA bins.
# Reduced chi-squared = 1.203 for 57 degrees of freedom
# Null hypothesis probability = 1.399735e-01
Photon flux (15-150 keV) in 146.1 sec: 0.163666 ( -0.0169837 0.0169943 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36532e-06 ( -1.64184e-07 1.67368e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.508 sec. to 149.612 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66337 ( -0.949875 0.555113 )
Epeak [keV] : 25.9707 ( -23.3908 17.7691 )
Norm@50keV : 2.02501E-03 ( -0.00124295 0.00540873 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.29 using 59 PHA bins.
# Reduced chi-squared = 1.202 for 56 degrees of freedom
# Null hypothesis probability = 1.435166e-01
Photon flux (15-150 keV) in 146.1 sec: 0.160430 ( -0.017619 0.017625 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29738e-06 ( -1.84359e-07 1.94085e-07 ) ergs/cm2
Band function
Time interval is from 3.508 sec. to 149.612 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.65550 ( 1.6555 0.452772 )
beta : -8.82655 ( 8.30635 18.3064 )
Epeak [keV] : 26.0665 ( -8.48142 17.6056 )
Norm@50keV : 2.05021E-03 ( -0.000637024 0.000210467 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.29 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 55 degrees of freedom
# Null hypothesis probability = 1.236314e-01
Photon flux (15-150 keV) in 146.1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.30554e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.91239 (-1.09571 1.24367)
R^2/D10^2 : 0.114718 (-0.0464834 0.0793594)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.62 using 59 PHA bins.
# Reduced chi-squared = 1.520 for 57 degrees of freedom
# Null hypothesis probability = 6.915580e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.579e-07 4.675e-08
25- 50 5.397e-07 7.020e-08
50-150 1.998e-07 6.314e-08
15-150 9.974e-07 1.275e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 49.9403 (-12.3507 19.0437)
Norm : 0.922619 (-0.160082 0.209342)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.68 using 59 PHA bins.
# Reduced chi-squared = 1.187 for 57 degrees of freedom
# Null hypothesis probability = 1.572495e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.295e-07 4.602e-08
25- 50 4.730e-07 5.398e-08
50-150 4.587e-07 1.313e-07
15-150 1.261e-06 1.735e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.14882 (-1.35299 1.58122)
R1^2/D10^2 : 0.730279 (-0.456771 1.77902)
kT2 [keV] : 16.6530 (-4.34575 9.09989)
R2^2/D10^2 : 6.65929E-03 (-0.00563413 0.0182428)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.68 using 59 PHA bins.
# Reduced chi-squared = 1.212 for 55 degrees of freedom
# Null hypothesis probability = 1.344543e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.466e-07 1.704e-07
25- 50 4.449e-07 2.030e-07
50-150 4.824e-07 2.857e-07
15-150 1.274e-06 5.498e-07
Peak spectrum fit
Power-law model
Time interval is from 30.684 sec. to 31.684 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50310 ( -0.625211 0.634018 )
Norm@50keV : 5.00191E-03 ( -0.0016913 0.00167326 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.48 using 59 PHA bins.
# Reduced chi-squared = 0.9382 for 57 degrees of freedom
# Null hypothesis probability = 6.080994e-01
Photon flux (15-150 keV) in 1 sec: 0.624957 ( -0.218247 0.220882 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.74265e-08 ( -1.69075e-08 1.72081e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 30.684 sec. to 31.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20701 ( -4.54253 1.32275 )
Epeak [keV] : 145.076 ( -145.034 -145.034 )
Norm@50keV : 6.89942E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.44 using 59 PHA bins.
# Reduced chi-squared = 0.9543 for 56 degrees of freedom
# Null hypothesis probability = 5.724276e-01
Photon flux (15-150 keV) in 1 sec: 0.615094 ( -0.24929 0.22772 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.67336e-08 ( -1.81236e-08 1.77323e-08 ) ergs/cm2
Band function
Time interval is from 30.684 sec. to 31.684 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.997977 ( 0.998066 0.998066 )
beta : -1.97726 ( 1.90652 3.68148 )
Epeak [keV] : 104.614 ( -108.957 -108.957 )
Norm@50keV : 8.55785E-03 ( -0.00497083 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.45 using 59 PHA bins.
# Reduced chi-squared = 0.9718 for 55 degrees of freedom
# Null hypothesis probability = 5.340236e-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] : 16.8605 (-5.17629 8.94608)
R^2/D10^2 : 4.74360E-02 (-0.0474389 0.12618)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.61 using 59 PHA bins.
# Reduced chi-squared = 0.9580 for 57 degrees of freedom
# Null hypothesis probability = 5.653405e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.753e-09 1.804e-09
25- 50 1.210e-08 7.460e-09
50-150 2.449e-08 1.622e-08
15-150 3.934e-08 2.489e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 2.56824 (-0.853943 1.13366)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.50 using 59 PHA bins.
# Reduced chi-squared = 0.9386 for 57 degrees of freedom
# Null hypothesis probability = 6.071899e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.395e-09 3.978e-09
25- 50 1.230e-08 7.690e-09
50-150 2.698e-08 1.644e-08
15-150 4.568e-08 2.824e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.80240 (-2.80787 34.8609)
R1^2/D10^2 : 41.3445 (-41.0109 -41.0109)
kT2 [keV] : 19.2215 (-6.22521 14.5091)
R2^2/D10^2 : 2.80872E-02 (-0.0280671 0.0339623)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.95 using 59 PHA bins.
# Reduced chi-squared = 0.9445 for 55 degrees of freedom
# Null hypothesis probability = 5.920293e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.030e-09 3.869e-09
25- 50 1.042e-08 6.240e-09
50-150 2.680e-08 1.766e-08
15-150 4.425e-08 2.510e-08
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07247 ( -0.17709 0.186195 )
Norm@50keV : 1.79544E-03 ( -0.000221683 0.000217597 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.82 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 57 degrees of freedom
# Null hypothesis probability = 3.400070e-01
Photon flux (15-150 keV) in 69.79 sec: 0.278691 ( -0.027959 0.0279852 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16131e-06 ( -1.31327e-07 1.33264e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09009 ( -0.930106 0.770401 )
Epeak [keV] : 39.0523 ( -17.8279 11.7057 )
Norm@50keV : 6.53760E-03 ( -0.00411324 0.0157283 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.87 using 59 PHA bins.
# Reduced chi-squared = 0.9977 for 56 degrees of freedom
# Null hypothesis probability = 4.797991e-01
Photon flux (15-150 keV) in 69.79 sec: 0.268925 ( -0.028878 0.028917 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07351e-06 ( -1.37877e-07 1.45847e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.08971 ( -0.719159 0.96464 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 39.0432 ( -7.88963 11.3129 )
Norm@50keV : 6.54075E-03 ( -0.00411712 0.0157392 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.87 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 55 degrees of freedom
# Null hypothesis probability = 4.419818e-01
Photon flux (15-150 keV) in 69.79 sec: 0.269476 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0784e-06 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 4.31e-07
S(50-100 keV) = 3.79e-07
T90 vs. Hardness ratio plot
T90 = 122.131999969482 sec.
Hardness ratio (energy fluence ratio) = 0.87935
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.949005
Count Ratio (50-100 keV) / (15-25 keV) = 0.436371
Mask shadow pattern
IMX = 5.627998803694407E-01, IMY = 4.374961680509125E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
Spacecraft aspect plot
Bright source in the pre-burst/pre-slew/post-slew images
Pre-burst image of 15-350 keV band
Time interval of the image:
-75.099400 3.508000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4457 -60.5341 6.2 35.2 -149.2 0.2871 1.9 6.6 Cen X-3
186.3474 -62.7943 3.8 27.3 -150.0 0.3872 3.0 8.6 GX 301-2
244.9770 -15.6382 0.6 39.0 -10.1 2.8984 19.0 0.2 Sco X-1
255.7895 -37.9544 4.9 20.4 23.3 0.2603 2.3 11.4 4U 1700-377
256.6028 -36.4879 5.2 22.0 22.7 0.2558 2.2 9.0 GX 349+2
262.9999 -24.5963 15.3 35.1 21.3 0.1264 0.8 9.0 GX 1+4
264.9016 -44.5795 5.9 20.0 51.0 -0.2525 -2.0 10.3 4U 1735-44
270.2050 -25.0763 7.8 37.8 31.4 0.2966 1.5 4.3 GX 5-1
270.3346 -25.7516 7.9 37.3 32.1 0.2955 1.4 1.8 GRS 1758-258
273.9829 -13.8966 7.6 49.3 28.0 -0.6536 -1.5 8.5 GX 17+2
275.8521 -30.2852 43.4 36.3 43.1 -0.0565 -0.3 6.2 H1820-303
285.0893 -24.9352 40.8 45.5 48.1 -0.1378 -0.3 3.0 HT1900.1-2455
263.1550 -33.8851 2.7 27.1 30.4 0.5580 4.3 8.8 GX 354-0
283.3387 -29.1405 2.4 41.2 50.1 1.5365 4.7 ------ UNKNOWN
268.1685 -43.5692 2.9 22.4 52.9 0.5360 3.9 ------ UNKNOWN
256.7454 0.1464 2.3 56.6 1.8 2.9211 4.9 ------ UNKNOWN
186.1867 -55.9752 2.5 28.8 -135.9 0.6047 4.6 ------ UNKNOWN
139.8377 -49.8373 3.1 55.4 -150.2 1.9500 3.7 ------ UNKNOWN
229.0789 -1.0024 2.0 53.7 -31.9 2.7710 5.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
3.508000 73.300600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.5863 -60.5052 5.7 35.1 -149.1 -0.3460 -2.0 10.7 Cen X-3
186.9427 -62.8577 3.5 27.0 -150.1 0.4674 3.3 9.4 GX 301-2
245.0464 -15.8110 0.0 38.9 -9.9 0.2393 1.3 11.0 Sco X-1
256.0417 -37.7483 5.1 20.7 23.4 0.3305 2.3 6.3 4U 1700-377
256.4564 -36.3569 29.5 22.1 22.3 0.0562 0.4 4.1 GX 349+2
262.8691 -24.7861 4.1 34.9 21.2 0.5248 2.8 8.0 GX 1+4
264.6221 -44.4411 5.8 19.9 50.4 0.3093 2.0 5.2 4U 1735-44
270.4107 -25.0135 6.5 37.9 31.6 0.4090 1.8 7.9 GX 5-1
270.4283 -25.6101 0.0 37.4 32.1 -0.2007 -0.9 10.5 GRS 1758-258
274.1059 -14.0567 6.7 49.2 28.3 -0.8881 -1.7 5.9 GX 17+2
276.0853 -30.3669 5.6 36.3 43.5 0.5518 2.1 8.3 H1820-303
285.2219 -25.0446 7.5 45.5 48.3 0.8516 1.5 12.6 HT1900.1-2455
262.9909 -33.6880 24.2 27.2 29.9 0.0727 0.5 8.8 GX 354-0
58.9645 -72.6245 2.3 53.1 159.3 3.6914 5.0 ------ UNKNOWN
157.6475 -84.2043 2.3 35.1 168.8 0.9118 5.0 ------ UNKNOWN
230.4324 -57.2413 2.9 5.1 -150.1 0.4881 4.1 ------ UNKNOWN
234.1219 -25.1256 2.3 29.3 -27.9 0.7544 5.1 ------ UNKNOWN
227.5381 -19.6423 1.0 35.5 -37.9 2.0312 11.5 ------ UNKNOWN
145.2021 -58.7071 2.2 47.1 -156.1 1.3332 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
129.100600 963.055900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2513 -60.6128 8.1 57.2 -167.6 4.9838 1.4 2.0 Cen X-3
186.6994 -62.7471 5.8 51.3 -174.5 4.0188 2.0 1.8 GX 301-2
244.9801 -15.6368 0.2 17.1 62.3 34.8508 48.1 0.2 Sco X-1
255.9857 -37.7985 1.6 30.7 115.4 8.8448 7.2 2.7 4U 1700-377
256.4406 -36.4078 564.7 30.4 112.6 -0.0260 -0.0 0.9 GX 349+2
263.1808 -24.6295 0.0 33.3 88.2 -1.0078 -0.6 11.7 GX 1+4
264.9456 -44.3856 5.3 39.7 120.1 4.9808 2.2 9.5 4U 1735-44
268.4710 -1.5573 4.6 43.9 53.8 7.2433 2.5 8.8 SW J1753.5-0127
262.9892 -33.8349 18.8 34.5 104.7 1.0643 0.6 0.0 GX 354-0
269.6871 -20.3347 2.4 39.5 81.5 13.7070 4.7 ------ UNKNOWN
168.3546 -58.9887 3.6 57.6 -165.4 11.6129 3.2 ------ UNKNOWN
200.3760 -4.4805 3.3 30.5 -80.8 3.7436 3.5 ------ UNKNOWN
175.4627 -29.1936 2.9 48.0 -129.1 15.7953 3.9 ------ UNKNOWN
Plot creation:
Sun Nov 1 14:41:11 EST 2015