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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
255.2651 -63.7973 0.0146 32.5188 -56.6097 2.0201033 13.176 TRIG_00654803
Foreground time interval of the image:
-1.476 64.524 (delta_t = 66.000 [sec])
Background time interval of the image:
-172.379 -1.476 (delta_t = 170.903 [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 1.024000
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 1.024000
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 1.024000
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 -1.476 sec. to 64.524 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46989 ( -0.181739 0.183292 )
Norm@50keV : 1.97052E-03 ( -0.000220926 0.000219898 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.66 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 57 degrees of freedom
# Null hypothesis probability = 3.793283e-01
Photon flux (15-150 keV) in 66 sec: 0.244061 ( -0.0269976 0.0270367 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24009e-06 ( -1.51751e-07 1.53619e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.476 sec. to 64.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.159907 ( -1.15323 0.905396 )
Epeak [keV] : 67.5790 ( -13.2616 46.1207 )
Norm@50keV : 9.34685E-03 ( -0.00934716 0.0268954 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.05 using 59 PHA bins.
# Reduced chi-squared = 0.9474 for 56 degrees of freedom
# Null hypothesis probability = 5.871520e-01
Photon flux (15-150 keV) in 66 sec: 0.230807 ( -0.028526 0.028521 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11529e-06 ( -1.67297e-07 1.74365e-07 ) ergs/cm2
Band function
Time interval is from -1.476 sec. to 64.524 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.276704 ( -1.27599 3.63326 )
beta : -2.21274 ( 2.21595 0.593666 )
Epeak [keV] : 57.8218 ( -20.3328 45.2521 )
Norm@50keV : 1.72690E-02 ( -0.0189199 4.21995 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.51 using 59 PHA bins.
# Reduced chi-squared = 0.9547 for 55 degrees of freedom
# Null hypothesis probability = 5.703444e-01
Photon flux (15-150 keV) in 66 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14022e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.4116 (-1.63537 1.91116)
R^2/D10^2 : 3.31446E-02 (-0.0118937 0.0177436)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.22 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 57 degrees of freedom
# Null hypothesis probability = 4.301409e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.567e-08 1.944e-08
25- 50 3.661e-07 5.976e-08
50-150 5.079e-07 1.134e-07
15-150 9.696e-07 1.399e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-71.4876 -199.363)
Norm : 1.00670 (-0.108947 0.108955)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.29 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 57 degrees of freedom
# Null hypothesis probability = 4.644430e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.654e-07 9.134e-08
25- 50 3.183e-07 1.740e-07
50-150 6.980e-07 3.808e-07
15-150 1.182e-06 6.295e-07
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.97 using 59 PHA bins.
#Fit statistic : Chi-Squared = 54.18 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.78 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.76 using 59 PHA bins.
# Reduced chi-squared = 0.9994 for 55 degrees of freedom
# Reduced chi-squared = 0.9850 for 55 degrees of freedom
# Reduced chi-squared = 0.9597 for 55 degrees of freedom
# Reduced chi-squared = 0.9594 for 55 degrees of freedom
# Null hypothesis probability = 4.759536e-01
# Null hypothesis probability = 5.060539e-01
# Null hypothesis probability = 5.597286e-01
# Null hypothesis probability = 5.605032e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.165e-07 2.676e-08
25- 50 3.482e-07 6.475e-08
50-150 5.354e-07 1.244e-07
15-150 1.000e-06 1.640e-07
Peak spectrum fit
Power-law model
Time interval is from 0.592 sec. to 1.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.900447 ( -0.405687 0.366669 )
Norm@50keV : 8.56152E-03 ( -0.00196599 0.00191471 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.80 using 59 PHA bins.
# Reduced chi-squared = 0.9966 for 57 degrees of freedom
# Null hypothesis probability = 4.823938e-01
Photon flux (15-150 keV) in 1 sec: 0.982668 ( -0.221548 0.22356 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.60688e-08 ( -2.14239e-08 2.15631e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.592 sec. to 1.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.490996 ( -2.00217 -0.491062 )
Epeak [keV] : 217.689 ( -217.72 -217.72 )
Norm@50keV : 1.28935E-02 ( -0.00605636 0.0702131 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.59 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 56 degrees of freedom
# Null hypothesis probability = 4.529759e-01
Photon flux (15-150 keV) in 1 sec: 0.968636 ( -0.227185 0.228954 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.46184e-08 ( -2.29377e-08 2.22966e-08 ) ergs/cm2
Band function
Time interval is from 0.592 sec. to 1.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99997 ( -4.99997 -4.99997 )
beta : -1.04989 ( -0.497677 0.473643 )
Epeak [keV] : 35.9157 ( -35.9157 22.7599 )
Norm@50keV : 69.7064 ( -14.7369 1.92788e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.20 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 55 degrees of freedom
# Null hypothesis probability = 4.295385e-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] : 23.6937 (-5.96456 9.79693)
R^2/D10^2 : 2.87682E-02 (-0.0187207 0.043532)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.10 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 57 degrees of freedom
# Null hypothesis probability = 3.988012e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.884e-09 1.424e-09
25- 50 1.591e-08 7.163e-09
50-150 6.660e-08 2.815e-08
15-150 8.540e-08 3.372e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-58.5835 -200)
Norm : 4.05482 (-0.928544 0.928544)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.06 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 57 degrees of freedom
# Null hypothesis probability = 2.164856e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.010e-08 6.150e-09
25- 50 1.944e-08 1.162e-08
50-150 4.263e-08 2.498e-08
15-150 7.217e-08 4.178e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 61.6222 (-62.205 -62.2051)
R1^2/D10^2 : 1.44720E-03 (-0.000581953 0.0265466)
kT2 [keV] : 12.8197 (-10.5977 -12.9947)
R2^2/D10^2 : 0.125350 (-0.11011 33.7311)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.31 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.08 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 55 degrees of freedom
# Reduced chi-squared = 1.020 for 55 degrees of freedom
# Null hypothesis probability = 4.254999e-01
# Null hypothesis probability = 4.340918e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.971e-09 3.138e-09
25- 50 1.795e-08 1.133e-08
50-150 6.784e-08 3.869e-08
15-150 9.076e-08 4.907e-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: 1.46989 ( -0.181739 0.183292 )
Norm@50keV : 1.97052E-03 ( -0.000220926 0.000219898 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.66 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 57 degrees of freedom
# Null hypothesis probability = 3.793283e-01
Photon flux (15-150 keV) in 66 sec: 0.244061 ( -0.0269976 0.0270367 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24009e-06 ( -1.51751e-07 1.53619e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.159907 ( -1.15323 0.905396 )
Epeak [keV] : 67.5790 ( -13.2616 46.1207 )
Norm@50keV : 9.34685E-03 ( -0.00934716 0.0268954 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.05 using 59 PHA bins.
# Reduced chi-squared = 0.9474 for 56 degrees of freedom
# Null hypothesis probability = 5.871520e-01
Photon flux (15-150 keV) in 66 sec: 0.230807 ( -0.028526 0.028521 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11529e-06 ( -1.67297e-07 1.74365e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.276704 ( -1.27599 3.63326 )
beta : -2.21274 ( 2.21595 0.593666 )
Epeak [keV] : 57.8218 ( -20.3328 45.2521 )
Norm@50keV : 1.72690E-02 ( -0.0189199 4.21995 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.51 using 59 PHA bins.
# Reduced chi-squared = 0.9547 for 55 degrees of freedom
# Null hypothesis probability = 5.703444e-01
Photon flux (15-150 keV) in 66 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14022e-06 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 3.02e-07
S(50-100 keV) = 4.36e-07
T90 vs. Hardness ratio plot
T90 = 62.0199999213219 sec.
Hardness ratio (energy fluence ratio) = 1.44371
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 2.36884
Count Ratio (50-100 keV) / (15-25 keV) = 1.54678
Mask shadow pattern
IMX = 3.508595748589869E-01, IMY = 5.323017757531378E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-172.379400 -1.476000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
256.0457 -37.8244 1.7 50.2 -27.0 2.8065 6.7 3.0 4U 1700-377
256.4019 -36.4897 4.4 51.1 -25.6 1.1441 2.6 4.3 GX 349+2
263.0126 -24.7435 64.9 57.7 -11.8 0.1631 0.2 0.2 GX 1+4
264.5630 -44.4116 17.8 41.0 -25.8 -0.1746 -0.6 8.0 4U 1735-44
270.2943 -24.9824 9.7 54.1 -5.1 -0.6381 -1.2 5.8 GX 5-1
270.2563 -25.6619 8.0 53.5 -5.6 0.7157 1.4 5.5 GRS 1758-258
275.8926 -30.4063 6.9 46.9 -3.3 0.5867 1.7 2.9 H1820-303
285.0643 -25.0827 5.1 47.5 9.9 0.9171 2.2 9.9 HT1900.1-2455
263.1007 -33.7591 48.8 50.1 -17.8 0.0874 0.2 7.2 GX 354-0
315.7945 -18.0757 2.3 44.7 50.9 3.6733 5.0 ------ UNKNOWN
42.6830 -33.6637 2.4 52.5 163.8 3.7937 4.8 ------ UNKNOWN
314.4113 -39.9764 2.7 23.7 39.2 0.8967 4.3 ------ UNKNOWN
56.8636 -36.3991 2.8 56.9 177.3 4.9134 4.1 ------ UNKNOWN
271.2885 -21.1976 2.8 56.9 -1.9 3.5728 4.1 ------ UNKNOWN
85.0215 -67.7228 2.8 42.3 -139.9 1.3215 4.2 ------ UNKNOWN
93.3797 -54.7704 4.4 55.3 -145.2 3.1337 2.6 ------ UNKNOWN
118.1173 -70.5013 2.4 46.0 -123.5 3.8284 4.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-1.476000 64.524000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9614 -37.8961 5.3 50.1 -27.1 -0.6017 -2.2 3.3 4U 1700-377
256.3006 -36.4814 8.2 51.1 -25.7 -0.4178 -1.4 7.4 GX 349+2
262.9299 -24.8254 5.8 57.7 -11.9 1.1023 2.0 6.4 GX 1+4
264.6607 -44.3186 3.8 41.0 -25.6 0.5106 3.1 8.6 4U 1735-44
270.3209 -25.0233 3.6 54.1 -5.1 1.2355 3.2 3.9 GX 5-1
270.2516 -25.7466 30.8 53.5 -5.6 0.1293 0.4 2.8 GRS 1758-258
276.0090 -30.2846 24.1 47.0 -3.1 0.1000 0.5 6.6 H1820-303
285.0305 -24.7613 7.3 47.8 10.1 -0.4149 -1.6 9.6 HT1900.1-2455
262.8763 -33.9062 6.1 50.1 -18.1 0.4608 1.9 7.1 GX 354-0
304.6670 -37.9570 2.5 28.5 25.0 0.6302 4.6 ------ UNKNOWN
267.7415 -24.9755 2.5 55.3 -7.6 1.7626 4.6 ------ UNKNOWN
58.6372 -68.2760 2.3 34.6 -149.8 0.6650 5.0 ------ UNKNOWN
277.8179 -75.8608 2.5 22.5 -78.7 0.5816 4.7 ------ UNKNOWN
255.2651 -63.7973 0.9 32.5 -56.6 2.0193 13.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
620.320600 962.255300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4967 35.3723 10.4 54.5 -150.5 -1.5011 -1.1 2.6 Her X-1
299.5926 35.1714 1.0 33.9 164.7 4.8975 11.5 1.8 Cyg X-1
308.1014 40.9328 1.9 25.6 158.5 2.1008 6.0 1.3 Cyg X-3
326.1862 38.2804 4.7 23.5 124.4 0.8349 2.5 2.6 Cyg X-2
356.3466 25.1285 4.5 39.3 76.0 2.9782 2.5 ------ UNKNOWN
301.6755 17.8963 2.7 49.0 151.4 4.6047 4.2 ------ UNKNOWN
43.0256 31.0704 2.7 53.2 20.5 5.7564 4.2 ------ UNKNOWN
27.6611 41.3712 3.1 37.6 25.9 1.7505 3.7 ------ UNKNOWN
284.0790 27.3255 3.3 47.3 176.5 2.3481 3.5 ------ UNKNOWN
53.7404 53.1727 1.1 41.2 -7.2 4.6914 10.8 ------ UNKNOWN
250.4099 72.8963 3.3 31.3 -105.1 1.5009 3.5 ------ UNKNOWN
256.0595 28.6277 3.4 59.4 -156.4 8.8333 3.4 ------ UNKNOWN
249.4863 37.2688 6.0 55.3 -145.2 4.1193 1.9 ------ UNKNOWN
105.6046 62.8441 3.5 50.6 -44.7 5.3772 3.3 ------ UNKNOWN
241.8838 50.6772 3.1 48.1 -129.2 4.9038 3.8 ------ UNKNOWN
Plot creation:
Wed Sep 30 11:01:19 EDT 2015