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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
287.2992 -27.6778 0.0034 16.7003 -90.6024 2.8883762 56.348 TRIG_00309096
Foreground time interval of the image:
-0.080 10.685 (delta_t = 10.765 [sec])
Background time interval of the image:
-239.016 -0.080 (delta_t = 238.936 [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 0.512000
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 0.512000
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 0.512000
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 -0.080 sec. to 50.336 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52958 ( -0.0523745 0.0523954 )
Norm@50keV : 7.39868E-03 ( -0.000196032 0.000195954 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.38 using 59 PHA bins.
# Reduced chi-squared = 1.322 for 57 degrees of freedom
# Null hypothesis probability = 5.198109e-02
Photon flux (15-150 keV) in 50.42 sec: 0.931188 ( -0.0270238 0.0271126 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.52241e-06 ( -9.97408e-08 9.99738e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.080 sec. to 50.336 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42567 ( -0.211446 0.149592 )
Epeak [keV] : 291.209 ( -291.233 -291.233 )
Norm@50keV : 8.28452E-03 ( -0.00103163 0.00208143 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.63 using 59 PHA bins.
# Reduced chi-squared = 1.333 for 56 degrees of freedom
# Null hypothesis probability = 4.873906e-02
Photon flux (15-150 keV) in 50.42 sec: 0.923336 ( -0.030718 0.030471 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.49175e-06 ( -1.18069e-07 5.55376e-08 ) ergs/cm2
Band function
Time interval is from -0.080 sec. to 50.336 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.566449 ( -0.6512 5.85508 )
beta : -1.59293 ( -0.0997443 0.0792028 )
Epeak [keV] : 50.4693 ( -24.4449 109.298 )
Norm@50keV : 2.93195E-02 ( -0.0294483 436.129 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.01 using 59 PHA bins.
# Reduced chi-squared = 1.291 for 55 degrees of freedom
# Null hypothesis probability = 7.194038e-02
Photon flux (15-150 keV) in 50.42 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] : 15.7066 ( )
R^2/D10^2 : 8.44770E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 360.37 using 59 PHA bins.
# Reduced chi-squared = 6.3223 for 57 degrees of freedom
# Null hypothesis probability = 1.235400e-45
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.181e-07 1.132e-08
25- 50 9.033e-07 3.252e-08
50-150 1.546e-06 8.647e-08
15-150 2.668e-06 8.546e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.77770 (-0.0996702 0.0996691)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.06 using 59 PHA bins.
# Reduced chi-squared = 1.387 for 57 degrees of freedom
# Null hypothesis probability = 2.822487e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.744e-07 1.412e-08
25- 50 9.126e-07 2.697e-08
50-150 2.001e-06 5.899e-08
15-150 3.388e-06 1.006e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.90670 (-0.765418 0.825652)
R1^2/D10^2 : 0.644462 (-0.175173 0.260937)
kT2 [keV] : 30.3189 (-3.6523 5.34211)
R2^2/D10^2 : 6.79956E-03 (-0.0028227 0.00386768)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.81 using 59 PHA bins.
# Reduced chi-squared = 1.451 for 55 degrees of freedom
# Null hypothesis probability = 1.605551e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.131e-07 3.915e-08
25- 50 9.278e-07 5.597e-08
50-150 2.120e-06 2.050e-07
15-150 3.461e-06 2.564e-07
Peak spectrum fit
Power-law model
Time interval is from 1.644 sec. to 2.644 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13034 ( -0.0698127 0.0694003 )
Norm@50keV : 4.74207E-02 ( -0.00186898 0.00186845 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9241 for 57 degrees of freedom
# Null hypothesis probability = 6.380408e-01
Photon flux (15-150 keV) in 1 sec: 5.51778 ( -0.224819 0.225082 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.91099e-07 ( -2.12068e-08 2.12654e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.644 sec. to 2.644 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.743651 ( -0.292455 0.274113 )
Epeak [keV] : 182.090 ( -54.9172 276.598 )
Norm@50keV : 7.10963E-02 ( -0.0173063 0.0244968 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.72 using 59 PHA bins.
# Reduced chi-squared = 0.8342 for 56 degrees of freedom
# Null hypothesis probability = 8.070488e-01
Photon flux (15-150 keV) in 1 sec: 5.41686 ( -0.23516 0.23535 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.80698e-07 ( -2.2889e-08 2.2767e-08 ) ergs/cm2
Band function
Time interval is from 1.644 sec. to 2.644 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.791259 ( -1.04579 4.34625 )
beta : -1.26244 ( 1.26081 0.109896 )
Epeak [keV] : 50.3713 ( -26.5419 143.09 )
Norm@50keV : 0.719158 ( -0.708657 229.356 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.93 using 59 PHA bins.
# Reduced chi-squared = 0.7988 for 55 degrees of freedom
# Null hypothesis probability = 8.578479e-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] : 20.1147 ( )
R^2/D10^2 : 0.253052 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 143.31 using 59 PHA bins.
# Reduced chi-squared = 2.5143 for 57 degrees of freedom
# Null hypothesis probability = 2.215363e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.969e-08 1.610e-09
25- 50 9.846e-08 5.715e-09
50-150 2.956e-07 1.915e-08
15-150 4.137e-07 1.930e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 22.8600 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 148.57 using 59 PHA bins.
# Reduced chi-squared = 2.6065 for 57 degrees of freedom
# Null hypothesis probability = 4.221413e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.692e-08 2.285e-09
25- 50 1.095e-07 4.550e-09
50-150 2.401e-07 1.030e-08
15-150 4.066e-07 1.915e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.94105 (-1.40546 1.62976)
R1^2/D10^2 : 1.93964 (-0.714858 1.27063)
kT2 [keV] : 33.5011 (-4.89172 8.57419)
R2^2/D10^2 : 4.00994E-02 (-0.0208065 0.0286337)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.14 using 59 PHA bins.
# Reduced chi-squared = 0.8025 for 55 degrees of freedom
# Null hypothesis probability = 8.526876e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.665e-08 6.075e-09
25- 50 1.055e-07 1.333e-08
50-150 3.418e-07 6.125e-08
15-150 4.840e-07 8.750e-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: 1.43520 ( -0.0530179 0.0529807 )
Norm@50keV : 1.74315E-02 ( -0.000486325 0.000486292 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.42 using 59 PHA bins.
# Reduced chi-squared = 1.218 for 57 degrees of freedom
# Null hypothesis probability = 1.251428e-01
Photon flux (15-150 keV) in 10.76 sec: 2.14041 ( -0.0644829 0.0646414 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.79981e-06 ( -5.40923e-08 5.42126e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20661 ( -0.217922 0.207364 )
Epeak [keV] : 185.670 ( -65.0348 946.672 )
Norm@50keV : 2.23109E-02 ( -0.00435986 0.00575198 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.87 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 56 degrees of freedom
# Null hypothesis probability = 1.722400e-01
Photon flux (15-150 keV) in 10.76 sec: 2.10607 ( -0.07097 0.07115 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.76873e-06 ( -6.16333e-08 6.13428e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.914364 ( -2.1232 3.54877 )
beta : -1.51086 ( -0.0787732 0.0717536 )
Epeak [keV] : 36.8903 ( -7.78054 63.1771 )
Norm@50keV : 0.657077 ( -0.65401 361.463 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.43 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 55 degrees of freedom
# Null hypothesis probability = 2.860090e-01
Photon flux (15-150 keV) in 10.76 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 8.84e-07
S(50-100 keV) = 1.22e-06
T90 vs. Hardness ratio plot
T90 = 46.3600000143051 sec.
Hardness ratio (energy fluence ratio) = 1.38009
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.43157
Count Ratio (50-100 keV) / (15-25 keV) = 1.02277
Mask shadow pattern
IMX = -3.154197460994845E-03, IMY = 3.000031334939362E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
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:
-239.016000 -0.080000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9793 -15.6510 0.2 24.4 101.7 29.0852 73.8 0.6 Sco X-1
255.9920 -37.8634 0.8 15.7 30.1 3.8463 14.1 1.2 4U 1700-377
256.4768 -36.4483 2.2 14.4 33.2 1.4106 5.1 2.5 GX 349+2
263.0161 -24.8901 8.0 5.2 95.3 -0.4252 -1.4 8.7 GX 1+4
264.8956 -44.6255 0.0 18.5 -1.1 0.4298 1.5 12.4 4U 1735-44
268.4241 -1.4979 4.7 24.8 170.1 0.7234 2.5 4.3 SW J1753.5-0127
270.2547 -25.0364 2.7 2.0 -140.0 1.2664 4.3 3.0 GX 5-1
270.3625 -25.7779 10.6 1.7 -118.3 0.3226 1.1 3.9 GRS 1758-258
274.0066 -13.9546 3.0 13.4 -166.2 1.0893 3.8 4.9 GX 17+2
275.9642 -30.3283 4.7 7.6 -66.1 0.7091 2.5 3.1 H1820-303
284.9650 -25.0426 68.3 14.8 -100.9 -0.0540 -0.2 8.3 HT1900.1-2455
288.8035 10.9399 21.5 42.1 -159.1 0.2858 0.5 0.5 GRS 1915+105
262.8933 -33.7581 6.4 8.9 22.8 0.5218 1.8 6.6 GX 354-0
258.7705 -32.5657 2.4 10.6 42.1 1.3380 4.9 ------ UNKNOWN
266.7974 -27.3312 1.4 1.9 48.2 2.4231 8.2 ------ UNKNOWN
292.2447 -56.4132 2.4 34.5 -32.5 1.7288 4.9 ------ UNKNOWN
312.9417 -19.4465 4.5 41.2 -99.5 4.5716 2.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.080000 10.684600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9785 -15.6938 2.0 24.4 101.6 -0.3733 -5.9 3.2 Sco X-1
256.1557 -37.9089 4.0 15.6 29.7 0.1333 2.9 8.9 4U 1700-377
256.2850 -36.3083 7.6 14.5 34.0 0.0717 1.5 10.0 GX 349+2
262.8603 -24.6593 23.5 5.4 97.2 0.0218 0.5 9.6 GX 1+4
264.8390 -44.6173 7.3 18.5 -1.0 -0.0730 -1.6 10.8 4U 1735-44
268.3140 -1.2931 7.1 25.0 169.9 0.0858 1.6 10.1 SW J1753.5-0127
270.4292 -25.2129 5.0 2.0 -133.2 -0.1070 -2.3 11.2 GX 5-1
270.2268 -25.8843 4.8 1.5 -116.1 -0.1105 -2.4 9.4 GRS 1758-258
273.9221 -14.1763 9.1 13.1 -166.1 -0.0547 -1.3 9.7 GX 17+2
276.0314 -30.4209 108.9 7.7 -65.7 -0.0047 -0.1 6.4 H1820-303
285.1985 -24.9982 4.0 15.0 -100.9 0.1366 2.9 10.0 HT1900.1-2455
288.9177 11.0478 7.5 42.3 -159.0 -0.1182 -1.5 9.3 GRS 1915+105
262.8282 -33.7504 4.0 8.9 23.1 -0.1249 -2.9 9.5 GX 354-0
261.3894 23.4008 2.1 50.2 161.9 0.8482 5.4 ------ UNKNOWN
287.2992 -27.6778 0.2 16.7 -90.6 2.8883 56.3 ------ UNKNOWN
319.5195 -43.7127 3.3 44.4 -62.8 0.6981 3.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
50.084590 352.184600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9987 -37.8360 0.6 28.0 67.0 6.2099 18.2 0.8 4U 1700-377
256.5895 -36.5529 32.6 27.3 69.5 -0.1140 -0.4 10.8 GX 349+2
262.8827 -24.7630 6.0 22.0 98.3 -0.5990 -1.9 7.0 GX 1+4
264.7910 -44.6011 8.2 24.7 47.0 0.4060 1.4 9.3 4U 1735-44
268.4091 -1.4416 5.7 31.9 148.5 0.7968 2.0 2.6 SW J1753.5-0127
270.2838 -25.0762 2.2 15.4 102.1 1.3467 5.3 0.2 GX 5-1
270.2300 -25.7009 5.0 15.3 99.8 0.6211 2.4 4.7 GRS 1758-258
274.1075 -14.0762 2.0 18.3 141.6 1.4200 5.6 6.4 GX 17+2
275.8915 -30.3202 3.1 10.3 78.7 0.8808 3.8 3.3 H1820-303
285.0207 -24.8505 4.4 3.5 150.3 0.6019 2.6 4.3 HT1900.1-2455
288.8397 10.9619 9.9 38.7 -171.3 0.4138 1.2 2.6 GRS 1915+105
262.9023 -33.8327 8.9 21.8 73.8 0.3674 1.3 4.3 GX 354-0
257.1472 14.3043 2.6 51.2 147.6 5.9903 4.5 ------ UNKNOWN
266.8168 -27.3714 1.2 18.1 92.5 2.5919 9.6 ------ UNKNOWN
277.3268 -23.7997 2.1 9.8 117.5 1.3313 5.5 ------ UNKNOWN
348.2448 -46.7216 3.7 50.7 -44.5 5.2914 3.1 ------ UNKNOWN
333.1977 -24.1351 3.8 41.2 -77.9 3.8289 3.1 ------ UNKNOWN
320.9516 4.9619 2.8 46.1 -123.7 5.8598 4.1 ------ UNKNOWN
Plot creation:
Sun May 31 07:49:42 EDT 2015