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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.1941 3.5383 0.0187 37.4716 -36.5709 1.2662129 10.261 TRIG_00528443
Foreground time interval of the image:
-20.052 35.781 (delta_t = 55.833 [sec])
Background time interval of the image:
-239.320 -20.052 (delta_t = 219.268 [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 4.096000
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 4.096000
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 4.096000
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)
The mask-weighted light curves based on cleaned DPHs
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 -20.052 sec. to 78.580 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.43087 ( -0.24791 0.27029 )
Norm@50keV : 8.25811E-04 ( -0.000161259 0.00015979 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.12 using 59 PHA bins.
# Reduced chi-squared = 0.9144 for 57 degrees of freedom
# Null hypothesis probability = 6.583683e-01
Photon flux (15-150 keV) in 98.63 sec: 0.155601 ( -0.0202699 0.0202761 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.00254e-07 ( -1.21553e-07 1.2537e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -20.052 sec. to 78.580 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.746961 ( -1.68606 1.05642 )
Epeak [keV] : 26.7278 ( -25.6719 7.49815 )
Norm@50keV : 9.45777E-03 ( -0.00945711 0.10851 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.25 using 59 PHA bins.
# Reduced chi-squared = 0.8259 for 56 degrees of freedom
# Null hypothesis probability = 8.204758e-01
Photon flux (15-150 keV) in 98.63 sec: 0.149246 ( -0.020449 0.020549 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.07324e-07 ( -1.13521e-07 1.28946e-07 ) ergs/cm2
Band function
Time interval is from -20.052 sec. to 78.580 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.747343 ( -1.29888 1.30096 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 26.7195 ( -10.8005 7.51528 )
Norm@50keV : 9.45312E-03 ( -0.00945311 0.108739 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.25 using 59 PHA bins.
# Reduced chi-squared = 0.8409 for 55 degrees of freedom
# Null hypothesis probability = 7.935740e-01
Photon flux (15-150 keV) in 98.63 sec: 0.150123 ( 6.84988 -0.021437 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.05863e-07 ( -7.05173e-07 -1.12968e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.80812 (-1.04916 1.19256)
R^2/D10^2 : 0.189277 (-0.0842661 0.155597)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.23 using 59 PHA bins.
# Reduced chi-squared = 0.8987 for 57 degrees of freedom
# Null hypothesis probability = 6.904416e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.020e-07 4.631e-08
25- 50 3.388e-07 6.963e-08
50-150 8.208e-08 3.530e-08
15-150 6.229e-07 1.205e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 34.4754 (-8.71863 12.9175)
Norm : 1.12847 (-0.261886 0.356233)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.77 using 59 PHA bins.
# Reduced chi-squared = 0.8205 for 57 degrees of freedom
# Null hypothesis probability = 8.312408e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.416e-07 4.123e-08
25- 50 2.969e-07 5.070e-08
50-150 1.936e-07 8.109e-08
15-150 7.321e-07 1.282e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.66132 (-2.1049 2.3968)
R1^2/D10^2 : 0.928210 (-0.69212 10.601)
kT2 [keV] : 11.4921 (-5.09339 10.4532)
R2^2/D10^2 : 2.59286E-02 (-0.0249451 0.108537)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.64 using 59 PHA bins.
# Reduced chi-squared = 0.8299 for 55 degrees of freedom
# Null hypothesis probability = 8.116546e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.378e-07 1.260e-07
25- 50 3.036e-07 1.546e-07
50-150 1.663e-07 1.013e-07
15-150 7.078e-07 3.626e-07
Peak spectrum fit
Power-law model
Time interval is from 7.560 sec. to 8.560 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.01899 ( -0.454128 0.490746 )
Norm@50keV : 4.74929E-03 ( -0.0015872 0.00155544 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.95 using 59 PHA bins.
# Reduced chi-squared = 0.7711 for 57 degrees of freedom
# Null hypothesis probability = 8.972684e-01
Photon flux (15-150 keV) in 1 sec: 0.718865 ( -0.210722 0.211867 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.38133e-08 ( -1.36538e-08 1.41319e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.560 sec. to 8.560 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.20507 ( -4.88105 2.57132 )
Epeak [keV] : 39.2935 ( -10.241 13.4521 )
Norm@50keV : 0.379555 ( -0.479827 390.631 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.95 using 59 PHA bins.
# Reduced chi-squared = 0.6955 for 56 degrees of freedom
# Null hypothesis probability = 9.596648e-01
Photon flux (15-150 keV) in 1 sec: 0.669373 ( -0.204747 0.210783 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.65554e-08 ( -1.10858e-08 1.30247e-08 ) ergs/cm2
Band function
Time interval is from 7.560 sec. to 8.560 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98691 ( -6.28204 -4.98691 )
beta : -2.90310 ( 2.9031 0.849561 )
Epeak [keV] : 31.0943 ( -7.86034 8.6193 )
Norm@50keV : 222.062 ( -59.7333 1223.84 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.86 using 59 PHA bins.
# Reduced chi-squared = 0.7066 for 55 degrees of freedom
# Null hypothesis probability = 9.511627e-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] : 10.0773 (-2.22236 2.93632)
R^2/D10^2 : 0.359093 (-0.232705 0.603941)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.99 using 59 PHA bins.
# Reduced chi-squared = 0.6841 for 57 degrees of freedom
# Null hypothesis probability = 9.672567e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.446e-09 4.598e-09
25- 50 1.871e-08 1.091e-08
50-150 9.987e-09 6.242e-09
15-150 3.615e-08 1.756e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.0329 (-26.1099 82.0856)
Norm : 4.01442 (-1.53357 2.27806)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.62 using 59 PHA bins.
# Reduced chi-squared = 0.7301 for 57 degrees of freedom
# Null hypothesis probability = 9.372113e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.000e-08 4.770e-09
25- 50 1.498e-08 8.044e-09
50-150 1.633e-08 1.167e-08
15-150 4.132e-08 2.085e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.87723 (-7.8384 -7.8384)
R1^2/D10^2 : 0.374028 (-0.368899 -0.368899)
kT2 [keV] : 11.7139 (-11.589 -11.589)
R2^2/D10^2 : 0.127364 (-0.169735 -0.169735)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.95 using 59 PHA bins.
# Reduced chi-squared = 0.7082 for 55 degrees of freedom
# Null hypothesis probability = 9.501120e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.835e-09 3.300e-07
25- 50 1.834e-08 2.502e-06
50-150 1.092e-08 2.619e-05
15-150 3.709e-08 4.045e-05
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: 2.43863 ( -0.251359 0.273664 )
Norm@50keV : 1.13551E-03 ( -0.000227249 0.000225942 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.75 using 59 PHA bins.
# Reduced chi-squared = 0.9605 for 57 degrees of freedom
# Null hypothesis probability = 5.600831e-01
Photon flux (15-150 keV) in 55.83 sec: 0.214946 ( -0.0289857 0.0289951 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.24017e-07 ( -9.75451e-08 1.00671e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 9.74036E-02 ( -2.36417 1.57415 )
Epeak [keV] : 27.7979 ( -12.8174 5.57426 )
Norm@50keV : 3.66130E-02 ( -0.040981 1.4792 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.72 using 59 PHA bins.
# Reduced chi-squared = 0.8343 for 56 degrees of freedom
# Null hypothesis probability = 8.069263e-01
Photon flux (15-150 keV) in 55.83 sec: 0.204235 ( -0.029121 0.029303 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.29533e-07 ( -8.64656e-08 1.00693e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.38236 ( -5.3251 -3.75227 )
beta : -3.21182 ( -4.4942 0.620288 )
Epeak [keV] : 26.1628 ( -5.18147 7.47809 )
Norm@50keV : 2.67603 ( -2.67313 105.715 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.33 using 59 PHA bins.
# Reduced chi-squared = 0.8424 for 55 degrees of freedom
# Null hypothesis probability = 7.909404e-01
Photon flux (15-150 keV) in 55.83 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.66708e-07 ( -5.66317e-07 -1.1474e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.63e-07
S(50-100 keV) = 1.95e-07
T90 vs. Hardness ratio plot
T90 = 77.9239999651909 sec.
Hardness ratio (energy fluence ratio) = 0.741445
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.842815
Count Ratio (50-100 keV) / (15-25 keV) = 0.251026
Mask shadow pattern
IMX = 6.156228488082388E-01, IMY = 4.567163788541667E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
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:
-239.320000 -20.052000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9660 -15.6378 0.4 24.5 -64.7 6.7828 31.0 0.8 Sco X-1
255.9892 -37.8593 1.5 15.7 -136.3 1.3008 7.9 0.9 4U 1700-377
256.4318 -36.3586 3.4 14.4 -133.0 0.5671 3.3 3.9 GX 349+2
262.9629 -24.7535 4.1 5.3 -70.0 0.4997 2.8 2.6 GX 1+4
264.9389 -44.3839 5.9 18.3 -167.6 0.3373 2.0 9.3 4U 1735-44
268.3019 -1.4217 4.2 24.9 3.4 0.5185 2.8 4.4 SW J1753.5-0127
270.1093 -24.9446 133.3 1.9 49.2 0.0148 0.1 12.5 GX 5-1
270.1504 -25.9050 0.0 1.5 77.9 -0.1776 -1.0 12.7 GRS 1758-258
274.0485 -14.1079 2.9 13.2 27.8 0.7219 4.0 5.0 GX 17+2
275.9152 -30.2659 6.6 7.6 127.3 0.2994 1.7 6.1 H1820-303
285.2081 -25.0369 42.8 15.0 92.9 -0.0478 -0.3 11.7 HT1900.1-2455
288.7795 10.9451 1.7 42.1 34.4 2.6972 6.8 1.1 GRS 1915+105
263.0780 -33.8371 4.7 8.9 -144.8 0.4377 2.5 4.4 GX 354-0
298.4104 9.2218 2.9 45.8 47.3 2.9596 4.0 ------ UNKNOWN
291.0058 19.6462 3.1 50.9 31.7 3.8516 3.8 ------ UNKNOWN
265.7048 -28.4091 2.8 3.3 -125.7 0.6758 4.1 ------ UNKNOWN
260.3105 26.3055 2.6 53.2 -5.2 2.1859 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-20.052000 35.780600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8327 -15.5767 3.7 24.6 -64.8 -0.3239 -3.1 9.3 Sco X-1
255.9956 -37.8434 3.5 15.7 -136.3 0.2599 3.3 0.4 4U 1700-377
256.6152 -36.5646 18.1 14.4 -134.0 0.0488 0.6 12.1 GX 349+2
262.8396 -24.6007 0.0 5.5 -68.9 -0.1235 -1.6 12.7 GX 1+4
264.5862 -44.5646 10.2 18.5 -166.9 0.0872 1.1 9.6 4U 1735-44
268.4923 -1.2943 0.0 25.0 3.8 -0.1523 -1.7 12.1 SW J1753.5-0127
270.3975 -24.9201 12.1 2.1 53.7 -0.0728 -1.0 11.4 GX 5-1
270.2249 -25.7696 7.3 1.6 73.8 0.1239 1.6 4.5 GRS 1758-258
273.8741 -14.1981 5.2 13.1 27.3 0.1742 2.2 12.4 GX 17+2
275.7315 -30.2392 0.0 7.4 127.7 0.0231 0.3 12.6 H1820-303
284.9231 -25.0149 6.5 14.8 92.6 -0.1550 -1.8 8.4 HT1900.1-2455
288.9694 10.8054 0.0 42.1 34.8 -0.0208 -0.1 13.1 GRS 1915+105
263.0177 -33.7638 10.2 8.9 -144.3 0.0873 1.1 4.5 GX 354-0
271.0477 -50.2120 2.4 24.0 -179.8 0.3820 4.9 ------ UNKNOWN
264.1968 19.5757 2.3 46.1 -1.7 0.7610 5.0 ------ UNKNOWN
258.0443 -53.1768 2.2 28.0 -162.4 0.4386 5.4 ------ UNKNOWN
245.1941 3.5383 1.1 37.5 -36.6 1.2663 10.3 ------ UNKNOWN
242.8152 0.9756 1.8 36.9 -42.3 0.7824 6.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
97.780590 962.728400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9852 -15.6416 0.2 19.2 156.4 31.8344 62.1 0.3 Sco X-1
254.5075 35.1567 0.0 32.8 -10.2 -0.1806 -0.3 11.4 Her X-1
255.9883 -37.8285 2.2 42.5 143.1 8.8252 5.1 0.9 4U 1700-377
256.3629 -36.5279 9.8 41.4 142.1 1.9383 1.2 7.2 GX 349+2
263.1001 -24.9026 13.4 33.3 125.2 -0.8674 -0.9 10.6 GX 1+4
268.4212 -1.5009 3.7 23.7 77.5 1.9064 3.1 4.3 SW J1753.5-0127
270.0849 -25.1572 2.9 37.5 116.9 -5.2694 -4.0 11.8 GX 5-1
270.4513 -25.7480 6.8 38.1 117.2 2.4448 1.7 8.0 GRS 1758-258
274.0146 -13.9992 8.3 33.5 97.8 1.6389 1.4 2.3 GX 17+2
288.8161 10.9225 2.7 43.8 53.5 9.5818 4.3 1.7 GRS 1915+105
262.8571 -33.7674 23.5 40.8 133.0 -0.8672 -0.5 7.7 GX 354-0
273.6295 33.2088 3.2 39.8 14.1 2.9171 3.6 ------ UNKNOWN
261.3945 17.5403 2.7 21.2 23.0 2.1898 4.2 ------ UNKNOWN
217.4596 -43.4626 2.8 53.2 -179.4 7.1211 4.1 ------ UNKNOWN
210.8660 4.8138 2.4 34.3 -110.9 4.9028 4.8 ------ UNKNOWN
245.2197 62.4531 3.3 58.9 -24.3 14.9835 3.6 ------ UNKNOWN
198.6456 -8.3761 3.3 48.0 -128.9 9.4021 3.5 ------ UNKNOWN
Plot creation:
Sat May 30 19:06:16 EDT 2015