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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
265.6909 1.6051 0.0023 13.6157 -84.0718 7.2529527 84.031 TRIG_00506903
Foreground time interval of the image:
-6.548 12.413 (delta_t = 18.961 [sec])
Background time interval of the image:
-239.488 -6.548 (delta_t = 232.940 [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)
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 -6.548 sec. to 250.780 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41459 ( -0.0483438 0.048216 )
Norm@50keV : 3.19188E-03 ( -7.85227e-05 7.8499e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.47 using 59 PHA bins.
# Reduced chi-squared = 0.9029 for 57 degrees of freedom
# Null hypothesis probability = 6.818615e-01
Photon flux (15-150 keV) in 257.3 sec: 0.390018 ( -0.0108544 0.0109131 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.91236e-06 ( -2.02793e-07 2.03139e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.548 sec. to 250.780 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40406 ( -0.162524 0.0502395 )
Epeak [keV] : 9495.65 ( -9999.32 -9999.32 )
Norm@50keV : 3.22620E-03 ( -7.78998e-05 0.000519095 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.79 using 59 PHA bins.
# Reduced chi-squared = 0.9248 for 56 degrees of freedom
# Null hypothesis probability = 6.348991e-01
Photon flux (15-150 keV) in 257.3 sec: 0.390017 ( -0.005753 0.010533 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.91133e-06 ( -1.96654e-07 2.0198e-07 ) ergs/cm2
Band function
Time interval is from -6.548 sec. to 250.780 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.59603 ( -1.59632 -1.59632 )
beta : -1.43348 ( -0.0558923 0.0537284 )
Epeak [keV] : 28.0347 ( -28.0338 97.5964 )
Norm@50keV : 0.644021 ( -0.645241 177.961 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.27 using 59 PHA bins.
# Reduced chi-squared = 0.8959 for 55 degrees of freedom
# Null hypothesis probability = 6.922116e-01
Photon flux (15-150 keV) in 257.3 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] : 18.2487 ( )
R^2/D10^2 : 2.17932E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 426.41 using 59 PHA bins.
# Reduced chi-squared = 7.4809 for 57 degrees of freedom
# Null hypothesis probability = 5.612416e-58
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.722e-07 1.994e-08
25- 50 1.739e-06 6.664e-08
50-150 4.218e-06 1.698e-07
15-150 6.329e-06 1.711e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 1.62918 (-0.0401508 0.0401324)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 95.34 using 59 PHA bins.
# Reduced chi-squared = 1.673 for 57 degrees of freedom
# Null hypothesis probability = 1.097568e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.044e-06 2.920e-08
25- 50 2.009e-06 5.738e-08
50-150 4.405e-06 1.261e-07
15-150 7.458e-06 2.046e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.71533 (-0.676044 0.732208)
R1^2/D10^2 : 0.281859 (-0.0748985 0.108114)
kT2 [keV] : 31.9649 (-2.94603 3.89308)
R2^2/D10^2 : 2.74343E-03 (-0.000860442 0.00106758)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.00 using 59 PHA bins.
# Reduced chi-squared = 0.9999 for 55 degrees of freedom
# Null hypothesis probability = 4.748064e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.673e-07 7.487e-08
25- 50 1.932e-06 9.739e-08
50-150 5.106e-06 3.306e-07
15-150 7.905e-06 4.040e-07
Peak spectrum fit
Power-law model
Time interval is from 5.476 sec. to 6.476 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16762 ( -0.0616049 0.061414 )
Norm@50keV : 6.14101E-02 ( -0.00213163 0.00213156 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.97 using 59 PHA bins.
# Reduced chi-squared = 0.8942 for 57 degrees of freedom
# Null hypothesis probability = 6.995474e-01
Photon flux (15-150 keV) in 1 sec: 7.17717 ( -0.256778 0.256983 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.28875e-07 ( -2.42875e-08 2.43524e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.476 sec. to 6.476 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.838245 ( -0.258924 0.244584 )
Epeak [keV] : 193.747 ( -61.7348 358.291 )
Norm@50keV : 8.73599E-02 ( -0.0196567 0.0270685 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.59 using 59 PHA bins.
# Reduced chi-squared = 0.8141 for 56 degrees of freedom
# Null hypothesis probability = 8.383933e-01
Photon flux (15-150 keV) in 1 sec: 7.06760 ( -0.26852 0.26861 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.1657e-07 ( -2.6445e-08 2.6302e-08 ) ergs/cm2
Band function
Time interval is from 5.476 sec. to 6.476 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.881553 ( -1.83294 -1.2261 )
beta : -1.29686 ( -0.136554 0.0959977 )
Epeak [keV] : 47.4521 ( -10.9275 66.5838 )
Norm@50keV : 1.17190 ( -1.16411 591.556 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.75 using 59 PHA bins.
# Reduced chi-squared = 0.7228 for 55 degrees of freedom
# Null hypothesis probability = 9.394422e-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] : 18.9731 ( )
R^2/D10^2 : 0.394296 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 178.43 using 59 PHA bins.
# Reduced chi-squared = 3.1304 for 57 degrees of freedom
# Null hypothesis probability = 1.949034e-14
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.791e-08 1.860e-09
25- 50 1.341e-07 6.500e-09
50-150 3.547e-07 2.215e-08
15-150 5.168e-07 2.335e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 29.6307 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 152.22 using 59 PHA bins.
# Reduced chi-squared = 2.6705 for 57 degrees of freedom
# Null hypothesis probability = 1.309750e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.378e-08 2.900e-09
25- 50 1.419e-07 5.450e-09
50-150 3.113e-07 1.145e-08
15-150 5.270e-07 1.890e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.58731 (-1.33299 1.4791)
R1^2/D10^2 : 2.23479 (-0.703581 1.15612)
kT2 [keV] : 37.0869 (-6.32784 12.2279)
R2^2/D10^2 : 3.58041E-02 (-0.0205288 0.0307606)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.03 using 59 PHA bins.
# Reduced chi-squared = 0.7641 for 55 degrees of freedom
# Null hypothesis probability = 9.006415e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.788e-08 5.810e-09
25- 50 1.410e-07 1.405e-08
50-150 4.321e-07 8.600e-08
15-150 6.210e-07 1.022e-07
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: 1.22991 ( -0.0345238 0.0344065 )
Norm@50keV : 2.51792E-02 ( -0.000465343 0.00046451 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.54 using 59 PHA bins.
# Reduced chi-squared = 0.9744 for 57 degrees of freedom
# Null hypothesis probability = 5.299771e-01
Photon flux (15-150 keV) in 18.96 sec: 2.96857 ( -0.060558 0.0607086 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.8035e-06 ( -8.89118e-08 8.89505e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15439 ( -0.135978 0.0878779 )
Epeak [keV] : 675.702 ( -675.74 -675.74 )
Norm@50keV : 2.70758E-02 ( -0.00212782 0.00367214 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.60 using 59 PHA bins.
# Reduced chi-squared = 0.9750 for 56 degrees of freedom
# Null hypothesis probability = 5.279085e-01
Photon flux (15-150 keV) in 18.96 sec: 2.95175 ( -0.06657 0.03361 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.78894e-06 ( -9.40795e-08 9.16906e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.576983 ( -1.42176 -0.681979 )
beta : -1.26049 ( -0.0516418 0.0424382 )
Epeak [keV] : 41.8131 ( -13.6533 65.3414 )
Norm@50keV : 0.413972 ( -0.413153 520.211 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.66 using 59 PHA bins.
# Reduced chi-squared = 0.9029 for 55 degrees of freedom
# Null hypothesis probability = 6.782128e-01
Photon flux (15-150 keV) in 18.96 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) = 1.87e-06
S(50-100 keV) = 2.81e-06
T90 vs. Hardness ratio plot
T90 = 144.775999963284 sec.
Hardness ratio (energy fluence ratio) = 1.50267
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.39966
Count Ratio (50-100 keV) / (15-25 keV) = 1.11186
Mask shadow pattern
IMX = 2.501653598879804E-02, IMY = 2.409202475006707E-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:
-239.488000 -6.548000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9904 -15.6501 0.5 39.0 -106.2 16.0478 24.8 0.9 Sco X-1
254.5346 35.5325 726.1 39.1 -18.1 0.0041 0.0 12.0 Her X-1
256.0209 -37.8542 2.4 46.8 -140.4 2.7899 4.9 1.7 4U 1700-377
256.3290 -36.3815 5.6 45.4 -139.5 -1.0551 -2.1 5.7 GX 349+2
262.9185 -24.7362 6.3 32.5 -137.4 0.4552 1.8 5.0 GX 1+4
264.7464 -44.4692 467.8 49.9 -152.1 0.0123 0.0 1.2 4U 1735-44
268.4152 -1.3715 7.0 11.9 -100.7 0.3412 1.7 5.6 SW J1753.5-0127
270.2144 -25.0238 4.1 30.0 -149.2 0.6116 2.8 5.0 GX 5-1
270.3534 -25.7461 3.7 30.7 -149.9 0.6915 3.1 2.8 GRS 1758-258
274.0655 -14.0773 1.9 18.5 -149.8 1.2273 6.1 4.3 GX 17+2
275.8303 -30.5320 0.0 34.4 -160.5 0.1437 0.6 11.0 H1820-303
285.1399 -24.7740 3.7 29.1 -176.8 0.7269 3.1 10.5 HT1900.1-2455
288.7638 10.9747 1.7 12.0 66.6 1.1931 6.6 2.7 GRS 1915+105
299.5427 35.1729 2.0 36.7 42.9 2.0079 5.8 2.9 Cyg X-1
308.1226 41.0619 4.1 45.5 45.2 2.6100 2.8 6.6 Cyg X-3
263.0715 -33.8629 2.7 40.5 -144.8 1.3585 4.2 4.4 GX 354-0
312.2583 -1.9139 2.5 33.6 113.5 1.8345 4.6 ------ UNKNOWN
293.7818 49.0780 3.0 47.1 27.5 2.3477 3.9 ------ UNKNOWN
268.1324 10.5323 2.6 12.9 -43.0 0.7735 4.4 ------ UNKNOWN
270.4429 -20.5118 2.8 25.7 -146.4 0.8517 4.2 ------ UNKNOWN
267.6127 -50.5985 2.9 55.2 -156.7 2.9999 4.0 ------ UNKNOWN
UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-6.548000 12.412600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1141 -15.7345 4.4 38.9 -106.4 0.6483 2.6 9.6 Sco X-1
254.5789 35.4263 60.1 39.0 -18.1 -0.0240 -0.2 7.8 Her X-1
255.9961 -37.9307 3.1 46.8 -140.4 -0.8028 -3.7 5.2 4U 1700-377
256.4952 -36.4284 5.5 45.4 -139.7 -0.4228 -2.1 2.9 GX 349+2
262.9612 -24.7149 10.9 32.5 -137.4 -0.1163 -1.1 3.2 GX 1+4
264.5820 -44.4217 7.5 49.9 -152.0 0.3289 1.5 7.1 4U 1735-44
268.3673 -1.4456 34.8 12.0 -100.9 0.0270 0.3 0.4 SW J1753.5-0127
270.0992 -24.9901 5.5 30.0 -149.0 0.2062 2.1 11.4 GX 5-1
270.2534 -25.8053 4.3 30.7 -149.7 -0.2726 -2.7 4.6 GRS 1758-258
274.0586 -14.0398 46.6 18.5 -149.7 -0.0213 -0.2 3.1 GX 17+2
275.9072 -30.4123 4.4 34.3 -160.6 -0.2607 -2.6 2.9 H1820-303
285.1980 -24.9572 6.7 29.3 -176.8 -0.1673 -1.7 9.1 HT1900.1-2455
288.8112 11.0993 4.7 12.1 66.2 -0.2078 -2.4 9.3 GRS 1915+105
299.7658 35.1823 16.5 36.8 43.1 -0.1113 -0.7 8.7 Cyg X-1
308.3262 40.8165 9.4 45.4 45.6 -0.5301 -1.2 12.8 Cyg X-3
263.0439 -33.9298 8.8 40.6 -144.8 -0.1825 -1.3 6.3 GX 354-0
302.3673 30.1959 2.7 34.4 51.5 0.6863 4.3 ------ UNKNOWN
264.0222 32.6952 2.4 32.3 -9.9 0.4561 4.9 ------ UNKNOWN
265.6909 1.6051 0.1 13.6 -84.1 7.2534 84.2 ------ UNKNOWN
255.6891 -36.7235 2.2 46.0 -139.2 1.0652 5.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
48.412600 384.112600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9826 -15.6371 0.2 26.8 -109.4 22.5591 53.1 0.3 Sco X-1
254.4707 35.3493 136.9 35.3 5.5 0.0348 0.1 0.8 Her X-1
255.9355 -37.8782 2.0 40.5 -146.6 2.9653 5.9 3.2 4U 1700-377
256.4390 -36.4295 23.1 39.0 -146.7 0.2488 0.5 0.4 GX 349+2
262.9754 -24.7512 3.5 26.5 -153.0 1.0938 3.3 1.9 GX 1+4
264.7200 -44.6033 25.7 46.2 -157.6 -0.2937 -0.4 9.2 4U 1735-44
268.4048 -1.5204 18.7 4.1 160.7 0.1829 0.6 4.6 SW J1753.5-0127
270.4421 -25.0704 6.3 27.1 -168.0 0.5765 1.8 8.6 GX 5-1
270.3186 -25.7746 4.4 27.7 -167.5 0.8124 2.6 2.1 GRS 1758-258
273.9688 -13.9575 2.7 17.6 174.0 1.2759 4.3 5.2 GX 17+2
275.8561 -30.3534 5.5 33.4 -174.6 0.7881 2.1 3.7 H1820-303
285.1829 -24.9070 11.5 32.5 167.3 -0.4432 -1.0 8.0 HT1900.1-2455
288.8026 10.9747 1.0 24.8 88.3 5.1196 11.4 1.8 GRS 1915+105
262.9472 -33.8491 2.2 35.6 -154.6 1.9989 5.3 2.3 GX 354-0
289.7506 42.7374 3.7 46.4 45.8 4.7088 3.1 ------ UNKNOWN
288.0901 13.6935 3.2 25.2 81.7 1.4773 3.6 ------ UNKNOWN
265.7373 1.6404 1.1 0.0 59.0 3.1680 10.9 ------ UNKNOWN
229.8815 -20.6236 3.8 41.5 -102.8 4.9004 3.0 ------ UNKNOWN
Plot creation:
Sat May 30 21:11:21 EDT 2015