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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
231.1451 -22.7376 0.0111 41.5334 15.3097 4.1734030 17.289 TRIG_00303105
Foreground time interval of the image:
-62.232 36.869 (delta_t = 99.101 [sec])
Background time interval of the image:
-239.032 -62.232 (delta_t = 176.800 [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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
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 -62.232 sec. to 78.112 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51318 ( -0.110629 0.110903 )
Norm@50keV : 2.47827E-03 ( -0.000163566 0.000163405 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.63 using 59 PHA bins.
# Reduced chi-squared = 1.379 for 57 degrees of freedom
# Null hypothesis probability = 3.037999e-02
Photon flux (15-150 keV) in 140.3 sec: 0.310495 ( -0.0213102 0.0213734 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.29147e-06 ( -2.31499e-07 2.32561e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -62.232 sec. to 78.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.230016 ( -0.639781 0.556345 )
Epeak [keV] : 69.9110 ( -9.09548 17.1524 )
Norm@50keV : 1.05884E-02 ( -0.00487054 0.0109526 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.46 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 56 degrees of freedom
# Null hypothesis probability = 3.180118e-01
Photon flux (15-150 keV) in 140.3 sec: 0.290610 ( -0.022702 0.02281 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.01467e-06 ( -2.57899e-07 2.60425e-07 ) ergs/cm2
Band function
Time interval is from -62.232 sec. to 78.112 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.229873 ( -0.343235 0.55669 )
beta : -10.00000 ( 10 1.12107e-07 )
Epeak [keV] : 69.8975 ( -7.52376 17.1409 )
Norm@50keV : 1.05908E-02 ( -0.000682387 0.0109641 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.46 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 55 degrees of freedom
# Null hypothesis probability = 2.852649e-01
Photon flux (15-150 keV) in 140.3 sec: 0.289020 ( 6.71098 -0.022854 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.04952e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.0798 (-1.0728 1.17386)
R^2/D10^2 : 3.52487E-02 (-0.00834754 0.0107453)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.59 using 59 PHA bins.
# Reduced chi-squared = 1.344 for 57 degrees of freedom
# Null hypothesis probability = 4.276469e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.352e-07 2.897e-08
25- 50 9.393e-07 7.899e-08
50-150 1.457e-06 1.833e-07
15-150 2.631e-06 1.978e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-51.3835 -199.363)
Norm : 1.27909 (-0.0830424 0.0832037)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.77 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 57 degrees of freedom
# Null hypothesis probability = 1.038686e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.469e-07 3.458e-08
25- 50 8.596e-07 7.225e-08
50-150 1.885e-06 4.878e-07
15-150 3.192e-06 5.317e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.73979 (-3.12563 2.87449)
R1^2/D10^2 : 9.94665E-02 (-0.0453998 0.157103)
kT2 [keV] : 25.4742 (-7.09243 34.3434)
R2^2/D10^2 : 3.40764E-03 (-0.00321758 0.0110725)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.73 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 55 degrees of freedom
# Null hypothesis probability = 3.079070e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.204e-07 1.163e-07
25- 50 9.450e-07 3.430e-07
50-150 1.775e-06 7.986e-07
15-150 3.041e-06 1.111e-06
Peak spectrum fit
Power-law model
Time interval is from 3.776 sec. to 4.776 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14498 ( -0.39165 0.366774 )
Norm@50keV : 9.65464E-03 ( -0.00213598 0.00210728 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.43 using 59 PHA bins.
# Reduced chi-squared = 0.9549 for 57 degrees of freedom
# Null hypothesis probability = 5.720802e-01
Photon flux (15-150 keV) in 1 sec: 1.12526 ( -0.260748 0.264816 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.95378e-08 ( -2.18355e-08 2.19368e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.776 sec. to 4.776 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.570436 ( -2.15537 -0.570442 )
Epeak [keV] : 146.222 ( -146.224 -146.224 )
Norm@50keV : 1.71485E-02 ( -0.00933878 0.109653 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.05 using 59 PHA bins.
# Reduced chi-squared = 0.9652 for 56 degrees of freedom
# Null hypothesis probability = 5.489683e-01
Photon flux (15-150 keV) in 1 sec: 1.09555 ( -0.271056 0.27597 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.75413e-08 ( -2.31993e-08 2.27607e-08 ) ergs/cm2
Band function
Time interval is from 3.776 sec. to 4.776 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.120652 ( 0.341287 0.341287 )
beta : -1.36962 ( 1.45932 0.669695 )
Epeak [keV] : 87.3122 ( -86.596 251.637 )
Norm@50keV : 3.13491E-02 ( -0.0334756 420.347 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.95 using 59 PHA bins.
# Reduced chi-squared = 0.9810 for 55 degrees of freedom
# Null hypothesis probability = 5.146791e-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] : 21.0582 (-4.76671 7.05585)
R^2/D10^2 : 4.52167E-02 (-0.0278694 0.0616002)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.48 using 59 PHA bins.
# Reduced chi-squared = 0.9909 for 57 degrees of freedom
# Null hypothesis probability = 4.944429e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.784e-09 1.874e-09
25- 50 1.948e-08 8.191e-09
50-150 6.441e-08 3.293e-08
15-150 8.767e-08 2.971e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 4.85992 (-1.06391 1.06364)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.87 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.430582e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.211e-08 7.270e-09
25- 50 2.330e-08 1.332e-08
50-150 5.110e-08 3.001e-08
15-150 8.650e-08 5.025e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.1860 (-10.5194 -10.5194)
R1^2/D10^2 : 0.257813 (-0.232727 -0.232727)
kT2 [keV] : 34.1730 (-36.86 -36.86)
R2^2/D10^2 : 7.23959E-03 (-0.00546492 0.0538155)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.05 using 59 PHA bins.
# Reduced chi-squared = 0.9826 for 55 degrees of freedom
# Null hypothesis probability = 5.110969e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.697e-09 4.267e-09
25- 50 2.187e-08 1.249e-08
50-150 6.883e-08 3.696e-08
15-150 9.740e-08 4.697e-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: 1.40456 ( -0.124377 0.123635 )
Norm@50keV : 2.73411E-03 ( -0.000207223 0.000207214 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.04 using 59 PHA bins.
# Reduced chi-squared = 1.580 for 57 degrees of freedom
# Null hypothesis probability = 3.445370e-03
Photon flux (15-150 keV) in 99.1 sec: 0.333309 ( -0.0267013 0.026816 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.61563e-06 ( -2.09752e-07 2.10589e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.185903 ( -0.753191 0.645176 )
Epeak [keV] : 71.6870 ( -9.00572 15.7694 )
Norm@50keV : 1.57960E-02 ( -0.00789434 0.0196005 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.46 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 56 degrees of freedom
# Null hypothesis probability = 1.227196e-01
Photon flux (15-150 keV) in 99.1 sec: 0.309150 ( -0.027886 0.02811 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.37813e-06 ( -2.28019e-07 2.30883e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.186135 ( -0.43916 0.574409 )
beta : -10.00000 ( 10 1.81319e-06 )
Epeak [keV] : 71.6721 ( -7.46006 15.7528 )
Norm@50keV : 1.58024E-02 ( -0.00117085 0.0196298 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.46 using 59 PHA bins.
# Reduced chi-squared = 1.245 for 55 degrees of freedom
# Null hypothesis probability = 1.050078e-01
Photon flux (15-150 keV) in 99.1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.38484e-06 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 8.19e-07
S(50-100 keV) = 1.15e-06
T90 vs. Hardness ratio plot
T90 = 126.312000006437 sec.
Hardness ratio (energy fluence ratio) = 1.40415
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.92136
Count Ratio (50-100 keV) / (15-25 keV) = 1.38048
Mask shadow pattern
IMX = 8.543328397660819E-01, IMY = -2.338748405639205E-01
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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:
-239.032000 -62.232000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9786 -15.6401 0.3 30.1 -1.1 9.0067 45.1 0.1 Sco X-1
254.3264 35.4812 6.2 21.8 173.4 0.3212 1.9 10.5 Her X-1
255.8620 -37.8218 6.5 51.8 -17.9 -0.7492 -1.8 6.1 4U 1700-377
256.6221 -36.3214 10.7 50.4 -18.9 0.4391 1.1 10.9 GX 349+2
262.9886 -24.7345 51.0 40.2 -29.9 0.0545 0.2 1.3 GX 1+4
268.2640 -1.5122 3.4 22.8 -62.3 0.6472 3.3 7.2 SW J1753.5-0127
270.0831 -25.2056 0.0 43.1 -38.6 -0.1707 -0.5 13.3 GX 5-1
270.1280 -25.8716 5.4 43.7 -38.2 -0.6802 -2.1 12.2 GRS 1758-258
273.8705 -13.9863 3.0 35.7 -53.0 1.0325 3.9 8.4 GX 17+2
275.9572 -30.2928 6.5 50.1 -41.3 1.2232 1.8 4.8 H1820-303
288.9773 10.9987 14.5 36.9 -103.3 -0.3608 -0.8 11.0 GRS 1915+105
299.5656 35.1924 1.5 48.3 -138.5 4.4367 7.9 1.3 Cyg X-1
262.9866 -33.8841 8.1 49.0 -26.2 0.5792 1.4 3.0 GX 354-0
279.7263 67.6563 4.0 56.9 179.2 3.0565 2.9 ------ UNKNOWN
281.2548 46.2409 2.4 41.0 -161.5 1.2304 4.8 ------ UNKNOWN
267.2806 -26.5990 1.7 43.3 -34.4 2.0094 6.6 ------ UNKNOWN
282.8961 -20.4108 2.4 46.2 -56.2 3.4292 4.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-62.232000 36.868610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0996 -15.6536 10.4 30.1 -1.4 0.1650 1.1 7.0 Sco X-1
254.2811 35.3444 10.4 21.7 173.3 -0.1483 -1.1 8.6 Her X-1
255.9613 -37.8584 38.8 51.9 -18.0 0.1013 0.3 1.5 4U 1700-377
256.3724 -36.2719 0.0 50.3 -18.6 -0.4730 -1.6 9.6 GX 349+2
263.0198 -24.8440 3.1 40.3 -29.9 0.7524 3.7 5.9 GX 1+4
268.2265 -1.4104 3.9 22.7 -62.4 -0.4275 -2.9 8.9 SW J1753.5-0127
270.2851 -25.0774 491.3 43.1 -38.9 0.0059 0.0 0.1 GX 5-1
270.3010 -25.7441 392.1 43.7 -38.5 0.0078 0.0 0.1 GRS 1758-258
273.8916 -13.9261 7.2 35.6 -53.1 -0.3375 -1.6 9.4 GX 17+2
276.0405 -30.4160 6.0 50.2 -41.3 0.9975 1.9 6.7 H1820-303
288.7070 10.8525 7.0 36.6 -103.0 0.4851 1.6 7.8 GRS 1915+105
299.4255 35.2034 6.2 48.2 -138.5 -0.7542 -1.9 8.1 Cyg X-1
262.8660 -33.8850 7.4 49.0 -26.1 -0.5103 -1.6 6.8 GX 354-0
232.1741 34.3856 2.3 26.9 130.0 0.8127 5.0 ------ UNKNOWN
244.4008 46.9397 2.3 33.6 158.2 0.8676 5.0 ------ UNKNOWN
231.1451 -22.7376 0.7 41.5 15.3 4.1732 17.3 ------ UNKNOWN
239.9667 6.3782 2.8 13.4 44.1 0.5512 4.1 ------ UNKNOWN
285.6902 34.4458 2.5 37.3 -143.0 0.8523 4.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
95.668600 516.368600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.9099 -62.6776 6.7 49.7 10.6 1.6284 1.7 8.9 GX 301-2
244.9723 -15.6389 0.2 14.9 -130.4 23.2652 73.9 0.4 Sco X-1
255.9384 -37.8320 3.1 26.1 -63.3 1.5961 3.7 2.4 4U 1700-377
256.4876 -36.5546 10.4 25.9 -66.3 0.4801 1.1 8.3 GX 349+2
262.9970 -24.6141 29.3 29.2 -94.2 0.1907 0.4 7.9 GX 1+4
264.5835 -44.3533 8.8 34.9 -57.9 -0.6723 -1.3 9.0 4U 1735-44
268.3691 -1.4459 27.4 42.0 -129.4 0.3165 0.4 0.4 SW J1753.5-0127
270.1891 -25.1050 6.4 35.7 -92.5 1.4098 1.8 5.4 GX 5-1
270.1370 -25.7679 33.3 35.6 -91.3 0.2692 0.3 9.1 GRS 1758-258
273.9005 -13.9888 8.8 41.4 -108.8 1.6493 1.3 6.8 GX 17+2
275.9101 -30.3700 225.6 40.5 -83.6 0.0693 0.1 0.8 H1820-303
263.0090 -33.8311 2.5 30.0 -75.5 2.2325 4.6 1.0 GX 354-0
187.1186 -50.8293 4.7 44.0 24.9 2.0944 2.4 ------ UNKNOWN
176.4634 -64.3310 2.1 54.6 11.5 10.0141 5.4 ------ UNKNOWN
199.9153 -55.2276 2.0 39.8 13.2 3.0841 5.9 ------ UNKNOWN
184.8675 -74.8003 3.3 57.3 -1.2 7.3856 3.5 ------ UNKNOWN
264.0291 -24.7910 2.2 30.1 -93.7 2.7321 5.2 ------ UNKNOWN
267.3201 -26.6523 2.7 33.0 -89.9 2.6718 4.4 ------ UNKNOWN
279.7843 -52.0234 3.0 47.2 -53.3 5.6823 3.8 ------ UNKNOWN
Plot creation:
Sun May 31 08:20:52 EDT 2015