Special notes of this burst
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
244.8732 -5.2938 0.0271 28.2165 -48.1356 0.2242511 7.095 TRIG_00911609
Foreground time interval of the image:
-0.012 2.944 (delta_t = 2.956 [sec])
Background time interval of the image:
-239.272 -0.012 (delta_t = 239.260 [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 2.048000
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 2.048000
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 2.048000
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 -0.012 sec. to 2.944 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.57525 ( -0.373385 0.437845 )
Norm@50keV : 3.90192E-03 ( -0.00123524 0.0012414 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.98 using 59 PHA bins.
# Reduced chi-squared = 0.9822 for 57 degrees of freedom
# Null hypothesis probability = 5.132147e-01
Photon flux (15-150 keV) in 2.956 sec: 0.803385 ( -0.149226 0.149261 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1786e-07 ( -2.66702e-08 2.81679e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.012 sec. to 2.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47581 ( -2.20014 0.528009 )
Epeak [keV] : 16.4707 ( )
Norm@50keV : 2.01258E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.48 using 59 PHA bins.
# Reduced chi-squared = 0.9729 for 56 degrees of freedom
# Null hypothesis probability = 5.325265e-01
Photon flux (15-150 keV) in 2.956 sec: 0.787945 ( -0.148271 0.149219 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.012 sec. to 2.944 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 6.58777 (-1.42798 1.89386)
R^2/D10^2 : 1.94497 (-1.26148 3.66047)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.14 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 57 degrees of freedom
# Null hypothesis probability = 3.972846e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.747e-08 1.470e-08
25- 50 4.549e-08 1.720e-08
50-150 6.021e-09 3.901e-09
15-150 8.898e-08 3.439e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.1764 (-10.235 17.3912)
Norm : 6.66366 (-2.22498 3.81406)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.49 using 59 PHA bins.
# Reduced chi-squared = 0.9560 for 57 degrees of freedom
# Null hypothesis probability = 5.697923e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.951e-08 1.040e-08
25- 50 4.445e-08 1.368e-08
50-150 2.346e-08 1.494e-08
15-150 1.074e-07 3.147e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.26984 (-1.46405 1.76593)
R1^2/D10^2 : 9.12414 (-6.79622 51.0048)
kT2 [keV] : 12.6182 (-4.44648 9.95341)
R2^2/D10^2 : 8.18017E-02 (-0.0750726 0.522477)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.03 using 59 PHA bins.
# Reduced chi-squared = 0.9641 for 55 degrees of freedom
# Null hypothesis probability = 5.503368e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.153e-08 2.221e-08
25- 50 4.167e-08 2.159e-08
50-150 2.717e-08 1.828e-08
15-150 1.104e-07 5.486e-08
Peak spectrum fit
Power-law model
Time interval is from 0.760 sec. to 1.760 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.41247 ( -0.430476 0.522101 )
Norm@50keV : 6.01523E-03 ( -0.00216122 0.00210676 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.47 using 59 PHA bins.
# Reduced chi-squared = 0.7802 for 57 degrees of freedom
# Null hypothesis probability = 8.866352e-01
Photon flux (15-150 keV) in 1 sec: 1.12128 ( -0.259307 0.25931 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.88586e-08 ( -1.61977e-08 1.70935e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.760 sec. to 1.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.661544 ( -3.35024 1.90179 )
Epeak [keV] : 28.0742 ( )
Norm@50keV : 7.38696E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.77 using 59 PHA bins.
# Reduced chi-squared = 0.7637 for 56 degrees of freedom
# Null hypothesis probability = 9.033151e-01
Photon flux (15-150 keV) in 1 sec: 1.12305 ( -0.261949 0.25711 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.760 sec. to 1.760 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 8.21065 (-1.86087 2.23698)
R^2/D10^2 : 1.13434 (-0.707931 2.08547)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.21 using 59 PHA bins.
# Reduced chi-squared = 0.7756 for 57 degrees of freedom
# Null hypothesis probability = 8.921107e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.409e-08 7.015e-09
25- 50 2.578e-08 1.291e-08
50-150 7.369e-09 5.039e-09
15-150 4.724e-08 2.406e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.8061 (-14.587 29.9155)
Norm : 7.94130 (-2.84905 4.9888)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.98 using 59 PHA bins.
# Reduced chi-squared = 0.7540 for 57 degrees of freedom
# Null hypothesis probability = 9.155912e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.751e-08 5.843e-09
25- 50 2.191e-08 8.604e-09
50-150 1.495e-08 1.072e-08
15-150 5.437e-08 2.248e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.01161 (-3.01488 -3.01488)
R1^2/D10^2 : 39.4102 (-39.2497 -39.2497)
kT2 [keV] : 9.84858 (-2.65563 17.3337)
R2^2/D10^2 : 0.468827 (-0.468063 1.46746)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.25 using 59 PHA bins.
# Reduced chi-squared = 0.7683 for 55 degrees of freedom
# Null hypothesis probability = 8.960493e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.676e-08 8.815e-09
25- 50 2.353e-08 1.361e-08
50-150 1.119e-08 7.370e-09
15-150 5.147e-08 2.840e-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: 2.57525 ( -0.373385 0.437845 )
Norm@50keV : 3.90192E-03 ( -0.00123524 0.0012414 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.98 using 59 PHA bins.
# Reduced chi-squared = 0.9822 for 57 degrees of freedom
# Null hypothesis probability = 5.132147e-01
Photon flux (15-150 keV) in 2.956 sec: 0.803262 ( -0.149206 0.14924 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17829e-07 ( -2.66651e-08 2.81968e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47522 ( -2.19994 0.528148 )
Epeak [keV] : 16.4807 ( )
Norm@50keV : 2.01427E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.48 using 59 PHA bins.
# Reduced chi-squared = 0.9729 for 56 degrees of freedom
# Null hypothesis probability = 5.325265e-01
Photon flux (15-150 keV) in 2.956 sec: 0.787697 ( -0.146876 0.149233 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08218e-07 ( -2.53852e-08 3.00173e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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) = 3.93e-08
S(50-100 keV) = 2.64e-08
T90 vs. Hardness ratio plot
T90 = 2.69200003147125 sec.
Hardness ratio (energy fluence ratio) = 0.671756
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.777567
Count Ratio (50-100 keV) / (15-25 keV) = 0.293574
Mask shadow pattern
IMX = 3.580880363536172E-01, IMY = 3.995953747267251E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
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:
-239.272000 -0.012000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9877 -15.6466 0.6 20.6 -65.4 9.6990 19.0 0.6 Sco X-1
256.1461 -37.9762 7.8 12.0 -159.1 -0.6671 -1.5 10.9 4U 1700-377
256.4651 -36.5797 5.4 10.7 -156.3 0.9611 2.2 9.5 GX 349+2
262.8649 -24.5790 0.0 2.9 -12.6 1.1623 2.7 12.7 GX 1+4
264.9617 -44.3410 6.7 16.9 169.0 -0.7667 -1.7 11.4 4U 1735-44
268.4136 -1.4099 6.5 26.5 5.1 0.9274 1.8 3.7 SW J1753.5-0127
270.2901 -25.0490 4.1 6.8 64.0 1.2986 2.9 1.8 GX 5-1
270.4398 -25.6802 5.3 6.7 69.4 1.0413 2.3 8.3 GRS 1758-258
273.8832 -14.0215 4.6 16.7 32.0 1.1149 2.5 7.2 GX 17+2
275.7514 -30.3589 4.7 11.4 101.0 1.1634 2.5 9.0 H1820-303
284.8614 -24.7857 0.0 19.6 80.3 0.4928 0.9 12.5 HT1900.1-2455
288.9246 10.8979 6.5 45.8 29.8 1.7859 1.8 8.0 GRS 1915+105
263.0428 -33.6890 5.3 6.2 174.5 0.9312 2.1 9.1 GX 354-0
293.9699 -72.6022 2.9 48.1 161.5 9.4463 3.9 ------ UNKNOWN
262.3280 -50.4639 1.7 23.0 174.7 3.1923 6.6 ------ UNKNOWN
228.4029 -64.2127 2.7 42.9 -165.3 3.6901 4.2 ------ UNKNOWN
254.9204 15.5775 2.3 43.8 -18.2 3.4729 4.9 ------ UNKNOWN
207.0649 -63.2812 2.0 50.6 -157.8 6.5939 5.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.012000 2.944000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9355 -15.4860 4.8 20.8 -65.1 0.0693 2.4 9.6 Sco X-1
256.0824 -37.9099 3.4 12.0 -158.7 0.0866 3.4 6.0 4U 1700-377
256.5942 -36.5519 6.8 10.7 -156.7 -0.0448 -1.7 10.9 GX 349+2
262.8641 -24.5846 14.2 2.9 -12.6 -0.0210 -0.8 12.5 GX 1+4
264.9348 -44.5199 8.0 17.1 169.1 0.0379 1.4 9.2 4U 1735-44
268.3803 -1.6045 8.1 26.3 5.1 0.0400 1.4 9.1 SW J1753.5-0127
270.1232 -25.0087 8.6 6.7 63.2 0.0339 1.3 9.7 GX 5-1
270.1882 -25.8859 4.9 6.4 70.6 -0.0586 -2.3 10.6 GRS 1758-258
274.0132 -14.0114 6.3 16.8 32.3 -0.0478 -1.8 1.6 GX 17+2
275.8642 -30.4419 5.5 11.5 101.3 -0.0558 -2.1 5.5 H1820-303
285.2070 -24.9988 36.2 19.9 81.2 0.0109 0.3 10.4 HT1900.1-2455
288.9003 10.9283 6.0 45.8 29.8 -0.1212 -1.9 6.1 GRS 1915+105
263.1373 -33.8345 5.5 6.4 173.8 0.0531 2.1 7.4 GX 354-0
201.1831 -74.2974 2.4 56.2 -170.0 0.6426 4.9 ------ UNKNOWN
244.8733 -5.2938 1.6 28.2 -48.1 0.2243 7.1 ------ UNKNOWN
200.5009 -48.2925 2.3 52.0 -138.1 0.7194 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
96.028610 144.628600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0050 -15.6452 0.7 10.3 145.3 1.7835 15.5 1.5 Sco X-1
254.3366 35.4099 5.7 41.7 -22.2 0.3619 2.0 7.2 Her X-1
255.9960 -37.7762 6.1 34.0 130.3 -0.6076 -1.9 4.1 4U 1700-377
256.6067 -36.3367 4.9 32.9 128.5 0.6825 2.3 9.8 GX 349+2
262.8533 -24.7527 19.9 26.0 106.4 0.1289 0.6 8.5 GX 1+4
268.2263 -1.4093 7.9 23.7 47.5 0.2397 1.5 8.9 SW J1753.5-0127
270.1717 -25.1728 6.4 31.4 98.1 0.4843 1.8 8.3 GX 5-1
270.3859 -25.9198 0.0 32.0 99.1 -0.1316 -0.5 11.5 GRS 1758-258
273.8233 -14.0768 19.9 29.8 75.4 0.1450 0.6 10.9 GX 17+2
275.8401 -30.4659 6.0 38.5 100.7 -0.9866 -1.9 7.4 H1820-303
288.7842 10.9507 113.5 46.6 35.7 -0.0403 -0.1 0.9 GRS 1915+105
263.1761 -33.7617 8.7 33.2 117.6 -0.3955 -1.3 10.3 GX 354-0
Plot creation:
Tue Jul 16 16:32:47 EDT 2019