GRB190627A

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Tue Jul 16 16:23:32 EDT 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger911609
======================================================================

  Trigger: 00911609      Segment: 000

  BAT Trigger Time: 583327134.272   [s; MET]
      Trigger Stop: 583327136.32   [s; MET]
               UTC: 2019-06-27T11:18:31.127400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 244.830211321885   Dec: -5.29214903648591  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.64
     Image Trigger?:     NO
     Rate S/N Ratio:     12.2882057274445  [ if not an image trigger ]
     Image S/N Ratio:    7.64

  Analysis Position:   [ source = BAT ]
    RA: 244.830211321885   Dec: -5.29214903648591  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 244.873190194457   Dec: -5.29381624561048  [deg; J2000]  
        { 16h 19m 29.6s , -05d 17' 37.7" }
         +/- 2.77030549169938 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.25698186184182 [arcmin] (formal 1-sigma fit error)
    SNR: 7.0947321553584
 
  Angular difference between the analysis and refined position is 2.569684 arcmin
 
  Partial Coding Fraction: 0.734375    [ including projection effects ]

  Duration
     T90: 2.69200003147125 +/- 0.88095405095938
        Measured from: 0.120000004768372
                   to: 2.81200003623962     [s; relative to TRIGTIME]
     T50: 1.19999992847443 +/- 1.13680256797063
        Measured from: 0.532000064849854
                   to: 1.73199999332428     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.759999990463257     
                   to: 1.75999999046326     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0119999647140503     
                   to: 2.94400000572205     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.125539   0.097615   0.036855  -0.027564
           0.018691   0.016994   0.013926   0.011410 [error]
 Peak      0.052175   0.049128   0.016967  -0.012870
           0.011184   0.009988   0.008526   0.006494 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    2.956   -0.012    2.944
T90     2.692    0.120    2.812
T50     1.200    0.532    1.732
Peak    1.000    0.760    1.760
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_index}
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -2.575    -0.438      0.373       -           -               -         3.90e-03     -1.24e-03          1.24e-03      55.980   57
CPL     -1.476    -0.528      2.200       16.471      N/A           N/A         2.01e-02        N/A               N/A         54.480   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -2.412     -0.522     0.430       -           -               -         6.02e-03     -2.16e-03          2.11e-03      44.470   57
CPL     -0.662     -1.902     3.350       28.074      N/A           N/A         7.39e-02        N/A               N/A         42.770   56
 
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1     Band2     Band3     Band4     Band5     Total
                       15-25     25-50    50-100    100-350    15-150    15-350    keV
Fluence         PL   4.09e-08  3.94e-08  2.64e-08  2.77e-08  1.18e-07  1.34e-07   erg/cm2
      90%_error_low -8.99e-09 -8.73e-09 -1.05e-08 -1.63e-08 -2.67e-08 -3.58e-08   erg/cm2
      90%_error_hi   9.11e-09  8.45e-09  1.20e-08  2.80e-08  2.82e-08  4.40e-08   erg/cm2
Peak flux       PL   6.00e-01  3.54e-01  1.33e-01  6.64e-02  1.12e+00  1.15e+00   ph/cm2/s
      90%_error_low -1.71e-01 -8.86e-02 -5.83e-02 -4.18e-02 -2.59e-01 -2.68e-01   ph/cm2/s
      90%_error_hi   1.79e-01  8.67e-02  6.41e-02  7.07e-02  2.59e-01  2.68e-01   ph/cm2/s
 
Fluence        CPL    N/A      N/A      N/A      N/A      N/A      N/A      erg/cm2
      90%_error_low -8.99e-09 -8.73e-09 -1.05e-08 -1.63e-08 -2.67e-08 -3.58e-08   erg/cm2
      90%_error_hi   9.11e-09  8.45e-09  1.20e-08  2.80e-08  2.82e-08  4.40e-08   erg/cm2
Peak flux      CPL   5.98e-01  3.75e-01  1.28e-01  6.93e-02  1.12e+00  1.14e+00   ph/cm2/s
      90%_error_low -1.72e-01 -1.84e-01 -6.80e-02     N/A   -2.62e-01 -2.57e-01   ph/cm2/s
      90%_error_hi   1.68e-01  8.72e-02  1.01e-01     N/A    2.57e-01  2.84e-01   ph/cm2/s
 
======================================================================

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])

Light Curves

Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

Full-time range; 1 s binning

Bokeh Plot

Other quick-look light curves:

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve

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     ( -0.437845   0.373385 )
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     ( -0.528009   2.20014 )
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

1-s 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     ( -0.522101   0.430476 )
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     ( -1.90179   3.35024 )
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

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 2.692 sec.
Hardness ratio (energy fluence ratio) = 0.671227766386

S(15-50 keV) vs. S(50-150 keV) plot

S(15-50 keV)  = 8.023311e-08
S(50-150 keV) = 3.762932e-08

The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.

 IMX = 3.580880363536172E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.272000 -0.012000

# RAcent #  [deg] 244.9877 -15.6466 256.1461 -37.9762 256.4651 -36.5797 262.8649 -24.5790 264.9617 -44.3410 268.4136  -1.4099 270.2901 -25.0490 270.4398 -25.6802 273.8832 -14.0215 275.7514 -30.3589 284.8614 -24.7857 288.9246  10.8979 263.0428 -33.6890 293.9699 -72.6022 262.3280 -50.4639 228.4029 -64.2127 254.9204  15.5775 207.0649 -63.2812

Pre-slew

 Time interval of the image: -0.012000 2.944000

# RAcent #  [deg] 244.9355 -15.4860 256.0824 -37.9099 256.5942 -36.5519 262.8641 -24.5846 264.9348 -44.5199 268.3803  -1.6045 270.1232 -25.0087 270.1882 -25.8859 274.0132 -14.0114 275.8642 -30.4419 285.2070 -24.9988 288.9003  10.9283 263.1373 -33.8345 201.1831 -74.2974 244.8733  -5.2938 200.5009 -48.2925

Post-slew

 Time interval of the image: 96.028610 144.628600

# RAcent #  [deg] 245.0050 -15.6452 254.3366  35.4099 255.9960 -37.7762 256.6067 -36.3367 262.8533 -24.7527 268.2263  -1.4093 270.1717 -25.1728 270.3859 -25.9198 273.8233 -14.0768 275.8401 -30.4659 288.7842 263.1761 -33.7617

Mask shadow pattern

IMY = 3.995953747267251E-01 source in the pre-burst/pre-slew/post-slew images image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.6 20.6 -65.4 9.6990 19.0 0.6 Sco X-1 7.8 12.0 -159.1 -0.6671 -1.5 10.9 4U 1700-377 5.4 10.7 -156.3 0.9611 2.2 9.5 GX 349+2 0.0 2.9 -12.6 1.1623 2.7 12.7 GX 1+4 6.7 16.9 169.0 -0.7667 -1.7 11.4 4U 1735-44 6.5 26.5 5.1 0.9274 1.8 3.7 SW J1753.5-0127 4.1 6.8 64.0 1.2986 2.9 1.8 GX 5-1 5.3 6.7 69.4 1.0413 2.3 8.3 GRS 1758-258 4.6 16.7 32.0 1.1149 2.5 7.2 GX 17+2 4.7 11.4 101.0 1.1634 2.5 9.0 H1820-303 0.0 19.6 80.3 0.4928 0.9 12.5 HT1900.1-2455 6.5 45.8 29.8 1.7859 1.8 8.0 GRS 1915+105 5.3 6.2 174.5 0.9312 2.1 9.1 GX 354-0 2.9 48.1 161.5 9.4463 3.9 ------ UNKNOWN 1.7 23.0 174.7 3.1923 6.6 ------ UNKNOWN 2.7 42.9 -165.3 3.6901 4.2 ------ UNKNOWN 2.3 43.8 -18.2 3.4729 4.9 ------ UNKNOWN 2.0 50.6 -157.8 6.5939 5.8 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 4.8 20.8 -65.1 0.0693 2.4 9.6 Sco X-1 3.4 12.0 -158.7 0.0866 3.4 6.0 4U 1700-377 6.8 10.7 -156.7 -0.0448 -1.7 10.9 GX 349+2 14.2 2.9 -12.6 -0.0210 -0.8 12.5 GX 1+4 8.0 17.1 169.1 0.0379 1.4 9.2 4U 1735-44 8.1 26.3 5.1 0.0400 1.4 9.1 SW J1753.5-0127 8.6 6.7 63.2 0.0339 1.3 9.7 GX 5-1 4.9 6.4 70.6 -0.0586 -2.3 10.6 GRS 1758-258 6.3 16.8 32.3 -0.0478 -1.8 1.6 GX 17+2 5.5 11.5 101.3 -0.0558 -2.1 5.5 H1820-303 36.2 19.9 81.2 0.0109 0.3 10.4 HT1900.1-2455 6.0 45.8 29.8 -0.1212 -1.9 6.1 GRS 1915+105 5.5 6.4 173.8 0.0531 2.1 7.4 GX 354-0 2.4 56.2 -170.0 0.6426 4.9 ------ UNKNOWN 1.6 28.2 -48.1 0.2243 7.1 ------ UNKNOWN 2.3 52.0 -138.1 0.7194 5.1 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.7 10.3 145.3 1.7835 15.5 1.5 Sco X-1 5.7 41.7 -22.2 0.3619 2.0 7.2 Her X-1 6.1 34.0 130.3 -0.6076 -1.9 4.1 4U 1700-377 4.9 32.9 128.5 0.6825 2.3 9.8 GX 349+2 19.9 26.0 106.4 0.1289 0.6 8.5 GX 1+4 7.9 23.7 47.5 0.2397 1.5 8.9 SW J1753.5-0127 6.4 31.4 98.1 0.4843 1.8 8.3 GX 5-1 0.0 32.0 99.1 -0.1316 -0.5 11.5 GRS 1758-258 19.9 29.8 75.4 0.1450 0.6 10.9 GX 17+2 6.0 38.5 100.7 -0.9866 -1.9 7.4 H1820-303 10.9507 113.5 46.6 35.7 -0.0403 -0.1 0.9 GRS 1915+105 8.7 33.2 117.6 -0.3955 -1.3 10.3 GX 354-0

Analysis Summary

Notes:

Image

Pre-slew 15.0-350.0 keV image (Event data)

Light Curves

Full-time range; 1 s binning

Other quick-look light curves:

64 ms binning (zoomed) 16 ms binning (zoomed) 8 ms binning (zoomed) 2 ms binning (zoomed) SN=5 or 10 s binning (full-time range) Raw light curve

Spectra

Notes:

Time averaged spectrum fit using the average DRM

Power-law model

Cutoff power-law model

1-s peak spectrum fit

Power-law model

Cutoff power-law model

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

S(15-50 keV) vs. S(50-150 keV) plot

IMX = 3.580880363536172E-01,

Spacecraft aspect plot

Bright

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve