batgrbproduct analysis for trigger=1197506

batgrbproduct Analysis for Trigger=1197506

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
4) This page will be updated for up to 15 downlinks after the trigger.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Tue Nov 21 04:00:47 EST 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1197506/GCN5_download_cron
======================================================================

  Trigger: 01197506      Segment: 000

  BAT Trigger Time: 722132224   [s; MET]
      Trigger Stop: 722132576   [s; MET]
               UTC: 2023-11-20T00:16:31.599100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 299.834817251391   Dec: 35.1034683668243  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.05
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.05

  Flight Position:   [ source = BAT ]
    RA: 299.834817251391   Dec: 35.1034683668243  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 299.867514457249   Dec: 35.1020102444728  [deg; J2000]  
        { 19h 59m 28.2s , +35d 06' 07.2" }
         +/- 2.83164396564288 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.70729160515743 [arcmin] (formal 1-sigma fit error)
    SNR: 6.87620608845524
 
  Angular difference between Flight and Ground position is 1.607401 arcmin
 
  Partial Coding Fraction: 0.1777344    [ including projection effects ]

  Duration
     T90: 20.2120000123978 +/- 11.9703094862879
        Measured from: 405.560000061989
                   to: 425.772000074387     [s; relative to TRIGTIME]
     T50: 13.8279999494553 +/- 10.7718225244159
        Measured from: 403.552000164986
                   to: 417.380000114441     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 401.407999992371     
                   to: 402.407999992371     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 395.503999948502     
                   to: 429.544000029564     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.466903   0.592062   0.268269  -0.006289
           0.053932   0.055924   0.046787   0.039501 [error]
 Peak      0.031603   0.032472   0.012435   0.010360
           0.011329   0.011394   0.009817   0.008172 [error]

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

======================================================================
 
=== 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   Power-law 6.73e-07 9.41e-07 9.74e-07 1.85e-06 3.17e-06 4.44e-06   erg/cm2
              Error 1.42e-07 1.27e-07 1.98e-07 7.69e-07 4.67e-07 9.58e-07   erg/cm2
Peak flux Power-law 1.83e-01 1.42e-01 7.33e-02 5.47e-02 4.23e-01 4.53e-01   ph/cm2/s
              Error 3.94e-02 1.94e-02 1.43e-02 2.11e-02 5.94e-02 6.10e-02   ph/cm2/s
 
Fluence   Cutoff-PL 6.74e-07 9.42e-07 9.73e-07 1.83e-06 3.17e-06 4.24e-06   erg/cm2
              Error 1.48e-07 1.43e-07 2.01e-07 1.34e-06 2.45e-07 1.24e-06   erg/cm2
Peak flux Cutoff-PL 1.84e-01 1.42e-01 7.31e-02 5.40e-02 4.23e-01 4.53e-01   ph/cm2/s
              Error 4.16e-02 2.13e-02 1.47e-02 3.88e-02 4.45e-02 6.76e-02   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 2.11e-01 1.57e-01 7.42e-02 4.16e-02 4.65e-01 4.85e-01   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.000    0.000    -      -           0.00e+00 0.00e+00    0.000  0
CPL   0.000    0.000       0.0    0.0      0.00e+00 0.00e+00    0.000  0
 
The chi2 of BB fit is 70.43 which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.000    0.000    -      -           0.00e+00 0.00e+00    0.000  0
CPL   0.000    0.000       0.0    0.0      0.00e+00 0.00e+00    0.000  0
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the 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 PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom

 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   34.040  395.504  429.544
T90    20.212  405.560  425.772
T50    13.828  403.552  417.380
Peak    1.000  401.408  402.408

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  299.8675 +35.1020 0.0281   55.0 -175.6       5.2755     6.9  TRIG_01197506       
------------------------------------------
 
Foreground time interval of the image:
  0.000  63.158 (delta_t =  63.158 [sec])
173.000 179.090 (delta_t =   6.090 [sec])
181.000 204.130 (delta_t =  23.130 [sec])
206.000 211.230 (delta_t =   5.230 [sec])
213.000 215.457 (delta_t =   2.457 [sec])
218.000 224.192 (delta_t =   6.192 [sec])
227.000 233.370 (delta_t =   6.370 [sec])
235.000 238.790 (delta_t =   3.790 [sec])
240.000 243.100 (delta_t =   3.100 [sec])
Background time interval of the image:

Lightcurves

Notes:

1) All plots contain as much data as has been downloaded to date.
2) The mask-weighted light curves are using the flight position.
3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
4) 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.
5) 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.
6) 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)

Spectra

Notes:

1) The fitting includes the systematic errors.
2) For long bursts, a spectral fit of 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.
4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.

Time averaged spectrum fit using the pre-slew DRM

Power-law model

Multiple GTIs in the spectrum
tstart tstop
395.504000 397.406000
399.000000 429.544000
Usage: bat_spec_fit_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
       This script tries to add the systematic column to the PHA
       file before doing the fitting                            
script folder: /local/data/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel

Cutoff power-law model

Multiple GTIs in the spectrum
tstart tstop
395.504000 397.406000
399.000000 429.544000
Usage: bat_spec_fit_cutoff_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
       This script tries to add the systematic column to the PHA
       file before doing the fitting                            
script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel

Band function

Multiple GTIs in the spectrum
tstart tstop
395.504000 397.406000
399.000000 429.544000
Usage: bat_spec_fit_band_sys.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
       This script tries to add the systematic column to the PHA
       file before doing the fitting                            
script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel

Single BB

Usage: bat_spec_fit_bb_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Thermal bremsstrahlung (OTTB)

Usage: bat_spec_fit_brems_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Double BB

Usage: bat_spec_fit_2bb_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Peak spectrum fit

Power-law model

Time interval is from  401.408 sec. to  402.408 sec.
Usage: bat_spec_fit_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
       This script tries to add the systematic column to the PHA
       file before doing the fitting                            
script folder: /local/data/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel

Cutoff power-law model

Time interval is from  401.408 sec. to  402.408 sec.
Usage: bat_spec_fit_cutoff_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
       This script tries to add the systematic column to the PHA
       file before doing the fitting                            
script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel

Band function

Time interval is from  401.408 sec. to  402.408 sec.
Usage: bat_spec_fit_band_sys.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
       This script tries to add the systematic column to the PHA
       file before doing the fitting                            
script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel

Single BB

Usage: bat_spec_fit_bb_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Thermal bremsstrahlung (OTTB)

Usage: bat_spec_fit_brems_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Double BB

Usage: bat_spec_fit_2bb_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

Cutoff power-law model

Band function

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 9.41e-07
S(50-100 keV) = 9.74e-07

T90 vs. Hardness ratio plot

T90                                   = 20.2120000123978 sec.
Hardness ratio (energy fluence ratio) = 1.03507

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.26806
Count Ratio (50-100 keV) / (15-25 keV) = 0.574571

Mask shadow pattern

IMX = -1.422576717330128E+00, IMY = 1.103504021486549E-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:
-60.000000 -36.110000
-35.000000 112.340000
115.000000 179.570000
181.000000 204.130000
205.000000 243.099800
348.000000 365.300590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2860  35.4323   13.1  25.1 -139.3   0.6097   0.9   10.0	Her X-1                       
299.5070  35.1408    5.6  54.7 -175.4  -4.1098  -2.1    5.5	Cyg X-1                       
308.0978  41.0205    5.5  56.4  174.0  -4.4987  -2.1    4.1	Cyg X-3                       
228.8656  44.0501    2.6   5.3 -100.8   2.3913   4.5 ------	UNKNOWN                       
299.8828  35.1088    1.7  55.0 -175.6  13.8842   6.9 ------	UNKNOWN                       
215.8070   5.0288    2.6  44.3  -56.7  11.8061   4.4 ------	UNKNOWN                       
239.8034   9.8172    2.7  40.7  -92.6  11.8454   4.2 ------	UNKNOWN

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
0.000000 63.158000
173.000000 179.090000
181.000000 204.130000
206.000000 211.230000
213.000000 215.457300
218.000000 224.191700
227.000300 233.370000
235.000000 238.790000
240.000000 243.099800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5983  35.4899   10.7  25.3 -139.8   0.2991   1.1   11.2	Her X-1                       
299.5092  35.1397    9.5  54.7 -175.4  -0.9166  -1.2    5.4	Cyg X-1                       
308.2145  40.9187    9.7  56.5  174.0  -1.1803  -1.2    5.1	Cyg X-3                       
299.8669  35.1021    1.7  55.0 -175.6   5.2571   6.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
473.100610 477.880000
479.000000 480.940000
482.000000 548.070000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3398  35.4562    6.4  36.8  -45.0   0.6067   1.8    8.9	Her X-1                       
288.6750  10.8686   10.5  26.3 -123.7   0.2510   1.1    8.6	GRS 1915+105                  
299.7526  35.1064    2.8   0.1  -61.9   0.7499   4.1    9.8	Cyg X-1                       
308.3358  40.8944    4.3   8.8   77.5   0.4889   2.7   10.8	Cyg X-3                       
325.9448  38.4167    0.0  21.1  104.2   0.0515   0.2   12.1	Cyg X-2                       
349.0472  24.5620    2.2  43.5  121.0   4.9449   5.3 ------	UNKNOWN                       
308.9448 -24.2748    2.3  60.0 -158.7   8.9511   5.1 ------	UNKNOWN                       
249.0322  25.7459    2.5  44.3  -56.8   4.0591   4.7 ------	UNKNOWN

Plot creation:
Tue Nov 21 04:02:46 EST 2023