Transient Analysis Summary

Summary of the Input Information

T0: 591543364.968000054 [MET] (2019-09-30T13:35:41.246 UTC)
Search time window: T0 +/- 100.0 s
Input source: RA=0.0, DEC=0.0 (source location is randomly seleected, since the true location is unknown.)
Input image: /local/data/bat2/batusers/batgroup/BAT_GW/results/S190930s/bayestar.fits.gz

FOV Check

The input source is out of the BAT FOV
The input image does not overlaps with the BAT FOV
The integrated LIGO localization probability that are in BAT FOV (with pcode > 10%): 0.003995932703484544
The integrated probability of Phil's convolved map that are in BAT FOV (with pcode > 10%): 0.004457762170013353
The integrated LIGO localization probability that are outside of the BAT FOV (with pcode > 10%) but above the Earth's limb: 0.9960031560541163

RED: BAT FOV (the brighter/whiter color refers to higher partial coding fraction).

YELLOW: Earth

BLUE: LIGO probability map

GREEN STAR: Input source (location is randomly seleected unless the true source location is available.)

Raw Light Curves

Quad-rate light curves (with 1.6 s time bin)

64-ms light curves

Detection > 5-sigma found:
## Time  Net_count SNR
-95.9760000705719 488.79424 18.64383697507684
-95.91200006008148 760.79424 29.018598464125688

1-s light curves

Detection > 5-sigma found:
## Time  Net_count SNR
-95.96800005435944 4244.675 12.358334425746751

Event data image search

Event data found. The analysis results are listing below.

 
## list of detected sources for 00926515005
 
########################################
 
########################################
## tstart_since_T0: 0.0
## tstop_since_T0: 0.1

                 TIME                           NAME     RA_OBJ    DEC_OBJ        SNR
                    s                                       deg        deg           
  1  591543364.968000 UNKNOWN                           57.6533   -51.0796      3.991
## tstart_since_T0: -2.0
## tstop_since_T0: 8.0

                 TIME                           NAME     RA_OBJ    DEC_OBJ        SNR
                    s                                       deg        deg           
  1  591543362.968000 UNKNOWN                          322.7268   -34.4455      6.283
  2  591543362.968000 UNKNOWN                           82.8522   -45.8833      5.307
  3  591543362.968000 UNKNOWN                          284.8055   -53.0180      5.301
########################################
 
########################################
## tstart_since_T0: -100.968
## tstop_since_T0: 99.102

                 TIME                           NAME     RA_OBJ    DEC_OBJ        SNR
                    s                                       deg        deg           
  1  591543264.000000 UNKNOWN                           61.6003   -17.0083      3.735
  2  591543264.000000 UNKNOWN                          311.1291   -42.7189      4.231
  3  591543264.000000 UNKNOWN                          289.6601   -36.1704      2.877
########################################

Investigation of the detector glitch around T-95.85 s

The short spike at ~T-95.9 s in 15-25 keV is due to detector glitch.

Reasons:
1. It is extremely short (~ 40 ms; see the zoomed-in light curve below).
2. The counts are from a few dozen of specific detectors (see the TIME vs DetID and the DPI plot below).

Here is the zoomed-in light curve of the short spike from T-95.95 s to T-95.85 s in 15-25 keV:


Here is the TIME vs DetID plot from T-95.95 s to T-95.85 s:

Last update: Mon Sep 30 14:10:09 EDT 2019