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GW trigger S240915b (‘S240915b’)

Please see the usage policy before using these data.

Raw GW map | Convolved with 2MPZ

Image of the XRT fields observed

Green spots mark XRT fields observed, red spots mark those planned but not yet observed. Click the image for a larger version.

GW map (HEALPix) | GW map (FITS) | ligo-skymap-from-samples_convolved map (HEALPix) | ligo-skymap-from-samples_convolved map (FITS)

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GW details
Trigger Date:2024-09-15 at 00:13:57.715 UT
Trigger type:Compact Binary Coalescence
Distance:872 ± 148 Mpc
ProbContainsNeutronStar:0
ProbEMBright:0
False alarm rate:3.168e-10 Hz = 1/100.1 yr
GraceDB:GraceDB
XRT details
First observation:T0 + 380.6 min
Fields planned:312
Fields observed:309 [Search]
TargetID range:7034209—7034623
LVK Prob observed0.72 (raw), 0.71 (conv)
LVK Prob to observe-3.34e-3 (raw), 2.50e-3 (conv)
XRT sources:8 (8 verified and public).
Candidate afterglows:0
Possible afterglows:0
Unlikely afterglows:4
Known X-ray sources:4
Externally-detected sources
There are 0 sources. Show.

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List of possible host galaxies.

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All X-ray sources

Include:

# Position Err1 Flag2 Class3
(Rank)
Exp
(s)
Cat
source?
Fdiff (σ)4 Near
Galaxy?
Near
2MASS
Near
SIMBAD
Search
/build
Notes
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Notes:

1 Error is 90% confidence, radius

2 G=Good, R=Reasonable, P=Poor (What?)

3 AG = Candidate afterglow, I=Interesting source, U=Uncatalogued X-ray source, K=Known X-ray source.

4 For uncatalogued sources this is how many sigma above the historical upper limit the source is, for known sources this is how many sigma above the catalogued flux the source is.