An optical spectrum would reveal redshift directly (if extragalactic) or stellar spectral type (if galactic). The current driving feature Γ = −12.0 ± 1.4 (12% relative error) is a photometric proxy — a spectrum is the direct measurement.
Currently 6 detections in 2 bands over 112.8 days. Color indices g−r, r−i, i−z, z−y are unmeasured — insufficient epochs in one or both component bands. Additional detections spanning those gaps would constrain spectral shape and reduce reliance on the single measured index.
A deep image in the primary band (g) at sub-arcsecond resolution would determine whether a faint host galaxy underlies the transient position — a distinction Rubin difference frames at their current depth cannot make.
Before trusting any "no match" result, the crossmatch infrastructure was validated against three controls: (1) a bright Gaia star — returned a clean Gaia DR3 match with correct separation; (2) a known AGN from SIMBAD — matched with the correct object type; (3) a blank sky patch — all four catalogs returned empty cones, confirming the code does not fabricate matches on empty fields. Only after all three controls passed were any "no match" verdicts trusted.
Scores use a percentile_composite scorer (v1.0.0). Each feature column is ranked within its tier — sparse objects are compared only to other sparse-tier objects, so a 4-epoch candidate is not penalised against a 200-epoch one. The IsolationForest threshold is calibrated to the 99th percentile of the tier distribution.
This object sits in the sparse tier with 1 scoring column. Its anomaly score of 0.7672 means it landed in the bottom 11.2% of its tier on the driving feature.
Fink real/bogus classifier: mean 0.271, min 0.183. Minimum reliability is close to the 0.5 decision boundary — at least one detection may be borderline. Inspect image stamps before reporting.
Feature set v1 · gate v1 · model percentile_composite 1.0.0 · classified 2026-06-19 02:37 UTC.
Run ID: 0446da9b-077c-4b88-a253-7acc335d4e0d