Supports· moderateTRN-E013
Analogous candidates on Hamburg Observatory plates
- what the source states
- A search of rapidly repeated (≈30 minutes apart) same-night plate pairs from the Hamburg Observatory 1.2-m Großer Schmidtspiegel, digitized by the APPLAUSE archive, finds evidence of transients similar to those reported by the VASCO project on POSS plates, including systematically narrow FWHM relative to stellar point-spread functions; the initial sample comprises 41 plates from 1954–1957, and the author labels the findings preliminary.
- what we infer
- If it holds up, this is the first appearance of the phenomenon outside the Palomar plate-copy genealogy — the copy-defect mechanism (TRN-C007) cannot reach it. What it does not yet have is a measured candidate rate against matched controls, so "similar phenomenon" and "similar defect susceptibility" remain indistinguishable.
- limitations
- Preprint, explicitly preliminary; no false-positive calibration or injection/recovery testing published.
- Different methodology (plate-pair differencing, no external catalogs) — a strength for independence, a weakness for comparability.