Pith Number

pith:B25RCSST

pith:2002:B25RCSSTVG6GPOGUCQENSCUGJP

not attested not anchored not stored refs pending

Possible arcminute-separation gravitational lensed QSOs in the 2dF QSO survey

(2) Astrophysics Research Institute, (3) Anglo-Australian Observatory, (4) Dept. of Physics, A. M. Lopes (1), B. J. Boyle (3), Durham University.), Liverpool John Moores University, L. Miller (1), Oxford University, P. Outram (4) ((1) Dept. of Physics, R. J. Smith (2), S. M. Croom (3), T. Shanks (4)

arxiv:astro-ph/0210644 v2 · 2002-10-29 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B25RCSSTVG6GPOGUCQENSCUGJP}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T04:27:05.001304Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ebb114a53a9bc67b8d41408d90a864bf36ba91a90693cc49cd1affb8cac1643

Aliases

arxiv: astro-ph/0210644 · arxiv_version: astro-ph/0210644v2 · doi: 10.48550/arxiv.astro-ph/0210644 · pith_short_12: B25RCSSTVG6G · pith_short_16: B25RCSSTVG6GPOGU · pith_short_8: B25RCSST

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/B25RCSSTVG6GPOGUCQENSCUGJP \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 0ebb114a53a9bc67b8d41408d90a864bf36ba91a90693cc49cd1affb8cac1643

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9dc772e5b68f030caf3f22078cbb537eb54a0568af1e30088daa239b521625fc",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-10-29T23:23:27Z",
    "title_canon_sha256": "4bba3e8e89db5da3c3ec3d2f4528030fa46d0859525a3b18960428ace0fa3b97"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0210644",
    "kind": "arxiv",
    "version": 2
  }
}