Pith Number

pith:UNAZT6WD

pith:2009:UNAZT6WDX464GZAUOQIXNJVQ75

not attested not anchored not stored refs pending

RAT J1953+1859: a dwarf nova discovered through high amplitude QPOs in quiescence

((1) Armagh Observatory, (2) Tuorla Observatory, 3), (3) MSSL/Ucl, (4) Univ Warwick, (5) Univ Herts, (6) Radboud Univ Nijmegen, (7) SAAO, (8) Queens Univ Belfast), Gavin Ramsay (1), George Marshall (4), Gijs Nelemans (6), Harry Lehto (2), Ian Todd (8), Pasi Hakala (2), Peter Wheatley (4), Ralf Napiwotzki (5), Stephen Potter (7), Thomas Barclay (1

arxiv:0904.4211 v1 · 2009-04-27 · astro-ph.HE · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UNAZT6WDX464GZAUOQIXNJVQ75}

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	2026-05-18T02:13:57.002563Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a34199fac3bf3dc36414741176a6b0ff74def95a9dc554d7bce009e1bda08864

Aliases

arxiv: 0904.4211 · arxiv_version: 0904.4211v1 · doi: 10.48550/arxiv.0904.4211 · pith_short_12: UNAZT6WDX464 · pith_short_16: UNAZT6WDX464GZAU · pith_short_8: UNAZT6WD

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/UNAZT6WDX464GZAUOQIXNJVQ75 \
  | 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: a34199fac3bf3dc36414741176a6b0ff74def95a9dc554d7bce009e1bda08864

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d222ca668e616876d14a01063572fa2fca3dfdd8c3e5b5a3022c1bfb92c128a2",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-04-27T16:38:44Z",
    "title_canon_sha256": "77846743894641a276db5563cedf17f0aca1ff6da1b7ec543122cab1a7da314f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4211",
    "kind": "arxiv",
    "version": 1
  }
}