Pith Number

pith:Y2Z5REOO

pith:2012:Y2Z5REOOCH5ZXPTXTD4C6CM2ZX

not attested not anchored not stored refs pending

Water-Vapor Maser Disk at the Nucleus of the Seyfert 2 Galaxy IC 2560 and its Distance

Aya Yamauchi, Naoko Sato, Naomasa Nakai, Philip Diamond, Yuko Ishihara

arxiv:1207.6820 v1 · 2012-07-30 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y2Z5REOOCH5ZXPTXTD4C6CM2ZX}

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	2026-05-18T01:56:06.277890Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c6b3d891ce11fb9bbe7798f82f099acdf1712fc79f74ffeab94198cb77846f8c

Aliases

arxiv: 1207.6820 · arxiv_version: 1207.6820v1 · doi: 10.48550/arxiv.1207.6820 · pith_short_12: Y2Z5REOOCH5Z · pith_short_16: Y2Z5REOOCH5ZXPTX · pith_short_8: Y2Z5REOO

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/Y2Z5REOOCH5ZXPTXTD4C6CM2ZX \
  | 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: c6b3d891ce11fb9bbe7798f82f099acdf1712fc79f74ffeab94198cb77846f8c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9d4aee82dd205c90c6c470b079e6ebc82a65c3aaf5bf5b72a063b6a2281f20c6",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2012-07-30T01:57:51Z",
    "title_canon_sha256": "ae7ba57f34169ad555d65a977cedd14556e14fa1d55f6a0e7fd9e5bd75ca379f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.6820",
    "kind": "arxiv",
    "version": 1
  }
}