Pith Number

pith:7TMQYT2X

pith:2018:7TMQYT2XIF3MUYTNB7ESJPFA3Q

not attested not anchored not stored refs pending

M31 PAndromeda Cepheid sample observed in four HST bands

Arno Riffeser, Claus Goessl, Jan Snigula, Johannes Koppenhoefer, Mihael Kodric, Ralf Bender, Stella Seitz, Ulrich Hopp

arxiv:1807.08753 v1 · 2018-07-23 · 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{7TMQYT2XIF3MUYTNB7ESJPFA3Q}

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	2026-05-18T00:06:37.362961Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fcd90c4f574176ca626d0fc924bca0dc123eb4c4e53c82a0b10bbbe56c72df3d

Aliases

arxiv: 1807.08753 · arxiv_version: 1807.08753v1 · doi: 10.48550/arxiv.1807.08753 · pith_short_12: 7TMQYT2XIF3M · pith_short_16: 7TMQYT2XIF3MUYTN · pith_short_8: 7TMQYT2X

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/7TMQYT2XIF3MUYTNB7ESJPFA3Q \
  | 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: fcd90c4f574176ca626d0fc924bca0dc123eb4c4e53c82a0b10bbbe56c72df3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7616201e00a663de228dd63ef13009b1982d0d823ff76b6e0232ad2b231bdf98",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-07-23T18:00:00Z",
    "title_canon_sha256": "ad4a7f4336ef06ea02d939b17cc81ae183ab39f1af7ede1f7349acffc2cd756a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.08753",
    "kind": "arxiv",
    "version": 1
  }
}