Pith Number

pith:KY4EV542

pith:2013:KY4EV542E6X6ECXZ4QJQSDUOBR

not attested not anchored not stored refs pending

Discovery of the Fomalhaut C debris disc

B. C. Matthews, B. Sibthorpe, G. Duch\^ene, G. M. Kennedy, J.-F. Lestrade, J. S. Greaves, M. C. Wyatt, P. Kalas

arxiv:1312.5315 v1 · 2013-12-18 · astro-ph.EP · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KY4EV542E6X6ECXZ4QJQSDUOBR}

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	2026-05-18T02:39:16.624216Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

56384af79a27afe20af9e413090e8e0c7f97de0467d024f77e2b3bf24328cc79

Aliases

arxiv: 1312.5315 · arxiv_version: 1312.5315v1 · doi: 10.48550/arxiv.1312.5315 · pith_short_12: KY4EV542E6X6 · pith_short_16: KY4EV542E6X6ECXZ · pith_short_8: KY4EV542

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/KY4EV542E6X6ECXZ4QJQSDUOBR \
  | 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: 56384af79a27afe20af9e413090e8e0c7f97de0467d024f77e2b3bf24328cc79

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "af3a1927660366b3d6911a14d55986b22a411ca58cc99713c03afbc54c25a970",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2013-12-18T21:00:01Z",
    "title_canon_sha256": "877f2c929fdfa2544e313c804343931370c49fa951f1ca5555b3d00c819ce855"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.5315",
    "kind": "arxiv",
    "version": 1
  }
}