Pith Number

pith:O2IOFRQL

pith:2018:O2IOFRQLEMTNWV4BKFOURHEQY7

not attested not anchored not stored refs pending

Registration of H$_2$O and SiO masers in the Calabash Nebula, to confirm the Planetary Nebula paradigm

J. Kim, Maria Rioja, Richard Dodson, S.H. Cho, Valentin Bujarrabal, Y.K. Choi, Y. Youngjoo

arxiv:1804.05060 v1 · 2018-04-13 · astro-ph.SR · astro-ph.GA · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O2IOFRQLEMTNWV4BKFOURHEQY7}

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

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	2026-05-18T00:18:30.651247Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7690e2c60b2326db5781515d489c90c7e0015d337c5ded960dd7866351625689

Aliases

arxiv: 1804.05060 · arxiv_version: 1804.05060v1 · doi: 10.48550/arxiv.1804.05060 · pith_short_12: O2IOFRQLEMTN · pith_short_16: O2IOFRQLEMTNWV4B · pith_short_8: O2IOFRQL

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/O2IOFRQLEMTNWV4BKFOURHEQY7 \
  | 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: 7690e2c60b2326db5781515d489c90c7e0015d337c5ded960dd7866351625689

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e08d4fe4cfe73533cd86076c943738df9131c0ae3069ea32afe3dec3ef0b01c",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-04-13T08:36:58Z",
    "title_canon_sha256": "7b54abe5bfb0afece4dd1ae8b28d2b0aa73555ff0377ebe6e7661545683a06f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.05060",
    "kind": "arxiv",
    "version": 1
  }
}