Pith Number

pith:VLAJU7EB

pith:2018:VLAJU7EB6MP5CGVUF7DKHR7UWF

not attested not anchored not stored refs pending

Evidence for the First Extragalactic Hydrogen Recombination Line Maser in NGC 253

Alejandro B\'aez-Rubio, Fernando Rico-Villas, Izaskun Jim\'enez-Serra, Jes\'us Mart\'in-Pintado

arxiv:1810.07213 v1 · 2018-10-16 · 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{VLAJU7EB6MP5CGVUF7DKHR7UWF}

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	2026-05-18T00:01:57.375704Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aac09a7c81f31fd11ab42fc6a3c7f4b14bf1998dcd1a78d708b5e221b2c24a0b

Aliases

arxiv: 1810.07213 · arxiv_version: 1810.07213v1 · doi: 10.48550/arxiv.1810.07213 · pith_short_12: VLAJU7EB6MP5 · pith_short_16: VLAJU7EB6MP5CGVU · pith_short_8: VLAJU7EB

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/VLAJU7EB6MP5CGVUF7DKHR7UWF \
  | 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: aac09a7c81f31fd11ab42fc6a3c7f4b14bf1998dcd1a78d708b5e221b2c24a0b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0bcb963d2d71ac0a57f86cd9ffbd17a709382613f9225c305f3cd2b20a4ac2f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-10-16T18:08:47Z",
    "title_canon_sha256": "fa5ade7e829c6c149e05177c5a9fbf9f1ee200996539edf9f96d74892aa98b2e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.07213",
    "kind": "arxiv",
    "version": 1
  }
}