Pith Number

pith:MOIVLTH6

pith:2018:MOIVLTH6OSZ2DFZ7KNUSK62BIN

not attested not anchored not stored refs pending

Discovery of a vast ionized gas cloud in the M51 system

Aaron E. Watkins, J. Christopher Mihos, Matthew Bershady, Paul Harding

arxiv:1804.01699 v1 · 2018-04-05 · 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{MOIVLTH6OSZ2DFZ7KNUSK62BIN}

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	2026-05-18T00:15:14.845781Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

639155ccfe74b3a1973f5369257b414368eb9a5d0ae20bc2b378614a04ca0ce7

Aliases

arxiv: 1804.01699 · arxiv_version: 1804.01699v1 · doi: 10.48550/arxiv.1804.01699 · pith_short_12: MOIVLTH6OSZ2 · pith_short_16: MOIVLTH6OSZ2DFZ7 · pith_short_8: MOIVLTH6

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/MOIVLTH6OSZ2DFZ7KNUSK62BIN \
  | 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: 639155ccfe74b3a1973f5369257b414368eb9a5d0ae20bc2b378614a04ca0ce7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "56be43ca6ece048e927c9fbeeda073bda4e50dbbb49b8d9b4301e827cb4779df",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-04-05T07:23:44Z",
    "title_canon_sha256": "ed1ad1815a9f88ee7f1592ee05e597347dd56bd336c03c9efdcc0be2f6496845"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.01699",
    "kind": "arxiv",
    "version": 1
  }
}