Pith Number

pith:MCSGF6US

pith:2012:MCSGF6USPHKPOKHWZQHWHJHCWC

not attested not anchored not stored refs pending

An Oxygen Abundance Gradient into the Outer Disk of M81

Cristina Chiappini, David A. Thilker, Maria T. Patterson, Rene A.M. Walterbos, Robert C. Kennicutt

arxiv:1202.0308 v1 · 2012-02-01 · astro-ph.CO · 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{MCSGF6USPHKPOKHWZQHWHJHCWC}

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	2026-05-18T01:58:36.561210Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

60a462fa9279d4f728f6cc0f63a4e2b09e6268822d9b81ff5a5df9b2ff451db8

Aliases

arxiv: 1202.0308 · arxiv_version: 1202.0308v1 · doi: 10.48550/arxiv.1202.0308 · pith_short_12: MCSGF6USPHKP · pith_short_16: MCSGF6USPHKPOKHW · pith_short_8: MCSGF6US

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/MCSGF6USPHKPOKHWZQHWHJHCWC \
  | 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: 60a462fa9279d4f728f6cc0f63a4e2b09e6268822d9b81ff5a5df9b2ff451db8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "19b15cba22b639ddb1d582238ab95c3a85f1dc048f7eef5f299ac57e229f238d",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-02-01T21:59:09Z",
    "title_canon_sha256": "736ac29bc3341dcc364030a9feafc7ad2e649d00dfb57e78f9ad7995555da5ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.0308",
    "kind": "arxiv",
    "version": 1
  }
}