Pith Number

pith:2PNQNREL

pith:2009:2PNQNRELFTOHY2HR4B2HBJVKGW

not attested not anchored not stored refs pending

The flat oxygen abundance gradient in the extended disk of M83

Emma Ryan-Weber, Fabio Bresolin (IfA, Quinton Goddard (IoA, Robert C. Kennicutt, UK), University of Cambridge, University of Hawaii, USA)

arxiv:0901.1127 v1 · 2009-01-08 · 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{2PNQNRELFTOHY2HR4B2HBJVKGW}

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	2026-05-18T04:29:24.039369Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3db06c48b2cdc7c68f1e07470a6aa35960656bf0062c15d1f237d08bcac05b2

Aliases

arxiv: 0901.1127 · arxiv_version: 0901.1127v1 · doi: 10.48550/arxiv.0901.1127 · pith_short_12: 2PNQNRELFTOH · pith_short_16: 2PNQNRELFTOHY2HR · pith_short_8: 2PNQNREL

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/2PNQNRELFTOHY2HR4B2HBJVKGW \
  | 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: d3db06c48b2cdc7c68f1e07470a6aa35960656bf0062c15d1f237d08bcac05b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d47e727d057f3c480c304598e9f73f311bcc1430c2c54b329a62d37f413510a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-01-08T20:36:48Z",
    "title_canon_sha256": "9a292fe171a2af6f6e1b5b5f3137ac86015aa1ac5f48e8b5cccfe652e1d7ed1a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.1127",
    "kind": "arxiv",
    "version": 1
  }
}