Pith Number

pith:KMEZGJS4

pith:2009:KMEZGJS4PUIFQLP7UH436RZTOG

not attested not anchored not stored refs pending

Oxygen Metallicity Determinations from Optical Emission Lines in Early-type Galaxies

Alex E. Athey, Joel N. Bregman

arxiv:0903.4197 v1 · 2009-03-24 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KMEZGJS4PUIFQLP7UH436RZTOG}

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	2026-05-18T04:29:15.645469Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

530993265c7d10582dffa1f9bf473371b22a494a16dd5ad1cb68148d70542218

Aliases

arxiv: 0903.4197 · arxiv_version: 0903.4197v1 · doi: 10.48550/arxiv.0903.4197 · pith_short_12: KMEZGJS4PUIF · pith_short_16: KMEZGJS4PUIFQLP7 · pith_short_8: KMEZGJS4

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/KMEZGJS4PUIFQLP7UH436RZTOG \
  | 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: 530993265c7d10582dffa1f9bf473371b22a494a16dd5ad1cb68148d70542218

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ff7e6af58ac538cc36187bf9f230a899ddbc6d10613798c430902393e4226c7",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/publicdomain/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-24T21:29:45Z",
    "title_canon_sha256": "c62b303a90fcfc3e825bd8af0ab5e96a22299dd3d85534e5e23189a73f3c0910"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4197",
    "kind": "arxiv",
    "version": 1
  }
}