Pith Number

pith:MWF4VVF5

pith:2009:MWF4VVF5RNG4KJZJUYIGU4PAFR

not attested not anchored not stored refs pending

BD +44 493: A Ninth Magnitude Messenger from the Early Universe; Carbon Enhanced and Beryllium Poor

Hiroko Ito, Satoshi Honda, Timothy C. Beers, Wako Aoki

arxiv:0905.0950 v1 · 2009-05-07 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MWF4VVF5RNG4KJZJUYIGU4PAFR}

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	2026-05-18T04:29:43.155590Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

658bcad4bd8b4dc52729a6106a71e02c73b00342ac36fa5ffcf83093c3c78b33

Aliases

arxiv: 0905.0950 · arxiv_version: 0905.0950v1 · doi: 10.48550/arxiv.0905.0950 · pith_short_12: MWF4VVF5RNG4 · pith_short_16: MWF4VVF5RNG4KJZJ · pith_short_8: MWF4VVF5

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/MWF4VVF5RNG4KJZJUYIGU4PAFR \
  | 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: 658bcad4bd8b4dc52729a6106a71e02c73b00342ac36fa5ffcf83093c3c78b33

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2587ae007731c1eee0aa44de81df7a276950ad69c5ec823a97070d4a6f4789b4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-05-07T04:21:44Z",
    "title_canon_sha256": "41e10ef57734311061d1e08a0fe806daaec90a39bb12e1f15f4c4555aa5d9492"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.0950",
    "kind": "arxiv",
    "version": 1
  }
}