Pith Number

pith:U56HHEVM

pith:2009:U56HHEVMUHYCNJMDVONWNJPYTJ

not attested not anchored not stored refs pending

Star Formation Histories within the Antennae Galaxies (Arp 244)

Hong-Xin Zhang, Xu Kong, Yu Gao

arxiv:0909.5186 v1 · 2009-09-29 · 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{U56HHEVMUHYCNJMDVONWNJPYTJ}

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	2026-05-18T02:11:36.740785Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a77c7392aca1f026a583ab9b66a5f89a4fefe9f83b28bbbc48ad60aafdac1d82

Aliases

arxiv: 0909.5186 · arxiv_version: 0909.5186v1 · doi: 10.48550/arxiv.0909.5186 · pith_short_12: U56HHEVMUHYC · pith_short_16: U56HHEVMUHYCNJMD · pith_short_8: U56HHEVM

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/U56HHEVMUHYCNJMDVONWNJPYTJ \
  | 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: a77c7392aca1f026a583ab9b66a5f89a4fefe9f83b28bbbc48ad60aafdac1d82

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5c4327d17b3c0b2cc0b66708542338cc7e31fba97a75de42b89d88f16f2e8d47",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-29T05:02:10Z",
    "title_canon_sha256": "37f3496140f4b1fe965a919406451c10b4c790edf410d0faaf2281b07967dd91"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.5186",
    "kind": "arxiv",
    "version": 1
  }
}