Pith Number

pith:R7AYP5YU

pith:2009:R7AYP5YUAOTSEXCKLRIKTXB6Y4

not attested not anchored not stored refs pending

Optical Identifications of 230 HIPASS Radio Sources

D. I. Makarov, I. D. Karachentsev, O. V. Melnyk, V. E. Karachentseva

arxiv:0902.0256 v2 · 2009-02-02 · 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{R7AYP5YUAOTSEXCKLRIKTXB6Y4}

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	2026-05-18T03:01:56.798220Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8fc187f71403a7225c4a5c50a9dc3ec727810d616df834c4e2be2a850cc07311

Aliases

arxiv: 0902.0256 · arxiv_version: 0902.0256v2 · doi: 10.48550/arxiv.0902.0256 · pith_short_12: R7AYP5YUAOTS · pith_short_16: R7AYP5YUAOTSEXCK · pith_short_8: R7AYP5YU

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/R7AYP5YUAOTSEXCKLRIKTXB6Y4 \
  | 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: 8fc187f71403a7225c4a5c50a9dc3ec727810d616df834c4e2be2a850cc07311

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "149fba7fe887343bdd8a83f50e45f9fac8b5d973a4c06a964021cd8edd9536bb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-02-02T11:48:34Z",
    "title_canon_sha256": "97c7b06aeb7dcefd099e2cec74a684e55f93378a2d0cdeec09c4599af4a0cc29"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.0256",
    "kind": "arxiv",
    "version": 2
  }
}