Pith Number

pith:YBTBP2RK

pith:2009:YBTBP2RK5VYYMJRUGQXLRYQETY

not attested not anchored not stored refs pending

Observations of 44 extragalactic radio sources with the VLBA at 92cm: A List of Potential Calibrators and Targets for LOFAR and RadioAstron

A. Polatidis, H. Rampadarath, M.A. Garrett

arxiv:0904.0478 v1 · 2009-04-02 · 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{YBTBP2RK5VYYMJRUGQXLRYQETY}

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	2026-05-18T02:14:07.862867Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c06617ea2aed71862634342eb8e2049e1b503c23280d93b79e9ca4125af9a7cb

Aliases

arxiv: 0904.0478 · arxiv_version: 0904.0478v1 · doi: 10.48550/arxiv.0904.0478 · pith_short_12: YBTBP2RK5VYY · pith_short_16: YBTBP2RK5VYYMJRU · pith_short_8: YBTBP2RK

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/YBTBP2RK5VYYMJRUGQXLRYQETY \
  | 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: c06617ea2aed71862634342eb8e2049e1b503c23280d93b79e9ca4125af9a7cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6024c7c26a7d747ba629a80b63d6b51284472b44b072e6c41d005793846d3a4a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-02T21:57:51Z",
    "title_canon_sha256": "d48e26d9bc74b0600b783e4030d146335ed95aa6aadc657c56adbfb4e50e4ced"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.0478",
    "kind": "arxiv",
    "version": 1
  }
}