Pith Number

pith:NWBCYQ2U

pith:2009:NWBCYQ2UCKE7AF46ULV7ABGYMV

not attested not anchored not stored refs pending

A blind HI survey in the Canes Venatici region

J. M. van der Hulst, K. Kovac, T. A. Oosterloo

arxiv:0904.2775 v1 · 2009-04-19 · 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{NWBCYQ2UCKE7AF46ULV7ABGYMV}

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	2026-05-18T02:13:59.370413Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d822c43541289f0179ea2ebf004d865560267291979802f1b33cb8ce08e4de5

Aliases

arxiv: 0904.2775 · arxiv_version: 0904.2775v1 · doi: 10.48550/arxiv.0904.2775 · pith_short_12: NWBCYQ2UCKE7 · pith_short_16: NWBCYQ2UCKE7AF46 · pith_short_8: NWBCYQ2U

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/NWBCYQ2UCKE7AF46ULV7ABGYMV \
  | 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: 6d822c43541289f0179ea2ebf004d865560267291979802f1b33cb8ce08e4de5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2974dcc814356deb41722ed3f54becf1d526246b830a3ee0e70a2e0acf72fc9c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-19T13:48:32Z",
    "title_canon_sha256": "6507cfbf77f02c5ab3c2b5dd231fb5ee3a0c887f226d39ea8f1faabf1098a8f0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2775",
    "kind": "arxiv",
    "version": 1
  }
}