Pith Number

pith:4DSPHWRV

pith:2012:4DSPHWRVWOVADN6SCQFIE4TG4V

not attested not anchored not stored refs pending

The Impact of Frequency Standards on Coherence in VLBI at the Highest Frequencies

J. Hartnett, M. Rioja, R. Dodson, S. Tingay, Y. Asaki

arxiv:1209.3989 v1 · 2012-09-18 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4DSPHWRVWOVADN6SCQFIE4TG4V}

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	2026-05-18T01:54:26.826520Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0e4f3da35b3aa01b7d2140a827266e56622b201c9a564f076ea2543d329f2c0

Aliases

arxiv: 1209.3989 · arxiv_version: 1209.3989v1 · doi: 10.48550/arxiv.1209.3989 · pith_short_12: 4DSPHWRVWOVA · pith_short_16: 4DSPHWRVWOVADN6S · pith_short_8: 4DSPHWRV

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/4DSPHWRVWOVADN6SCQFIE4TG4V \
  | 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: e0e4f3da35b3aa01b7d2140a827266e56622b201c9a564f076ea2543d329f2c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6332932f53d758f3e32087c3ff06b0f37a41de746408b74e20734c5b06ca294f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2012-09-18T15:25:26Z",
    "title_canon_sha256": "9dc15b68483995e924322d2a4e7f6baa6f64a2eab38152deb2427532c8806292"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.3989",
    "kind": "arxiv",
    "version": 1
  }
}