Pith Number

pith:4DHNCTX2

pith:2011:4DHNCTX2QYPBEXKM3VKA4V2BKQ

not attested not anchored not stored refs pending

Ultra stable and very low noise signal source using a cryocooled sapphire oscillator for VLBI

Eugene N. Ivanov, Giorgio Santarelli, John G. Hartnett, Nitin R. Nand

arxiv:1104.4146 v1 · 2011-04-21 · physics.ins-det · 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{4DHNCTX2QYPBEXKM3VKA4V2BKQ}

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	2026-05-18T03:55:47.129040Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0ced14efa861e125d4cdd540e574154306797c810d55bc20e6ddae3bc3afb19

Aliases

arxiv: 1104.4146 · arxiv_version: 1104.4146v1 · doi: 10.48550/arxiv.1104.4146 · pith_short_12: 4DHNCTX2QYPB · pith_short_16: 4DHNCTX2QYPBEXKM · pith_short_8: 4DHNCTX2

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/4DHNCTX2QYPBEXKM3VKA4V2BKQ \
  | 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: e0ced14efa861e125d4cdd540e574154306797c810d55bc20e6ddae3bc3afb19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5a67760c21e2b18ba30e1309922fa94adcbed1dc33628b7a3eb68425dc8f210a",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ins-det",
    "submitted_at": "2011-04-21T00:34:00Z",
    "title_canon_sha256": "5e684e4fd6b116e36384895346f659937d14c92a4ee7c8d160fc815c7a25cbb1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.4146",
    "kind": "arxiv",
    "version": 1
  }
}