Pith Number

pith:2AHLG42V

pith:2009:2AHLG42VW4GRND2GU43EMSTYH3

not attested not anchored not stored refs pending

58 Radio Sources Near Bright Natural Guide Stars

(2) SOFIA-USRA, B. Stalder (1), K. C. Chambers (1), NASA Ames Research Center), University of Hawaii, William D. Vacca (3) ((1) Institute for Astronomy

arxiv:0909.1566 v1 · 2009-09-08 · 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{2AHLG42VW4GRND2GU43EMSTYH3}

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	2026-05-18T02:34:30.722578Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d00eb37355b70d168f46a736464a783ee2e481bea2525445f246b2dde5e70fbd

Aliases

arxiv: 0909.1566 · arxiv_version: 0909.1566v1 · doi: 10.48550/arxiv.0909.1566 · pith_short_12: 2AHLG42VW4GR · pith_short_16: 2AHLG42VW4GRND2G · pith_short_8: 2AHLG42V

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/2AHLG42VW4GRND2GU43EMSTYH3 \
  | 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: d00eb37355b70d168f46a736464a783ee2e481bea2525445f246b2dde5e70fbd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a3c815834e3cdbcd666a51a7c76cdf692c6e40cac7e495111a9f930a7cc9554c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-08T21:42:08Z",
    "title_canon_sha256": "fa151426ab95489978b1623f51ebed1f4f92902f098598f95daf388b828727ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1566",
    "kind": "arxiv",
    "version": 1
  }
}