Pith Number

pith:M24VW5D6

pith:2009:M24VW5D64DFA6I3RNNH75QLXK3

not attested not anchored not stored refs pending

Astrometric Redshifts for Quasars

(2) LBNL), David J. Schlegel (2) ((1) Drexel University, Gordon T. Richards (1), Michael C. Kaczmarczik (1), Sajjan S. Mehta (1)

arxiv:0904.3909 v1 · 2009-04-24 · astro-ph.GA · 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{M24VW5D64DFA6I3RNNH75QLXK3}

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	2026-05-18T02:34:59.564882Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

66b95b747ee0ca0f23716b4ffec17756ce0c89ac4ebc7c63045d9caa5b66c21b

Aliases

arxiv: 0904.3909 · arxiv_version: 0904.3909v1 · doi: 10.48550/arxiv.0904.3909 · pith_short_12: M24VW5D64DFA · pith_short_16: M24VW5D64DFA6I3R · pith_short_8: M24VW5D6

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/M24VW5D64DFA6I3RNNH75QLXK3 \
  | 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: 66b95b747ee0ca0f23716b4ffec17756ce0c89ac4ebc7c63045d9caa5b66c21b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab8842af4ab7d6612c5c7babadac190649e7df20a71026090671115e653ff0c8",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-04-24T17:00:45Z",
    "title_canon_sha256": "e734aecc278253e911b5fbf3cf1f3a9ba34bbce29bb3c457edd06aa3a4855274"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.3909",
    "kind": "arxiv",
    "version": 1
  }
}