Pith Number

pith:67PYT54F

pith:2009:67PYT54FYXW7V3VST6IAHVMY77

not attested not anchored not stored refs pending

A new apparent quasar pair: Q2225-403A,B

A. Treves, R. Decarli, R. Falomo

arxiv:0903.2233 v1 · 2009-03-12 · 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{67PYT54FYXW7V3VST6IAHVMY77}

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	2026-07-04T17:14:33.266149Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f7df89f785c5edfaeeb29f9003d598ffd5a401662e7dac4b5f00dd75afd24af0

Aliases

arxiv: 0903.2233 · arxiv_version: 0903.2233v1 · doi: 10.48550/arxiv.0903.2233 · pith_short_12: 67PYT54FYXW7 · pith_short_16: 67PYT54FYXW7V3VS · pith_short_8: 67PYT54F

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/67PYT54FYXW7V3VST6IAHVMY77 \
  | 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: f7df89f785c5edfaeeb29f9003d598ffd5a401662e7dac4b5f00dd75afd24af0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2202c69c8b11b363fdd6ab958ede09edd72ec584b62878d55f2bf13abb968b4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-12T18:15:30Z",
    "title_canon_sha256": "53ba6893b8a369fa16108533b6370a38fa0b53476497c1b33e261df3540a8416"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.2233",
    "kind": "arxiv",
    "version": 1
  }
}