Pith Number

pith:UGCYTS3F

pith:1995:UGCYTS3FIJSMI4CYK3XW5UTUN6

not attested not anchored not stored refs pending

What is 3C 324?

Arjun Dey (UC Berkeley/IGPP), Hyron Spinrad (UC Berkeley), Mark Dickinson (STScI)

arxiv:astro-ph/9512090 v2 · 1995-12-13 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UGCYTS3FIJSMI4CYK3XW5UTUN6}

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	2026-05-18T01:40:22.144361Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a18589cb654264c4705856ef6ed2746fba92977c7f292660c9818b93029aeeb5

Aliases

arxiv: astro-ph/9512090 · arxiv_version: astro-ph/9512090v2 · doi: 10.48550/arxiv.astro-ph/9512090 · pith_short_12: UGCYTS3FIJSM · pith_short_16: UGCYTS3FIJSMI4CY · pith_short_8: UGCYTS3F

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/UGCYTS3FIJSMI4CYK3XW5UTUN6 \
  | 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: a18589cb654264c4705856ef6ed2746fba92977c7f292660c9818b93029aeeb5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0178a3467b1b9274dc931e4973f76dd8f6434b5fb3f92d7b8b71d7e450262e5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-12-13T20:46:30Z",
    "title_canon_sha256": "a0d3256336ddbe44d2d003d92269b37d708db9815289ae748110a502afb0967e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9512090",
    "kind": "arxiv",
    "version": 2
  }
}