Pith Number

pith:X376REOP

pith:1993:X376REOPP7Q3FYRLB26OOXD4RY

not attested not anchored not stored refs pending

Lick Slit Spectra of Thirty-Eight Objective Prism QSO Candidates and Low Metallicity Halo Stars

D. Tytler, R.D. Cohen, V.T. Junkkarinen, X.-M Fan

arxiv:astro-ph/9305025 v1 · 1993-05-19 · 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{X376REOPP7Q3FYRLB26OOXD4RY}

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	2026-07-04T15:55:06.551831Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

beffe891cf7fe1b2e22b0ebce75c7c8e32d7dbd9eb33d0e748440176a0ce7955

Aliases

arxiv: astro-ph/9305025 · arxiv_version: astro-ph/9305025v1 · doi: 10.48550/arxiv.astro-ph/9305025 · pith_short_12: X376REOPP7Q3 · pith_short_16: X376REOPP7Q3FYRL · pith_short_8: X376REOP

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/X376REOPP7Q3FYRLB26OOXD4RY \
  | 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: beffe891cf7fe1b2e22b0ebce75c7c8e32d7dbd9eb33d0e748440176a0ce7955

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29fdad663208649b2bb549c4d8884114884f79bc8d07085cdae05b2f2d0d818d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1993-05-19T22:30:23Z",
    "title_canon_sha256": "690d84208da78f991419dc68995f6a23af3ec76fec5ecded9846aa475e47ad4a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9305025",
    "kind": "arxiv",
    "version": 1
  }
}