Pith Number

pith:YSWS4HTJ

pith:2001:YSWS4HTJJ7I3MIO3TNEA42CGWS

not attested not anchored not stored refs pending

Emission-Line Properties of z > 4 Quasars

Anca Constantin (Ohio U.), Craig B. Foltz (MMT Observatory), Frederic H. Chaffee (Keck Observatory), Fred Hamann (U. Florida), Joseph C. Shields (Ohio U.)

arxiv:astro-ph/0109328 v1 · 2001-09-19 · 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{YSWS4HTJJ7I3MIO3TNEA42CGWS}

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	2026-05-18T02:40:35.943680Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c4ad2e1e694fd1b621db9b480e6846b4a8529a4b3f4641bb3374f8f34392f5d3

Aliases

arxiv: astro-ph/0109328 · arxiv_version: astro-ph/0109328v1 · doi: 10.48550/arxiv.astro-ph/0109328 · pith_short_12: YSWS4HTJJ7I3 · pith_short_16: YSWS4HTJJ7I3MIO3 · pith_short_8: YSWS4HTJ

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/YSWS4HTJJ7I3MIO3TNEA42CGWS \
  | 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: c4ad2e1e694fd1b621db9b480e6846b4a8529a4b3f4641bb3374f8f34392f5d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d9cbf0900da144a140f21159425fa3633f83b2102982158d043fa30a30832d73",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-09-19T22:04:47Z",
    "title_canon_sha256": "31a5fe3c1404c20477b2a1517aed6a04a0db07dddebc2fe5a1bbe1e7513c1c9c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0109328",
    "kind": "arxiv",
    "version": 1
  }
}