Pith Number

pith:VSJRM5HK

pith:1997:VSJRM5HKPLUMULJKIIZYUIG5GI

not attested not anchored not stored refs pending

A complete sample of quasars from the 7C redshift survey

Chris J. Willott (Oxford), Katherine M. Blundell (Oxford), Mark Lacy (Oxford), Steve Rawlings (Oxford)

arxiv:astro-ph/9704163 v1 · 1997-04-16 · 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{VSJRM5HKPLUMULJKIIZYUIG5GI}

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	2026-05-18T01:21:56.532175Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac931674ea7ae8ca2d2a42338a20dd320c9976cb4684bdd579e29d563a4a6caf

Aliases

arxiv: astro-ph/9704163 · arxiv_version: astro-ph/9704163v1 · doi: 10.48550/arxiv.astro-ph/9704163 · pith_short_12: VSJRM5HKPLUM · pith_short_16: VSJRM5HKPLUMULJK · pith_short_8: VSJRM5HK

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/VSJRM5HKPLUMULJKIIZYUIG5GI \
  | 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: ac931674ea7ae8ca2d2a42338a20dd320c9976cb4684bdd579e29d563a4a6caf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "92e2b87c6bf4d5dca15eccf2bda5fcb097308836a321b1a1be1a31b613199967",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-04-16T14:27:53Z",
    "title_canon_sha256": "b2154c0add97fc8f4ca93c954e4489de9c82161ba68373a72e1eb87816de1e2c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9704163",
    "kind": "arxiv",
    "version": 1
  }
}