Pith Number

pith:4EJW2SQ6

pith:1999:4EJW2SQ6VFXLRS2LFSOZVO6OPN

not attested not anchored not stored refs pending

On the nature of the FBS blue stellar objects and the completeness of the bright quasar survey

A.C. Goncalves, M.A. Mickaelian (BAO), M.-P. Veron-Cetty, P. Veron (OHP)

arxiv:astro-ph/9901173 v1 · 1999-01-13 · 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{4EJW2SQ6VFXLRS2LFSOZVO6OPN}

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	2026-05-18T01:33:49.557018Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1136d4a1ea96eb8cb4b2c9d9abbce7b4217a85e38544006c8623f25a0daa0d1

Aliases

arxiv: astro-ph/9901173 · arxiv_version: astro-ph/9901173v1 · doi: 10.48550/arxiv.astro-ph/9901173 · pith_short_12: 4EJW2SQ6VFXL · pith_short_16: 4EJW2SQ6VFXLRS2L · pith_short_8: 4EJW2SQ6

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/4EJW2SQ6VFXLRS2LFSOZVO6OPN \
  | 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: e1136d4a1ea96eb8cb4b2c9d9abbce7b4217a85e38544006c8623f25a0daa0d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6557638331fd4f5259a9cc5cdf81a5114e1fec116d91149a72e9c30eb2479fd5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-01-13T18:05:46Z",
    "title_canon_sha256": "7e48cb624e7f5bc8a2ff8586728964c5026a3e0a9cb91ee441bd84e46c66ef16"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9901173",
    "kind": "arxiv",
    "version": 1
  }
}