Pith Number

pith:BON7YCBC

pith:2000:BON7YCBCM5MG56GKLCBKU4GARF

not attested not anchored not stored refs pending

Observations of the BL Lacertae Object OJ 287 in 1997 April and Nov ember

(2) Saitama University), Kazuo Makishima(1) ((1) University of Tokyo, Makoto Tashiro (2), Masahiko Sugiho (1), Naoki Isobe (1)

arxiv:astro-ph/0011046 v1 · 2000-11-02 · 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{BON7YCBCM5MG56GKLCBKU4GARF}

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	2026-05-18T01:40:45.342764Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0b9bfc082267586ef8ca5882aa70c08950918147c5d02a75bcf0027ecd561b38

Aliases

arxiv: astro-ph/0011046 · arxiv_version: astro-ph/0011046v1 · doi: 10.48550/arxiv.astro-ph/0011046 · pith_short_12: BON7YCBCM5MG · pith_short_16: BON7YCBCM5MG56GK · pith_short_8: BON7YCBC

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/BON7YCBCM5MG56GKLCBKU4GARF \
  | 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: 0b9bfc082267586ef8ca5882aa70c08950918147c5d02a75bcf0027ecd561b38

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "519b2d51052be4733b9ab6a09f2d768ce85746cd4b854d1442ec03c081ecd758",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-11-02T05:51:44Z",
    "title_canon_sha256": "64361a4cff7e444ae72ef3a1853898485eb2dec22c1876ee673efbeb4bb0e0c5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0011046",
    "kind": "arxiv",
    "version": 1
  }
}