Pith Number

pith:XDMD3YYL

pith:1994:XDMD3YYLC2POTAUYT5OIFSVLXC

not attested not anchored not stored refs pending

Are BL Lacertae Objects Beamed QSO Remnants?

E.F. Borra

arxiv:astro-ph/9408020 v1 · 1994-08-05 · 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{XDMD3YYLC2POTAUYT5OIFSVLXC}

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	2026-07-04T14:14:29.203728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8d83de30b169ee982989f5c82caabb89ee11aa24bdf31bc35a734dffdaacc64

Aliases

arxiv: astro-ph/9408020 · arxiv_version: astro-ph/9408020v1 · doi: 10.48550/arxiv.astro-ph/9408020 · pith_short_12: XDMD3YYLC2PO · pith_short_16: XDMD3YYLC2POTAUY · pith_short_8: XDMD3YYL

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/XDMD3YYLC2POTAUYT5OIFSVLXC \
  | 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: b8d83de30b169ee982989f5c82caabb89ee11aa24bdf31bc35a734dffdaacc64

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e8d494ca08406e97663edb3e7f9f580cf20cd27ff2f8ec777e4c5e37a6d05553",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1994-08-05T18:02:42Z",
    "title_canon_sha256": "226dc5684470ac0a8eb324694258b1454f0cd875a379bd4368bdf9d01e376c34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9408020",
    "kind": "arxiv",
    "version": 1
  }
}