Pith Number

pith:FXSKQQYX

pith:1999:FXSKQQYXXM2ZDVH6UN3YARDFIT

not attested not anchored not stored refs pending

Fuelling quasars with hot gas

A. C. Fabian, P. E. J. Nulsen

arxiv:astro-ph/9908282 v1 · 1999-08-25 · 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{FXSKQQYXXM2ZDVH6UN3YARDFIT}

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	2026-05-18T01:07:36.119179Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2de4a84317bb3591d4fea37780446544ef989ba1746a26b01d1867cc925f272d

Aliases

arxiv: astro-ph/9908282 · arxiv_version: astro-ph/9908282v1 · doi: 10.48550/arxiv.astro-ph/9908282 · pith_short_12: FXSKQQYXXM2Z · pith_short_16: FXSKQQYXXM2ZDVH6 · pith_short_8: FXSKQQYX

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/FXSKQQYXXM2ZDVH6UN3YARDFIT \
  | 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: 2de4a84317bb3591d4fea37780446544ef989ba1746a26b01d1867cc925f272d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61762fca57771b4ecd61fd291cc0c232dae71a01a6a481037feaf705a9f8d11f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-08-25T18:33:58Z",
    "title_canon_sha256": "019ee089e2bbf3ccd49cb541cb2ebec8048e4737740bda58c45c135ee62d407f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9908282",
    "kind": "arxiv",
    "version": 1
  }
}