Pith Number

pith:HCBMBZ24

pith:2019:HCBMBZ247FCO6FP5OOIUU4OOHZ

not attested not anchored not stored refs pending

A Cool Accretion Disk around the Galactic Centre Black Hole

Anna Pancoast, Elena M. Murchikova, E. Sterl Phinney, Roger D. Blandford

arxiv:1906.08289 v1 · 2019-06-19 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HCBMBZ247FCO6FP5OOIUU4OOHZ}

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	2026-05-17T23:42:52.880228Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3882c0e75cf944ef15fd73914a71ce3e59c82090cd67614160e8026967277d59

Aliases

arxiv: 1906.08289 · arxiv_version: 1906.08289v1 · doi: 10.48550/arxiv.1906.08289 · pith_short_12: HCBMBZ247FCO · pith_short_16: HCBMBZ247FCO6FP5 · pith_short_8: HCBMBZ24

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/HCBMBZ247FCO6FP5OOIUU4OOHZ \
  | 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: 3882c0e75cf944ef15fd73914a71ce3e59c82090cd67614160e8026967277d59

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d21d8417048cdc718c033445c9691312f598dc725dec5d4f39a5125cf4f23446",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-06-19T18:14:21Z",
    "title_canon_sha256": "925aada6eb630751a88276354531d9dad03c8c7c18350bdf2b53396fc35941ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.08289",
    "kind": "arxiv",
    "version": 1
  }
}