Pith Number

pith:HGI2C2DP

pith:1999:HGI2C2DP5UIEWCAJCT4GKHG34L

not attested not anchored not stored refs pending

The Nature of Accreting Black Holes in Nearby Galaxy Nuclei

E.J.M. Colbert, R.F. Mushotzky (NASA/GSFC)

arxiv:astro-ph/9901023 v2 · 1999-01-04 · 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{HGI2C2DP5UIEWCAJCT4GKHG34L}

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.

Cited by

1 paper in Pith

Significant or Not? The Impact of Randomisation During Data Reduction on Confirming a New Pulsating Ultraluminous X-ray Source Candidate in Centaurus A

Receipt and verification

First computed	2026-05-18T04:22:51.009430Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3991a1686fed104b080914f8651cdbe2f74bf2eed6770a6a1478e371217cf7d8

Aliases

arxiv: astro-ph/9901023 · arxiv_version: astro-ph/9901023v2 · doi: 10.48550/arxiv.astro-ph/9901023 · pith_short_12: HGI2C2DP5UIE · pith_short_16: HGI2C2DP5UIEWCAJ · pith_short_8: HGI2C2DP

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/HGI2C2DP5UIEWCAJCT4GKHG34L \
  | 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: 3991a1686fed104b080914f8651cdbe2f74bf2eed6770a6a1478e371217cf7d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "99dbb98bf74d3b50665fd48b9f40620d3e2f3ff56c88a085dc695c1c38f69460",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-01-04T16:33:34Z",
    "title_canon_sha256": "c134c65c14908c48d6cb58450dacc0a2ffabaeac4376f9ce0b37130614090a19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9901023",
    "kind": "arxiv",
    "version": 2
  }
}