Pith Number

pith:PHVWWAMB

pith:2009:PHVWWAMBFBQ576DDT5K6NTJLOY

not attested not anchored not stored refs pending

Twelve years of X-ray and optical variability in the Seyfert galaxy NGC 4051

E. Breedt, I. M. McHardy, N. G. Chesnok, P. Arevalo, P. Lira, P. Uttley, S. G. Sergeev, T. Minezaki, Y. Sakata, Y. Yoshii

arxiv:0912.0544 v1 · 2009-12-02 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PHVWWAMBFBQ576DDT5K6NTJLOY}

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	2026-05-18T02:10:34.418916Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79eb6b01812861dff8639f55e6cd2b762e7915993e9fe01c7ede1e007864c72f

Aliases

arxiv: 0912.0544 · arxiv_version: 0912.0544v1 · doi: 10.48550/arxiv.0912.0544 · pith_short_12: PHVWWAMBFBQ5 · pith_short_16: PHVWWAMBFBQ576DD · pith_short_8: PHVWWAMB

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/PHVWWAMBFBQ576DDT5K6NTJLOY \
  | 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: 79eb6b01812861dff8639f55e6cd2b762e7915993e9fe01c7ede1e007864c72f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5b40d01f6959b0d3f782d9663c8245b3876b89e1617a622cf5f9e93e66bb5a9",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-12-02T22:20:28Z",
    "title_canon_sha256": "ad654e6252543ba1f11ad42ccb7e7c904328d0f397fbd020ad5bb9e3cd3e4ca0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0544",
    "kind": "arxiv",
    "version": 1
  }
}