Pith Number

pith:72XCLPPH

pith:2010:72XCLPPHR6XQXB4GG6O4BBOSC4

not attested not anchored not stored refs pending

H-alpha monitoring of OJ 287 in 2005-08

A. Sillanp\"a\"a, H. J. Lehto, K. Nilsson, L. O. Takalo

arxiv:1004.2617 v1 · 2010-04-15 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{72XCLPPHR6XQXB4GG6O4BBOSC4}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:08:05.213906Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

feae25bde78faf0b8786379dc085d2170e1663c5a9350228d15e72b27aac4a2e

Aliases

arxiv: 1004.2617 · arxiv_version: 1004.2617v1 · doi: 10.48550/arxiv.1004.2617 · pith_short_12: 72XCLPPHR6XQ · pith_short_16: 72XCLPPHR6XQXB4G · pith_short_8: 72XCLPPH

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/72XCLPPHR6XQXB4GG6O4BBOSC4 \
  | 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: feae25bde78faf0b8786379dc085d2170e1663c5a9350228d15e72b27aac4a2e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29b90acfbf051aa87d25449195679d4f5b99128d6a7083935c4cd74119d3dfd8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-04-15T12:10:59Z",
    "title_canon_sha256": "1065b68293dd0d2abe443c30c6b3841400e2000040521fa4f62ab62a77afe05c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.2617",
    "kind": "arxiv",
    "version": 1
  }
}