Pith Number

pith:CDQ5PHC4

pith:2008:CDQ5PHC4IK4WYFNZLTLSJMAP34

not attested not anchored not stored refs pending

Astronomical Image Subtraction by Cross-Convolution

Carl W. Akerlof, Fang Yuan

arxiv:0801.0336 v1 · 2008-01-02 · 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{CDQ5PHC4IK4WYFNZLTLSJMAP34}

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	2026-07-04T17:08:16.245353Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10e1d79c5c42b96c15b95cd724b00fdf2b6f85ceaf63e9d3fad7c8ea8d2830b6

Aliases

arxiv: 0801.0336 · arxiv_version: 0801.0336v1 · doi: 10.48550/arxiv.0801.0336 · pith_short_12: CDQ5PHC4IK4W · pith_short_16: CDQ5PHC4IK4WYFNZ · pith_short_8: CDQ5PHC4

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/CDQ5PHC4IK4WYFNZLTLSJMAP34 \
  | 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: 10e1d79c5c42b96c15b95cd724b00fdf2b6f85ceaf63e9d3fad7c8ea8d2830b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "991914802e850129e263e332a89af09014fdf480297c6c54b3ee1a36aaf54f33",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-01-02T04:55:29Z",
    "title_canon_sha256": "d4a0054927fcda3b81177e9a16272c5b8f8da753266afc1adabf735a6c423535"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0801.0336",
    "kind": "arxiv",
    "version": 1
  }
}