Pith Number

pith:BWWDYDGA

pith:2011:BWWDYDGAXX3RNLLHYMZLYPXIPS

not attested not anchored not stored refs pending

Deep Fabry-Perot Halpha observations of two Sculptor group galaxies, NGC 247 and NGC 300

B. Epinat, C. Carignan, J. Hlavacek-Larrondo, M. Marcelin, M.-M. de Denus-Baillargeon, O. Daigle, O. Hernandez

arxiv:1105.2456 v1 · 2011-05-12 · 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{BWWDYDGAXX3RNLLHYMZLYPXIPS}

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	2026-05-18T02:01:59.183012Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0dac3c0cc0bdf716ad67c332bc3ee87ca2d6e3dd13855f46c94249d5da606542

Aliases

arxiv: 1105.2456 · arxiv_version: 1105.2456v1 · doi: 10.48550/arxiv.1105.2456 · pith_short_12: BWWDYDGAXX3R · pith_short_16: BWWDYDGAXX3RNLLH · pith_short_8: BWWDYDGA

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/BWWDYDGAXX3RNLLHYMZLYPXIPS \
  | 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: 0dac3c0cc0bdf716ad67c332bc3ee87ca2d6e3dd13855f46c94249d5da606542

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7b8fffafaffebb10f20a7db4be840383fc57f14b21e8039bb1db63850655b203",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-05-12T12:59:26Z",
    "title_canon_sha256": "2c69a87dbe64f7f17b656c25c62cbaaa2cb5414c72d35f70d51d3c8192c7bd81"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.2456",
    "kind": "arxiv",
    "version": 1
  }
}