Pith Number

pith:C4N4V4NX

pith:1999:C4N4V4NX6ABNDICAXY7VEPDLCQ

not attested not anchored not stored refs pending

The HST Key Project on the Extragalactic Distance Scale. XXII. The Discovery of Cepheids in NGC 1326-A

Abhijit Saha, Barry F. Madore, Brad K. Gibson, Charles F. Prosser, Daniel D. Kelson, Fabio Bresolin, Garth D. Illingworth, Holland C. Ford, Jeremy R. Mould, John A. Graham, John G. Hoessel, John P. Huchra, Jr., Laura Ferrarese, Lucas Macri, Nancy A. Silbermann, Peter B. Stetson, Robert C. Kennicutt, Shaun M. Hughes, Shoko Sakai, Wendy L. Freedman

arxiv:astro-ph/9906486 v1 · 1999-06-29 · 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{C4N4V4NX6ABNDICAXY7VEPDLCQ}

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	2026-05-18T03:47:42.422512Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

171bcaf1b7f002d1a040be3f523c6b14119cc98cf2ea3479d73e85f7f5b35f20

Aliases

arxiv: astro-ph/9906486 · arxiv_version: astro-ph/9906486v1 · doi: 10.48550/arxiv.astro-ph/9906486 · pith_short_12: C4N4V4NX6ABN · pith_short_16: C4N4V4NX6ABNDICA · pith_short_8: C4N4V4NX

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/C4N4V4NX6ABNDICAXY7VEPDLCQ \
  | 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: 171bcaf1b7f002d1a040be3f523c6b14119cc98cf2ea3479d73e85f7f5b35f20

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fea11ae2a8bd781552c94007bf626c799c4eed33b5fe1daf535ddfbec8e22622",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-06-29T22:53:53Z",
    "title_canon_sha256": "0a2edadcf7a85ff3cb05e0ae057cd7aa364f1ce8b91d8574dc08adcc18a2fe15"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9906486",
    "kind": "arxiv",
    "version": 1
  }
}