Pith Number

pith:LLFAYXUR

pith:2001:LLFAYXUR266FDRLEOOTQZ7D6R4

not attested not anchored not stored refs pending

NICMOS Observations of Extragalactic Cepheids. I. Photometry Database and a Test of the Standard Extinction Law

(2) STScI, (3) OCIW, (4) Swinburne, (5) Carnegie DTM, (6) RGO, 7), (7) IPAC, (8) MSSSO, (9) DAO), B.F. Madore (3, B.K. Gibson (4), D. Calzetti (2), J.A. Graham (5), J.P. Huchra (1), J.R. Mould (8), L.M. Macri (1), P.B. Stetson (9) ((1) CfA, S.E. Persson (3), S.M.G. Hughes (6), W.L. Freedman (3)

arxiv:astro-ph/0102125 v1 · 2001-02-07 · 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{LLFAYXUR266FDRLEOOTQZ7D6R4}

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	2026-07-04T16:22:41.355050Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5aca0c5e91d7bc51c56473a70cfc7e8f3ecbfba098a872f1063f54beaa257d92

Aliases

arxiv: astro-ph/0102125 · arxiv_version: astro-ph/0102125v1 · doi: 10.48550/arxiv.astro-ph/0102125 · pith_short_12: LLFAYXUR266F · pith_short_16: LLFAYXUR266FDRLE · pith_short_8: LLFAYXUR

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/LLFAYXUR266FDRLEOOTQZ7D6R4 \
  | 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: 5aca0c5e91d7bc51c56473a70cfc7e8f3ecbfba098a872f1063f54beaa257d92

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22302ed8710034f68d97c8bcd89d25018f09c51003a868427ff481e33e830243",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-02-07T21:30:39Z",
    "title_canon_sha256": "4372a5280453ce32923ac07b0c838656ca599bf8ae253aa599baa270ce493fdb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0102125",
    "kind": "arxiv",
    "version": 1
  }
}