Pith Number

pith:H45PQ3FQ

pith:2020:H45PQ3FQSOWNTL4BOSJISMU762

not attested not anchored not stored refs pending

A crucial test for astronomical spectrograph calibration with frequency combs

Alejandro Su\'arez Mascare\~no, Anna Brucalassi, Antonio Manescau, Borja Toledo-Padr\'on, Bruno L. Canto Martins, Dinko Milakovi\'c, Eszter Pozna, Florian Kerber, Frank Grupp, Gaspare Lo Curto, Gerardo Avila, Hanna Kellermann, Izan de Castro Le\~ao, Jonay I. Gonz\'alez Hern\'andez, Josefina Urrutia, Jos\'e Renan De Medeiros, Luca Pasquini, Massimiliano Esposito, Olaf Mandel, Rafael A. Probst, Rafael Rebolo, Ronald Holzwarth, Theodor W. H\"ansch, Thomas Udem, Tilo Steinmetz, Yuanjie Wu

arxiv:2002.08868 v1 · 2020-02-20 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H45PQ3FQSOWNTL4BOSJISMU762}

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	2026-07-05T00:42:39.621518Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f3af86cb093acd9af81749289329ff6af8f9b117c896183c6dfc31ec878b9f8

Aliases

arxiv: 2002.08868 · arxiv_version: 2002.08868v1 · doi: 10.48550/arxiv.2002.08868 · pith_short_12: H45PQ3FQSOWN · pith_short_16: H45PQ3FQSOWNTL4B · pith_short_8: H45PQ3FQ

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/H45PQ3FQSOWNTL4BOSJISMU762 \
  | 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: 3f3af86cb093acd9af81749289329ff6af8f9b117c896183c6dfc31ec878b9f8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ef8ca9012c12e5fb8d68a68178650da196e17ef3c3f8199f5376bc72b16499b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2020-02-20T17:07:42Z",
    "title_canon_sha256": "1ed39933dc9a09f1a170a8ea64bdee4682606aad24368f7ad2baccfe4a79e4de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.08868",
    "kind": "arxiv",
    "version": 1
  }
}