Pith Number

pith:4UMXCEFX

pith:2025:4UMXCEFXJBU2KHNPSXLGNA6H4S

not attested not anchored not stored refs pending

NuAncestor: an artificial satellite-borne star for accurate frequency calibration of ground-based EPRV spectrographs

A. Baur, A. Deep, B. Crazzolara, B. Soja, C. Broeg, Ch. Mordasini, C. Praplan, E. Bozzo, E. Obrzud, F. Droz, F. Pepe, H. Haile, J. Berney, J. Figuereido, J. Moerschell, L. Jolissaint, M. Bugatti, M. Sarajlic, M. Van den Broeck, S. Lecomte

arxiv:2507.08413 v1 · 2025-07-11 · 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{4UMXCEFXJBU2KHNPSXLGNA6H4S}

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	2026-07-05T11:35:37.753881Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5197110b74869a51daf95d66683c7e4a95964124cd213bedb34225f778e46a7

Aliases

arxiv: 2507.08413 · arxiv_version: 2507.08413v1 · doi: 10.48550/arxiv.2507.08413 · pith_short_12: 4UMXCEFXJBU2 · pith_short_16: 4UMXCEFXJBU2KHNP · pith_short_8: 4UMXCEFX

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/4UMXCEFXJBU2KHNPSXLGNA6H4S \
  | 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: e5197110b74869a51daf95d66683c7e4a95964124cd213bedb34225f778e46a7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e637ff8bb0df9b640c4066798e7a43d88c8f5cf63e97c393b17d2f1826982ba8",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2025-07-11T08:54:05Z",
    "title_canon_sha256": "79c6b9b19b77d1935de5feb8ff8f533ceb5e864bd614233023720ee0db579be1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.08413",
    "kind": "arxiv",
    "version": 1
  }
}