Pith Number

pith:YHZJ4ZX2

pith:2009:YHZJ4ZX2A4BMOQ66DOH2TYNOSW

not attested not anchored not stored refs pending

Photometric Variability in Earthshine Observations

Edwin L. Turner, J. Stuart B. Wyithe, Sally V. Langford

arxiv:0904.0845 v1 · 2009-04-06 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YHZJ4ZX2A4BMOQ66DOH2TYNOSW}

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	2026-05-18T02:14:07.377583Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c1f29e66fa0702c743de1b8fa9e1ae95bf0f7aa71d5af45ae1793e530d27dc77

Aliases

arxiv: 0904.0845 · arxiv_version: 0904.0845v1 · doi: 10.48550/arxiv.0904.0845 · pith_short_12: YHZJ4ZX2A4BM · pith_short_16: YHZJ4ZX2A4BMOQ66 · pith_short_8: YHZJ4ZX2

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/YHZJ4ZX2A4BMOQ66DOH2TYNOSW \
  | 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: c1f29e66fa0702c743de1b8fa9e1ae95bf0f7aa71d5af45ae1793e530d27dc77

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9b33dfeefafa1358689078b46d1aff1b2be63fb84cccec80e5ffb436f75d6736",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-04-06T04:53:04Z",
    "title_canon_sha256": "3e9baa436c563d9f2bf963732e9b66c68c945c207af84af49495db38d5aa19fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.0845",
    "kind": "arxiv",
    "version": 1
  }
}