Pith Number

pith:LR5NWMJS

pith:2009:LR5NWMJSDWZM24TBTGW5FW7S3I

not attested not anchored not stored refs pending

Modeling Total Solar Irradiance Variations Using Automated Classification Software On Mount Wilson Data

D. Parker, J. Boyden, L. Bertello, R.K. Ulrich

arxiv:0909.2392 v1 · 2009-09-14 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LR5NWMJSDWZM24TBTGW5FW7S3I}

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	2026-05-18T02:11:48.447041Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c7adb31321db2cd726199add2dbf2da21ff0eab317a60e9c39005e3ae473b7f

Aliases

arxiv: 0909.2392 · arxiv_version: 0909.2392v1 · doi: 10.48550/arxiv.0909.2392 · pith_short_12: LR5NWMJSDWZM · pith_short_16: LR5NWMJSDWZM24TB · pith_short_8: LR5NWMJS

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/LR5NWMJSDWZM24TBTGW5FW7S3I \
  | 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: 5c7adb31321db2cd726199add2dbf2da21ff0eab317a60e9c39005e3ae473b7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61427323468f4a1aad1dc414be713c65be2a051a5c44e2eb828f04d0ec1c2a2e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-09-14T01:43:26Z",
    "title_canon_sha256": "5ba09d69a7325ac3780fac6f8f3b34197cda78f6a13b4a6ac6a50309fdd863eb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2392",
    "kind": "arxiv",
    "version": 1
  }
}