Pith Number

pith:VB7EBI7K

pith:2012:VB7EBI7KDDG6IATTHZXJIKQVUR

not attested not anchored not stored refs pending

The UBV(RI)c colors of the Sun

B. V. Castilho, F. van Wyk, I. Ramirez, J. Melendez, L. Casagrande, M. Tucci Maia, R. Michel, R. Sefako, W. J. Schuster

arxiv:1204.0828 v1 · 2012-04-03 · 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{VB7EBI7KDDG6IATTHZXJIKQVUR}

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	2026-05-18T01:57:57.349077Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a87e40a3ea18cde402733e6e942a15a44a933f9f211704afca769d850ec27677

Aliases

arxiv: 1204.0828 · arxiv_version: 1204.0828v1 · doi: 10.48550/arxiv.1204.0828 · pith_short_12: VB7EBI7KDDG6 · pith_short_16: VB7EBI7KDDG6IATT · pith_short_8: VB7EBI7K

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/VB7EBI7KDDG6IATTHZXJIKQVUR \
  | 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: a87e40a3ea18cde402733e6e942a15a44a933f9f211704afca769d850ec27677

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b08b808ab9c9d2930cdb17d720274cf9fab8bfb32b3f90abf5b8d4c80de6112a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-04-03T22:59:13Z",
    "title_canon_sha256": "9b9161d7f4e65f1b96f681c5e15c51f2c136e8053d7a0ce01edfaab1916d488c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.0828",
    "kind": "arxiv",
    "version": 1
  }
}