Pith Number

pith:VBRNBCAG

pith:2011:VBRNBCAGXGXUKOUNORWR2VT4S7

not attested not anchored not stored refs pending

Precision Spectrophotometry at the Level of 0.1%

Renbin Yan

arxiv:1107.5040 v2 · 2011-07-25 · astro-ph.IM · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VBRNBCAGXGXUKOUNORWR2VT4S7}

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	2026-05-18T04:11:07.160521Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a862d08806b9af453a8d746d1d567c97cda3a8da6653bf4c67fcf1ce5152d955

Aliases

arxiv: 1107.5040 · arxiv_version: 1107.5040v2 · doi: 10.48550/arxiv.1107.5040 · pith_short_12: VBRNBCAGXGXU · pith_short_16: VBRNBCAGXGXUKOUN · pith_short_8: VBRNBCAG

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/VBRNBCAGXGXUKOUNORWR2VT4S7 \
  | 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: a862d08806b9af453a8d746d1d567c97cda3a8da6653bf4c67fcf1ce5152d955

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "042150fcaefb11162a4ba91dda24d61ce0e4bd7e3d7c43bb981212f96fb8dd38",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2011-07-25T20:00:01Z",
    "title_canon_sha256": "221a5b497f1dc338b676c234c60509b020be1ba91589af376e745a9f72197197"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.5040",
    "kind": "arxiv",
    "version": 2
  }
}