Pith Number

pith:SEZGLJWW

pith:2016:SEZGLJWW2WK4IUVYQUVERPL6YA

not attested not anchored not stored refs pending

Artificial intelligence applied to the automatic analysis of absorption spectra. Objective measurement of the fine structure constant

John K. Webb, Matthew B. Bainbridge

arxiv:1606.07393 v2 · 2016-06-23 · 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{SEZGLJWW2WK4IUVYQUVERPL6YA}

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.

Cited by

1 paper in Pith

Machine Learning Techniques for Astrophysics and Cosmology: Lyman-$\alpha$ forest

Receipt and verification

First computed	2026-05-18T00:51:48.481177Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

913265a6d6d595c452b8852a48bd7ec00b2880876a9c97ec2b54ff97d3230afe

Aliases

arxiv: 1606.07393 · arxiv_version: 1606.07393v2 · doi: 10.48550/arxiv.1606.07393 · pith_short_12: SEZGLJWW2WK4 · pith_short_16: SEZGLJWW2WK4IUVY · pith_short_8: SEZGLJWW

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/SEZGLJWW2WK4IUVYQUVERPL6YA \
  | 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: 913265a6d6d595c452b8852a48bd7ec00b2880876a9c97ec2b54ff97d3230afe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90d8acd7bee5cfe269d3c4c49b585be7eaa6b0c1f180b4ea897f6e60c541598b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2016-06-23T18:21:21Z",
    "title_canon_sha256": "d26c996cbf5097c99a907c5691f68490d0a0219b9719db155f973c466fe48a0a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.07393",
    "kind": "arxiv",
    "version": 2
  }
}