Pith Number

pith:2SAD4YVY

pith:2017:2SAD4YVYMJJ7MMUGS5RPTQVEWT

not attested not anchored not stored refs pending

Analysis of carbon monoxied absorption at z=2.5 to constrain variation of the proton-to-electron mass ratio

M. Dapr\`a, M. T. Murphy, M. Vonk, P. Noterdaeme, W. Ubachs

arxiv:1702.03132 v1 · 2017-02-10 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2SAD4YVYMJJ7MMUGS5RPTQVEWT}

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	2026-05-18T00:48:14.673014Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4803e62b86253f632869762f9c2a4b4c36250ca15a68989d556ed1722c0e6a4

Aliases

arxiv: 1702.03132 · arxiv_version: 1702.03132v1 · doi: 10.48550/arxiv.1702.03132 · pith_short_12: 2SAD4YVYMJJ7 · pith_short_16: 2SAD4YVYMJJ7MMUG · pith_short_8: 2SAD4YVY

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/2SAD4YVYMJJ7MMUGS5RPTQVEWT \
  | 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: d4803e62b86253f632869762f9c2a4b4c36250ca15a68989d556ed1722c0e6a4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "360dae45e4488c4da96f9e034d61a472412220f4a698f01e771111eaeea8c321",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2017-02-10T11:19:54Z",
    "title_canon_sha256": "362a4eaf9d5888b81f75d1c10617978429ecf0ec0c880bebb2591d2505bff0e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.03132",
    "kind": "arxiv",
    "version": 1
  }
}