Pith Number

pith:IFEVCSJC

pith:1997:IFEVCSJC5C45JSOMN2J3ML5IDY

not attested not anchored not stored refs pending

Comment on the Measurement of Cosmological Birefringence

J. P. Leahy (University of Manchester)

arxiv:astro-ph/9704285 v2 · 1997-04-29 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IFEVCSJC5C45JSOMN2J3ML5IDY}

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	2026-07-04T15:07:39.163476Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4149514922e8b9d4c9cc6e93b62fa81e3e5715fe51b604e75ebffbf3f282ce61

Aliases

arxiv: astro-ph/9704285 · arxiv_version: astro-ph/9704285v2 · doi: 10.48550/arxiv.astro-ph/9704285 · pith_short_12: IFEVCSJC5C45 · pith_short_16: IFEVCSJC5C45JSOM · pith_short_8: IFEVCSJC

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/IFEVCSJC5C45JSOMN2J3ML5IDY \
  | 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: 4149514922e8b9d4c9cc6e93b62fa81e3e5715fe51b604e75ebffbf3f282ce61

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d79c8cb2df134f7f918b071ae68566e4b71346644650000f9d70cd88e567d1f1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-04-29T19:14:34Z",
    "title_canon_sha256": "80be4da280f8d052d5589721aedbdf8d97042b8a9688e239b8048152b34394da"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9704285",
    "kind": "arxiv",
    "version": 2
  }
}