Pith Number

pith:DYZ2CZF3

pith:1995:DYZ2CZF3L7JU7MZTU4REOEZB7T

not attested not anchored not stored refs pending

HST Images of the Eclipsing Pulsar B1957+20

Andrew S. Fruchter, Charles D. Bailyn, Jay Bookbinder

arxiv:astro-ph/9502084 v1 · 1995-02-19 · 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{DYZ2CZF3L7JU7MZTU4REOEZB7T}

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	2026-05-18T01:07:42.130115Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e33a164bb5fd34fb333a722471321fcc2f69736010a4eb3c4b5afc2debadf47

Aliases

arxiv: astro-ph/9502084 · arxiv_version: astro-ph/9502084v1 · doi: 10.48550/arxiv.astro-ph/9502084 · pith_short_12: DYZ2CZF3L7JU · pith_short_16: DYZ2CZF3L7JU7MZT · pith_short_8: DYZ2CZF3

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/DYZ2CZF3L7JU7MZTU4REOEZB7T \
  | 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: 1e33a164bb5fd34fb333a722471321fcc2f69736010a4eb3c4b5afc2debadf47

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "185caab8e08e7b1f8a2270863b77c6ae146d07f3ec2384005ce833b3c0dc097d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-02-19T23:27:52Z",
    "title_canon_sha256": "3dc38d9d5a68afd21a2d3cf1c21ceeb2e44c27a697f22e4e337c3bcbac49e11d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9502084",
    "kind": "arxiv",
    "version": 1
  }
}