Pith Number

pith:7Y52OC6E

pith:1998:7Y52OC6EOLQUQUOSP3LG7ALDAG

not attested not anchored not stored refs pending

The eclipsing X-ray pulsar X-7 in M33

E. Kuulkers, G. Dubus, K.S. Long, P.A. Charles, P.J. Hakala

arxiv:astro-ph/9810050 v1 · 1998-10-03 · 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{7Y52OC6EOLQUQUOSP3LG7ALDAG}

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	2026-07-04T16:07:04.856420Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fe3ba70bc472e14851d27ed66f816301a99dea4b5c52b07575e8fdb09c2add92

Aliases

arxiv: astro-ph/9810050 · arxiv_version: astro-ph/9810050v1 · doi: 10.48550/arxiv.astro-ph/9810050 · pith_short_12: 7Y52OC6EOLQU · pith_short_16: 7Y52OC6EOLQUQUOS · pith_short_8: 7Y52OC6E

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/7Y52OC6EOLQUQUOSP3LG7ALDAG \
  | 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: fe3ba70bc472e14851d27ed66f816301a99dea4b5c52b07575e8fdb09c2add92

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b345bacfacf5fcb454753421a9d8af004fe627deba52648247e63551dbb766da",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-10-03T13:45:00Z",
    "title_canon_sha256": "3e24a06e3c8e581d0b821e8209d2067047a9bbb626a4aacf4b55f1bf26780382"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9810050",
    "kind": "arxiv",
    "version": 1
  }
}