Pith Number

pith:YNKTVKXE

pith:1999:YNKTVKXEAMQQ4FV4AB3X3TIKS5

not attested not anchored not stored refs pending

Strong Field Gravity and X-Ray Observations of 4U1820-30

A.P. Smale, A. Santangelo, E.C. Ford, J.E. Grindlay, P.F. Bloser, P. Kaaret, S. Piraino, W. Zhang

arxiv:astro-ph/9905236 v1 · 1999-05-18 · 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{YNKTVKXEAMQQ4FV4AB3X3TIKS5}

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	2026-07-04T16:11:13.711368Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c3553aaae403210e16bc00777dcd0a9749aed5df271694a414af489660c58363

Aliases

arxiv: astro-ph/9905236 · arxiv_version: astro-ph/9905236v1 · doi: 10.48550/arxiv.astro-ph/9905236 · pith_short_12: YNKTVKXEAMQQ · pith_short_16: YNKTVKXEAMQQ4FV4 · pith_short_8: YNKTVKXE

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/YNKTVKXEAMQQ4FV4AB3X3TIKS5 \
  | 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: c3553aaae403210e16bc00777dcd0a9749aed5df271694a414af489660c58363

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eae8869f73c1795055c1d8835ad228395a7755abaa343b4ad376ba2de0a30881",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-05-18T16:53:53Z",
    "title_canon_sha256": "4f516321687ef01e9e8ea01caf81ef8e2271ed7187426c8bb8669c00d99f3c98"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9905236",
    "kind": "arxiv",
    "version": 1
  }
}