Pith Number

pith:DTGFINZO

pith:1998:DTGFINZOVQQRQIIQU7R4IICEFX

not attested not anchored not stored refs pending

Correlation Between Energy Spectral States and Fast Time Variability and Further Evidence for the Marginally Stable Orbit in 4U 1820-30

A. P. Smale T. E. Strohmayer, J. H. Swank (Goddard Space Flight Center), W. Zhang

arxiv:astro-ph/9804228 v1 · 1998-04-22 · 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{DTGFINZOVQQRQIIQU7R4IICEFX}

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	2026-07-04T16:06:19.633424Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1ccc54372eac21182110a7e3c420442dd758545f0c47f1fd45fb7de4f9d76e6c

Aliases

arxiv: astro-ph/9804228 · arxiv_version: astro-ph/9804228v1 · doi: 10.48550/arxiv.astro-ph/9804228 · pith_short_12: DTGFINZOVQQR · pith_short_16: DTGFINZOVQQRQIIQ · pith_short_8: DTGFINZO

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/DTGFINZOVQQRQIIQU7R4IICEFX \
  | 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: 1ccc54372eac21182110a7e3c420442dd758545f0c47f1fd45fb7de4f9d76e6c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "008c6dad4a3133100a2727a17090d8d065c011af5d6f36fd04d1321aaccef5e0",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-04-22T18:40:43Z",
    "title_canon_sha256": "7e5c2e376ee001c83a8cd970b618b5fb362f30194318216ac8424c7e88be445b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9804228",
    "kind": "arxiv",
    "version": 1
  }
}