Pith Number

pith:DI4BNF5E

pith:1997:DI4BNF5ESFNR4VGU3SHDTNXAFY

not attested not anchored not stored refs pending

Neutron Star Masses and Radii as Inferred from kilo-Hertz QPOs

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

arxiv:astro-ph/9703151 v1 · 1997-03-24 · 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{DI4BNF5ESFNR4VGU3SHDTNXAFY}

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	2026-07-04T16:02:56.005288Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a381697a4915b1e54d4dc8e39b6e02e199e6996240871d681d14f099ba92e1b

Aliases

arxiv: astro-ph/9703151 · arxiv_version: astro-ph/9703151v1 · doi: 10.48550/arxiv.astro-ph/9703151 · pith_short_12: DI4BNF5ESFNR · pith_short_16: DI4BNF5ESFNR4VGU · pith_short_8: DI4BNF5E

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/DI4BNF5ESFNR4VGU3SHDTNXAFY \
  | 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: 1a381697a4915b1e54d4dc8e39b6e02e199e6996240871d681d14f099ba92e1b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9299a87a166d0244a6dff7ae4fda41ea8ed9b24b32712d94b96d0fdd306eafa4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-03-24T19:51:47Z",
    "title_canon_sha256": "7caae4712440cc66bdcebd5228f33466a651cd81ec30d254cf5476e1854cd299"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9703151",
    "kind": "arxiv",
    "version": 1
  }
}