Pith Number

pith:PSZ2H3FW

pith:1995:PSZ2H3FWPKWEP4MAAQI2MFDMS2

not attested not anchored not stored refs pending

WRAY 977 (GX301-2): A HYPERGIANT WITH PULSAR COMPANION

E.J. Zuiderwijk, E.P.J. van den Heuvel, E. Ruymaekers, H.J.G.L.M. Lamers, L. Kaper

arxiv:astro-ph/9503003 v1 · 1995-03-01 · 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{PSZ2H3FWPKWEP4MAAQI2MFDMS2}

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	2026-05-18T01:07:42.044255Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7cb3a3ecb67aac47f1800411a6146c96a390910e0226322d6c27210933ca2b52

Aliases

arxiv: astro-ph/9503003 · arxiv_version: astro-ph/9503003v1 · doi: 10.48550/arxiv.astro-ph/9503003 · pith_short_12: PSZ2H3FWPKWE · pith_short_16: PSZ2H3FWPKWEP4MA · pith_short_8: PSZ2H3FW

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/PSZ2H3FWPKWEP4MAAQI2MFDMS2 \
  | 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: 7cb3a3ecb67aac47f1800411a6146c96a390910e0226322d6c27210933ca2b52

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "79b313b058ffc81d4cb1bade6391d2aaaf82b5c740d95859932ceab04739c6db",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-03-01T11:39:06Z",
    "title_canon_sha256": "0d2c987f17b92289efdc928db8ba06c98b82daffe3befe9a741bfa583836958c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9503003",
    "kind": "arxiv",
    "version": 1
  }
}