Pith Number

pith:2HXLD37X

pith:2001:2HXLD37XDJYYJZ6J7RHREH532M

not attested not anchored not stored refs pending

VLT optical observations of V821 Ara(=GX339-4) in an extended "off" state

P.A. Charles (Southampton), R. Fender (Amsterdam), T. Shahbaz (IAC)

arxiv:astro-ph/0107455 v1 · 2001-07-24 · 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{2HXLD37XDJYYJZ6J7RHREH532M}

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	2026-05-18T01:07:45.623975Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1eeb1eff71a7184e7c9fc4f121fbbd309b7c190c16f73ad67e839375f80bcca

Aliases

arxiv: astro-ph/0107455 · arxiv_version: astro-ph/0107455v1 · doi: 10.48550/arxiv.astro-ph/0107455 · pith_short_12: 2HXLD37XDJYY · pith_short_16: 2HXLD37XDJYYJZ6J · pith_short_8: 2HXLD37X

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/2HXLD37XDJYYJZ6J7RHREH532M \
  | 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: d1eeb1eff71a7184e7c9fc4f121fbbd309b7c190c16f73ad67e839375f80bcca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c2d7a51de37274f4fda6426855a6c8e828f7061fe182190b33b1f4bf4fc1e34e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-07-24T11:33:33Z",
    "title_canon_sha256": "d175be05afc9c2b71e8d3afb06e2b35d34cbb6c4f6f2e7589e739d3b9fee122e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0107455",
    "kind": "arxiv",
    "version": 1
  }
}