Pith Number

pith:4DUU6T2O

pith:2015:4DUU6T2OLPH22CF4Y3HBAYQNTB

not attested not anchored not stored refs pending

Missing hard states and regular outbursts: the puzzling case of the black hole candidate 4U 1630-472

C. Ferrigno, F. Capitanio, G. De Cesare, R. Campana

arxiv:1505.04034 v1 · 2015-05-15 · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4DUU6T2OLPH22CF4Y3HBAYQNTB}

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	2026-05-18T01:19:48.527401Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0e94f4f4e5bcfad08bcc6ce10620d984341617e140b4953d6d2384fce55a830

Aliases

arxiv: 1505.04034 · arxiv_version: 1505.04034v1 · doi: 10.48550/arxiv.1505.04034 · pith_short_12: 4DUU6T2OLPH2 · pith_short_16: 4DUU6T2OLPH22CF4 · pith_short_8: 4DUU6T2O

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/4DUU6T2OLPH22CF4Y3HBAYQNTB \
  | 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: e0e94f4f4e5bcfad08bcc6ce10620d984341617e140b4953d6d2384fce55a830

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ce11edb09ecbaafbd5bb4270dd793329e5c1f7dfeaa12d7c76973f6701daf41",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2015-05-15T11:28:12Z",
    "title_canon_sha256": "6705b87d1a4eadc0fa80563f6c6420f0fb1b3134cf7675be40f944e9b615f0ad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.04034",
    "kind": "arxiv",
    "version": 1
  }
}