Pith Number

pith:3BUPJ7MI

pith:2017:3BUPJ7MIPRZSHEJWZLWBL5J5IG

not attested not anchored not stored refs pending

The X-ray Pulsar 2A 1822-371 as a Super Eddington source

2), (2) Astron), A. Bak Nielsen (1), A. Patruno (1, C. D'Angelo (1) ((1) Leiden Observatory

arxiv:1702.07524 v1 · 2017-02-24 · 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{3BUPJ7MIPRZSHEJWZLWBL5J5IG}

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	2026-05-18T00:46:37.250376Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d868f4fd887c73239136caec15f53d41a8b62ab536163b7b8af316d1154ec052

Aliases

arxiv: 1702.07524 · arxiv_version: 1702.07524v1 · doi: 10.48550/arxiv.1702.07524 · pith_short_12: 3BUPJ7MIPRZS · pith_short_16: 3BUPJ7MIPRZSHEJW · pith_short_8: 3BUPJ7MI

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/3BUPJ7MIPRZSHEJWZLWBL5J5IG \
  | 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: d868f4fd887c73239136caec15f53d41a8b62ab536163b7b8af316d1154ec052

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8fea7d2320ebe9d342c068bef3b98b772e844ca44976fff8b9a04eb2c44747df",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2017-02-24T10:21:41Z",
    "title_canon_sha256": "fcc5ef97307ea933c980ae8ce928c04deecbdd486b883527ac87608133515439"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.07524",
    "kind": "arxiv",
    "version": 1
  }
}