Pith Number

pith:LNQD6S4O

pith:2014:LNQD6S4OAMRJY7H3J5IUKAQ3QM

not attested not anchored not stored refs pending

The Puzzling Negative Orbit-Period Derivative of the Low-Mass X-Ray Binary 4U 1820-30 in NGC 6624

Andreas H.W. Kuepper (Columbia), Michael Brockamp (Bonn), Miklos Peuten (Bonn), Pavel Kroupa (Bonn)

arxiv:1409.4767 v2 · 2014-09-16 · astro-ph.SR · 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{LNQD6S4OAMRJY7H3J5IUKAQ3QM}

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	2026-05-18T02:30:46.971712Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5b603f4b8e03229c7cfb4f5145021b833eb77eb215a5dbd7cd5fef10d49b0fe0

Aliases

arxiv: 1409.4767 · arxiv_version: 1409.4767v2 · doi: 10.48550/arxiv.1409.4767 · pith_short_12: LNQD6S4OAMRJ · pith_short_16: LNQD6S4OAMRJY7H3 · pith_short_8: LNQD6S4O

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/LNQD6S4OAMRJY7H3J5IUKAQ3QM \
  | 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: 5b603f4b8e03229c7cfb4f5145021b833eb77eb215a5dbd7cd5fef10d49b0fe0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a3ee8af0b79f4507326803c25dab68e70c6cc7e38ad58786ccbf4c4de9c51e5f",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2014-09-16T20:00:06Z",
    "title_canon_sha256": "9d841b7740a5ddf182c73be0da7155ec061fc05b378b600cebc0df292ca309e1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.4767",
    "kind": "arxiv",
    "version": 2
  }
}