Pith Number

pith:FJ6CQ45N

pith:2023:FJ6CQ45NPRTGY6U7SASUM75HCE

not attested not anchored not stored refs pending

Revised ephemeris and orbital period derivative of the supersoft X-ray source CAL 87 based on 34 years of observations

A. S. Oliveira, F. D'Amico, F. Jablonski, M. P. Diaz, N. Palivanas, P. E. Stecchini, R. K. Saito

arxiv:2311.15407 v1 · 2023-11-26 · astro-ph.HE · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FJ6CQ45NPRTGY6U7SASUM75HCE}

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	2026-07-05T07:17:03.381753Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2a7c2873ad7c666c7a9f9025467fa71112bf1067730c5f8d934f98773135d7da

Aliases

arxiv: 2311.15407 · arxiv_version: 2311.15407v1 · doi: 10.48550/arxiv.2311.15407 · pith_short_12: FJ6CQ45NPRTG · pith_short_16: FJ6CQ45NPRTGY6U7 · pith_short_8: FJ6CQ45N

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/FJ6CQ45NPRTGY6U7SASUM75HCE \
  | 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: 2a7c2873ad7c666c7a9f9025467fa71112bf1067730c5f8d934f98773135d7da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dbcd02f500f7e6c338ebe8c27f0cad145bc2dbaa91dca82416f8f89bb55dc5c3",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2023-11-26T20:07:03Z",
    "title_canon_sha256": "e9f9ba2d617e508e95b13ba1d12f5d8a323ea6ebafb64c1f4d82b3a726f937dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2311.15407",
    "kind": "arxiv",
    "version": 1
  }
}