Pith Number

pith:TJC66NHG

pith:2025:TJC66NHG2D5VO2VE7LIAMNYLVW

not attested not anchored not stored refs pending

Two decades of optical variability of Small Magellanic Cloud high-mass X-ray binaries

Andrzej Udalski, Charles Bailyn, Frank Haberl, Georgios Vasilopoulos, Helena Treiber

arxiv:2501.13147 v1 · 2025-01-22 · astro-ph.HE · astro-ph.GA · 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{TJC66NHG2D5VO2VE7LIAMNYLVW}

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	2026-07-05T10:04:24.163124Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9a45ef34e6d0fb576aa4fad006370bad864451445c6bf6d75015bb838c566ea8

Aliases

arxiv: 2501.13147 · arxiv_version: 2501.13147v1 · doi: 10.48550/arxiv.2501.13147 · pith_short_12: TJC66NHG2D5V · pith_short_16: TJC66NHG2D5VO2VE · pith_short_8: TJC66NHG

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/TJC66NHG2D5VO2VE7LIAMNYLVW \
  | 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: 9a45ef34e6d0fb576aa4fad006370bad864451445c6bf6d75015bb838c566ea8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f3b9664cc178d5015afdf3d1bda2128d4beb0e69c1960bdcbcd79fdb58443684",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.SR"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2025-01-22T19:00:00Z",
    "title_canon_sha256": "a384f117b8f69522862e162368caa6f1a3cd39f1e6662eed877d43ebfbe49fb6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.13147",
    "kind": "arxiv",
    "version": 1
  }
}