Pith Number

pith:OTL6XREY

pith:2025:OTL6XREYEABONU3MR72MM6RIC6

not attested not anchored not stored refs pending

On variability of DDO68-V1, a unique extremely metal-poor LBV

S.A. Pustilnik, Y.A. Perepelitsyna

arxiv:2501.16810 v1 · 2025-01-28 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OTL6XREYEABONU3MR72MM6RIC6}

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	2026-07-05T10:24:00.154363Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74d7ebc4982002e6d36c8ff4c67a28179dc6763972f063049e5d76095af92e5a

Aliases

arxiv: 2501.16810 · arxiv_version: 2501.16810v1 · doi: 10.48550/arxiv.2501.16810 · pith_short_12: OTL6XREYEABO · pith_short_16: OTL6XREYEABONU3M · pith_short_8: OTL6XREY

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/OTL6XREYEABONU3MR72MM6RIC6 \
  | 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: 74d7ebc4982002e6d36c8ff4c67a28179dc6763972f063049e5d76095af92e5a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7ff422b76f13d883bed3eac558654e84fba2045b43bc20c51643e0a5aeefad2",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2025-01-28T09:25:49Z",
    "title_canon_sha256": "4677251e3b2fe6befa18aed61e22f259d62c3895916bd56a5f4c711cb4bb5963"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.16810",
    "kind": "arxiv",
    "version": 1
  }
}