Pith Number

pith:UPDX35VO

pith:2010:UPDX35VOTVEDFPZJE44IOFZKGS

not attested not anchored not stored refs pending

The H-alpha Variations of eta Carinae During the 2009.0 Spectroscopic Event

A. T. Okazaki, D. R. Gies, E. Fernandez-Lajus, N. D. Richardson, T. J. Henry

arxiv:1001.3414 v1 · 2010-01-19 · 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{UPDX35VOTVEDFPZJE44IOFZKGS}

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	2026-05-18T02:09:32.316230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3c77df6ae9d4832bf29273887172a34846c169bfc838fd2f96b5a2504192ace

Aliases

arxiv: 1001.3414 · arxiv_version: 1001.3414v1 · doi: 10.48550/arxiv.1001.3414 · pith_short_12: UPDX35VOTVED · pith_short_16: UPDX35VOTVEDFPZJ · pith_short_8: UPDX35VO

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/UPDX35VOTVEDFPZJE44IOFZKGS \
  | 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: a3c77df6ae9d4832bf29273887172a34846c169bfc838fd2f96b5a2504192ace

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "945c56efc4c3625f9e2496d6f870c63438c841c6f33445bcc5a87fc5799d8a1c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-01-19T21:41:28Z",
    "title_canon_sha256": "8d760a718a4b7b873e5da672ab906e2cea5701ce41003b28910a991cf7bd2ecc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.3414",
    "kind": "arxiv",
    "version": 1
  }
}