Pith Number

pith:4IURQMMR

pith:2015:4IURQMMR6YBPCEIWHKRMRYPLVC

not attested not anchored not stored refs pending

Variability in Proto-Planetary Nebulae: III. Light Curve Studies of Magellanic Cloud Carbon-Rich Objects

Bruce J. Hrivnak, Igor Soszy\'nski, Kevin Volk, Marcin Hajduk, Ryszard Szczerba, Wenxian Lu

arxiv:1503.08905 v1 · 2015-03-31 · 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{4IURQMMR6YBPCEIWHKRMRYPLVC}

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	2026-05-18T02:03:33.344159Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e229183191f602f111163aa2c8e1eba88d5804d518d97044f75da38188d4349d

Aliases

arxiv: 1503.08905 · arxiv_version: 1503.08905v1 · doi: 10.48550/arxiv.1503.08905 · pith_short_12: 4IURQMMR6YBP · pith_short_16: 4IURQMMR6YBPCEIW · pith_short_8: 4IURQMMR

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/4IURQMMR6YBPCEIWHKRMRYPLVC \
  | 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: e229183191f602f111163aa2c8e1eba88d5804d518d97044f75da38188d4349d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aaa1270af45a7d909e9a3446fa767b5b3f7417d625e7a7c38a33b18fbb263a1a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-03-31T04:24:46Z",
    "title_canon_sha256": "f89ad676e9606d0a18800ab63e026c04e6ff0c437cad86dae59de3b27ab4cbc7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.08905",
    "kind": "arxiv",
    "version": 1
  }
}