Pith Number

pith:IBI3QJUR

pith:2018:IBI3QJURB5R3O6UBF2GF626SL5

not attested not anchored not stored refs pending

The solar-like "Second Spectrum" and the polarised metal lines in emission of the post-AGB binary 89 Herculis

A. Ghedina, C. Scalia, F. Leone, M. Cecconi, M. Gangi, M. Giarrusso, M. Munari, R. Cosentino, S. Scuderi

arxiv:1804.08255 v1 · 2018-04-23 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IBI3QJURB5R3O6UBF2GF626SL5}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T00:02:35.145908Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4051b826910f63b77a812e8c5f6bd25f5c6596dacad9f9b054a8e5949472d761

Aliases

arxiv: 1804.08255 · arxiv_version: 1804.08255v1 · doi: 10.48550/arxiv.1804.08255 · pith_short_12: IBI3QJURB5R3 · pith_short_16: IBI3QJURB5R3O6UB · pith_short_8: IBI3QJUR

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/IBI3QJURB5R3O6UBF2GF626SL5 \
  | 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: 4051b826910f63b77a812e8c5f6bd25f5c6596dacad9f9b054a8e5949472d761

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dcdf9b6af1b762ceea805fcbe51dbd6eea5a19a69f719eec6bbb44b5e01db1cd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-04-23T06:32:31Z",
    "title_canon_sha256": "2c6b1ef08e88cb0fcbeb67d846ddd2a09965480ffca315d033bf7f4ca4d5ef59"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.08255",
    "kind": "arxiv",
    "version": 1
  }
}