Pith Number

pith:FRQ775GI

pith:2018:FRQ775GITD7SNJHXSGGSAYXQKM

not attested not anchored not stored refs pending

Spatially resolved spectroscopy across stellar surfaces. III. Photospheric Fe I lines across HD189733A (K1 V)

Dainis Dravins, Hans-G\"unter Ludwig, Martin Gustavsson

arxiv:1806.00012 v1 · 2018-05-31 · astro-ph.SR · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FRQ775GITD7SNJHXSGGSAYXQKM}

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	2026-05-18T00:06:39.607901Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c61fff4c898ff26a4f7918d2062f0531b6aff113ddc5d8ab4beefda295b7fe0

Aliases

arxiv: 1806.00012 · arxiv_version: 1806.00012v1 · doi: 10.48550/arxiv.1806.00012 · pith_short_12: FRQ775GITD7S · pith_short_16: FRQ775GITD7SNJHX · pith_short_8: FRQ775GI

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/FRQ775GITD7SNJHXSGGSAYXQKM \
  | 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: 2c61fff4c898ff26a4f7918d2062f0531b6aff113ddc5d8ab4beefda295b7fe0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ba65ccbac5e5a0fbdb85ef50175f2e9ae022392038911ca7200f1b96cc60a63",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-05-31T18:00:01Z",
    "title_canon_sha256": "1dfca2fa16145cf8282dcad4f124741be2549a76aff3bb49372e546b986c8645"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.00012",
    "kind": "arxiv",
    "version": 1
  }
}