Pith Number

pith:X6OAC4UH

pith:2008:X6OAC4UH3HM7KSBWJUXAW2LWQ5

not attested not anchored not stored refs pending

'Ultimate' Information Content in Solar and Stellar Spectra: Photospheric line asymmetries and wavelength shifts

Dainis Dravins (Lund Observatory)

arxiv:0810.2533 v1 · 2008-10-14 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{X6OAC4UH3HM7KSBWJUXAW2LWQ5}

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	2026-07-04T17:13:13.199299Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bf9c017287d9d9f548364d2e0b69768771fb3ca5d3c449e233b00238c46b2d8c

Aliases

arxiv: 0810.2533 · arxiv_version: 0810.2533v1 · doi: 10.48550/arxiv.0810.2533 · pith_short_12: X6OAC4UH3HM7 · pith_short_16: X6OAC4UH3HM7KSBW · pith_short_8: X6OAC4UH

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/X6OAC4UH3HM7KSBWJUXAW2LWQ5 \
  | 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: bf9c017287d9d9f548364d2e0b69768771fb3ca5d3c449e233b00238c46b2d8c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0060763e100e1c8c2beb27e7dcffb93bda68a720e6914261bd9abe6b2d48a145",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-10-14T20:00:04Z",
    "title_canon_sha256": "94b05e1c655987a2dbb9d4bd58f9c02ac7b9d9ebe02f33624c7c037c65817289"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0810.2533",
    "kind": "arxiv",
    "version": 1
  }
}