Pith Number

pith:PCOM5IG2

pith:2001:PCOM5IG277FNCHZO3NUXPJL6C7

not attested not anchored not stored refs pending

Line ratios for Helium-like ions: Applications to collision-dominated plasmas

A.J.J. Raassen, D. Porquet, J. Dubau, J.S. Kaastra, R. Mewe

arxiv:astro-ph/0107329 v1 · 2001-07-18 · 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{PCOM5IG277FNCHZO3NUXPJL6C7}

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	2026-05-18T01:07:45.642474Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

789ccea0daffcad11f2edb6977a57e17c65f2581775ea7f1ba58c41de0aba39f

Aliases

arxiv: astro-ph/0107329 · arxiv_version: astro-ph/0107329v1 · doi: 10.48550/arxiv.astro-ph/0107329 · pith_short_12: PCOM5IG277FN · pith_short_16: PCOM5IG277FNCHZO · pith_short_8: PCOM5IG2

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/PCOM5IG277FNCHZO3NUXPJL6C7 \
  | 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: 789ccea0daffcad11f2edb6977a57e17c65f2581775ea7f1ba58c41de0aba39f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5fbd8922b4f953a23475c301f087160d137a045f762eed4216a6e19342883ce1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-07-18T07:24:34Z",
    "title_canon_sha256": "f87faa33aa6d071455dc7a7ae90411f27ec158e834d79d4d314e763fb3de1dbb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0107329",
    "kind": "arxiv",
    "version": 1
  }
}