Pith Number

pith:LN74UPBU

pith:1998:LN74UPBUPZKKCAEEEERLSCUO3U

not attested not anchored not stored refs pending

ALFA: First Operational Experience of the MPE/MPIA Laser Guide Star System for Adaptive Optics

A. Eckart, A. Quirrenbach, H.-C. Holstenberg, M. Kasper, R. I. Davies, S. Rabien, T. Ott, W. Hackenberg

arxiv:astro-ph/9806351 v1 · 1998-06-26 · 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{LN74UPBUPZKKCAEEEERLSCUO3U}

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	2026-05-18T01:40:14.020907Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5b7fca3c347e54a100842122b90a8edd00028718389f07239fd1a995cec809eb

Aliases

arxiv: astro-ph/9806351 · arxiv_version: astro-ph/9806351v1 · doi: 10.48550/arxiv.astro-ph/9806351 · pith_short_12: LN74UPBUPZKK · pith_short_16: LN74UPBUPZKKCAEE · pith_short_8: LN74UPBU

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/LN74UPBUPZKKCAEEEERLSCUO3U \
  | 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: 5b7fca3c347e54a100842122b90a8edd00028718389f07239fd1a995cec809eb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15213b34ffb0cd5de1a5e49582379ef598592b64fa68ecfb75c905e03d579d37",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-06-26T08:23:29Z",
    "title_canon_sha256": "922d5df2cdc9ee6b7d70b41fc28ef1c9d70fd5782cf78f6e066e7670f91ae89a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9806351",
    "kind": "arxiv",
    "version": 1
  }
}