Pith Number

pith:PCHEI6UM

pith:1999:PCHEI6UMYCOX7G44RISCMPDT5N

not attested not anchored not stored refs pending

The zabs=zem Absorption Line Systems Toward QSO J2233-606 in the Hubble Deep Field South: NeVIII770,780 absorption and partial coverage

Patrick Petitjean (Institut d'Astrophysique de Paris), Pune), R. Srianand (IUCAA

arxiv:astro-ph/9902070 v1 · 1999-02-04 · 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{PCHEI6UMYCOX7G44RISCMPDT5N}

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	2026-05-18T04:21:32.440725Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

788e447a8cc09d7f9b9c8a24263c73eb4cc87e563b162d9232497abe960325b9

Aliases

arxiv: astro-ph/9902070 · arxiv_version: astro-ph/9902070v1 · doi: 10.48550/arxiv.astro-ph/9902070 · pith_short_12: PCHEI6UMYCOX · pith_short_16: PCHEI6UMYCOX7G44 · pith_short_8: PCHEI6UM

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/PCHEI6UMYCOX7G44RISCMPDT5N \
  | 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: 788e447a8cc09d7f9b9c8a24263c73eb4cc87e563b162d9232497abe960325b9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0bad574abd77de095e988c335ee7404f00a43d0f54f18c8276a5fef927fa2f4f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-02-04T14:33:53Z",
    "title_canon_sha256": "1fd5fc51f9e9502ce00e3c3fade323c1cd2b1adfdf474d24c3cc8e9a1498167e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9902070",
    "kind": "arxiv",
    "version": 1
  }
}