Pith Number

pith:JLTS4OLS

pith:1997:JLTS4OLSEZTWMHL76IUK4XMNKS

not attested not anchored not stored refs pending

Keck Spectroscopy of the Gravitational Lens System PG 1115+080: Redshifts of the Lensing Galaxies

Judith G. Cohen, Lori M. Lubin (OCIW), Roger D. Blandford (Caltech), Tomislav Kundic

arxiv:astro-ph/9704109 v2 · 1997-04-12 · 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{JLTS4OLSEZTWMHL76IUK4XMNKS}

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	2026-07-04T16:02:57.717769Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ae72e39722667661d7ff228ae5d8d548f966010679d9b81cf8eb2054668e312

Aliases

arxiv: astro-ph/9704109 · arxiv_version: astro-ph/9704109v2 · doi: 10.48550/arxiv.astro-ph/9704109 · pith_short_12: JLTS4OLSEZTW · pith_short_16: JLTS4OLSEZTWMHL7 · pith_short_8: JLTS4OLS

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/JLTS4OLSEZTWMHL76IUK4XMNKS \
  | 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: 4ae72e39722667661d7ff228ae5d8d548f966010679d9b81cf8eb2054668e312

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ccb098b2b314d0cc4a4fd91319fde65bed44a5c0e4011fd2aea6726975bbe102",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-04-12T01:21:50Z",
    "title_canon_sha256": "d61e11a34ce15770b168d4cab5c7cafe8d15fcc669f1725030472e58a34ca070"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9704109",
    "kind": "arxiv",
    "version": 2
  }
}