Pith Number

pith:7L5YPHIH

pith:1998:7L5YPHIHQ2SGCPSHUTGQTZV7LQ

not attested not anchored not stored refs pending

New Near-Infrared Spectroscopy of the High Redshift Quasar B 1422+231 at z=3.62

A. S. Evans, D. B. Sanders, K. Kawara, K.-W. Hodapp, N. Arimoto, T. Murayama, Y. Taniguchi

arxiv:astro-ph/9812380 v1 · 1998-12-21 · 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{7L5YPHIHQ2SGCPSHUTGQTZV7LQ}

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	2026-07-04T16:07:23.431598Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fafb879d0786a4613e47a4cd09e6bf5c2e96733b2c3f952e66a3e91d640c20f1

Aliases

arxiv: astro-ph/9812380 · arxiv_version: astro-ph/9812380v1 · doi: 10.48550/arxiv.astro-ph/9812380 · pith_short_12: 7L5YPHIHQ2SG · pith_short_16: 7L5YPHIHQ2SGCPSH · pith_short_8: 7L5YPHIH

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/7L5YPHIHQ2SGCPSHUTGQTZV7LQ \
  | 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: fafb879d0786a4613e47a4cd09e6bf5c2e96733b2c3f952e66a3e91d640c20f1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6cb1be090dd3a39f4ad2eedc5f23488ba032ceae15567439b77bc2f0f3d2ae14",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-12-21T09:38:07Z",
    "title_canon_sha256": "c51ef08df10658e9b90d79fd16d753adb26faaca3eac5519f22d1ee444e8ea32"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9812380",
    "kind": "arxiv",
    "version": 1
  }
}