Pith Number

pith:3JZX52DQ

pith:1996:3JZX52DQHJJ5M4HKWBNU2DCHRA

not attested not anchored not stored refs pending

A Composite HST Spectrum of Quasars

A. F. Davidsen (Johns Hopkins University), G. A. Kriss, J. P. Grimes, R. C. Telfer, W. Zheng

arxiv:astro-ph/9608198 v1 · 1996-08-29 · 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{3JZX52DQHJJ5M4HKWBNU2DCHRA}

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	2026-07-04T16:00:14.165311Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

da737ee8703a53d670eab05b4d0c47883fd21c132690f1af79ce10550a872c6b

Aliases

arxiv: astro-ph/9608198 · arxiv_version: astro-ph/9608198v1 · doi: 10.48550/arxiv.astro-ph/9608198 · pith_short_12: 3JZX52DQHJJ5 · pith_short_16: 3JZX52DQHJJ5M4HK · pith_short_8: 3JZX52DQ

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/3JZX52DQHJJ5M4HKWBNU2DCHRA \
  | 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: da737ee8703a53d670eab05b4d0c47883fd21c132690f1af79ce10550a872c6b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5ca1bcd4cb72f04ebd8ef31261403ec3d699f3aa0f290262b4c3b8181cc066c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1996-08-29T19:33:24Z",
    "title_canon_sha256": "a413dba6f168ee5d9f51bb000fb456c6c29992474979b08c9c816b63725d206f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9608198",
    "kind": "arxiv",
    "version": 1
  }
}