Pith Number

pith:KKLWMRCT

pith:2012:KKLWMRCTUYKMYMND2JQA7NG6AF

not attested not anchored not stored refs pending

The Surprising Absence of Absorption in the Far-Ultraviolet Spectrum of Mrk 231

D. Lutz, D. S. N. Rupke, E. Sturm, F. Hamann, H. Krug, H. Netzer, K. R. Sembach, L. Tacconi, M. Trippe, R. Genzel, R. Maiolino, S. H. Teng, S. Veilleux, T. M. Tripp

arxiv:1212.2401 v1 · 2012-12-11 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KKLWMRCTUYKMYMND2JQA7NG6AF}

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	2026-05-18T01:52:40.117642Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5297664453a614cc31a3d2600fb4de014e6468d98d389b8921101f0d76a2ff62

Aliases

arxiv: 1212.2401 · arxiv_version: 1212.2401v1 · doi: 10.48550/arxiv.1212.2401 · pith_short_12: KKLWMRCTUYKM · pith_short_16: KKLWMRCTUYKMYMND · pith_short_8: KKLWMRCT

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/KKLWMRCTUYKMYMND2JQA7NG6AF \
  | 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: 5297664453a614cc31a3d2600fb4de014e6468d98d389b8921101f0d76a2ff62

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a6f8a2c59b81159d80d65cd95ceeeadee8db2587bccf33fc7816ca9fc3bf35f6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-12-11T12:42:27Z",
    "title_canon_sha256": "d0b1f1ffc5060672688a65505df89b99cb0daeb341c8af85aaed8adfe3be2a43"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.2401",
    "kind": "arxiv",
    "version": 1
  }
}