Pith Number

pith:NWRJGFQI

pith:2016:NWRJGFQIWM6SBVV2SCDI6VEPL6

not attested not anchored not stored refs pending

The unbearable opaqueness of Arp 220

C. Henkel, E. Gonz\'alez-Alfonso, F. Costagliola, J. Mart\'in-Pintado, K. Sakamoto, M. Krips, N. Harada, P. van der Werf, R. Aladro, S. Aalto, S. Garc\'ia-Burillo, S. Mart\'in, S. M\"uhle, S. Muller, S. Viti

arxiv:1603.01291 v1 · 2016-03-03 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NWRJGFQIWM6SBVV2SCDI6VEPL6}

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	2026-05-18T01:15:42.018976Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6da2931608b33d20d6ba90868f548f5f88eda30b73ec6a567315f9f8306fd5da

Aliases

arxiv: 1603.01291 · arxiv_version: 1603.01291v1 · doi: 10.48550/arxiv.1603.01291 · pith_short_12: NWRJGFQIWM6S · pith_short_16: NWRJGFQIWM6SBVV2 · pith_short_8: NWRJGFQI

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/NWRJGFQIWM6SBVV2SCDI6VEPL6 \
  | 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: 6da2931608b33d20d6ba90868f548f5f88eda30b73ec6a567315f9f8306fd5da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5448a00acd5c30114e5d90afbbf2bc58195475e825f9929f3d3c7378fe6207ad",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-03-03T21:44:54Z",
    "title_canon_sha256": "1fa37b4dbfa8aa4a7a6f097b33e2c2192c65eb724aa78760e092d6bfa0bdda52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.01291",
    "kind": "arxiv",
    "version": 1
  }
}