Pith Number

pith:2XP25GNF

pith:2013:2XP25GNFY5DHWTLDF5PWXRJY4M

not attested not anchored not stored refs pending

Is GBT 1355+5439 a dark galaxy?

2), (2) Kapteyn Astronomical Institute, 3) ((1) Netherlands Institute for Radio Astronomy (ASTRON), (3) Astrophysics, Cosmology, Department of Astronomy, Dwingeloo, G.H. Heald (1), Gravity Centre (ACGC), South Africa), T.A. Oosterloo (1, The Netherlands, University of Cape Town, University of Groningen, W.J.G. de Blok (1

arxiv:1306.6148 v2 · 2013-06-26 · astro-ph.GA · 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{2XP25GNFY5DHWTLDF5PWXRJY4M}

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	2026-05-18T01:49:07.718170Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5dfae99a5c7467b4d632f5f6bc538e303231d6359858a94321470cdddb056c9

Aliases

arxiv: 1306.6148 · arxiv_version: 1306.6148v2 · doi: 10.48550/arxiv.1306.6148 · pith_short_12: 2XP25GNFY5DH · pith_short_16: 2XP25GNFY5DHWTLD · pith_short_8: 2XP25GNF

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/2XP25GNFY5DHWTLDF5PWXRJY4M \
  | 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: d5dfae99a5c7467b4d632f5f6bc538e303231d6359858a94321470cdddb056c9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0089ce4e1061cc8bab855546b018bc01e1a990091342177348e221e44a5d263",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-06-26T06:58:00Z",
    "title_canon_sha256": "9edaf33a933603e45902731da51f8b07d82ceb96f8d9ba54ceceae820746faf2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.6148",
    "kind": "arxiv",
    "version": 2
  }
}