Pith Number

pith:DTBBV7UA

pith:2015:DTBBV7UA7T7KYAMHCXO4QDGN4Q

not attested not anchored not stored refs pending

Kathryns Wheel: A spectacular galaxy collision discovered in the Galactic neighbourhood

Albert A. Zijlstra, David J. Frew, George Bendo, Ivan Bojicic, Michelle Cluver, Milorad Stupar, Quentin A. Parker

arxiv:1508.03620 v1 · 2015-08-14 · 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{DTBBV7UA7T7KYAMHCXO4QDGN4Q}

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	2026-05-18T01:34:47.462862Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1cc21afe80fcfeac018715ddc80ccde42033bfd6f22ee8cfc2f8e18c06d929f7

Aliases

arxiv: 1508.03620 · arxiv_version: 1508.03620v1 · doi: 10.48550/arxiv.1508.03620 · pith_short_12: DTBBV7UA7T7K · pith_short_16: DTBBV7UA7T7KYAMH · pith_short_8: DTBBV7UA

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/DTBBV7UA7T7KYAMHCXO4QDGN4Q \
  | 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: 1cc21afe80fcfeac018715ddc80ccde42033bfd6f22ee8cfc2f8e18c06d929f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ba0db7edd04549ac9c374398e6ed940f672a4f438d099488837cc209e8ec203",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-08-14T19:50:16Z",
    "title_canon_sha256": "f164b31641f1881dcb0743ac26a45eb1c0b8a265de2c06fbb8e28c6bb1daa170"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.03620",
    "kind": "arxiv",
    "version": 1
  }
}