Pith Number

pith:N7NZYC6Z

pith:2009:N7NZYC6ZGA4BZAH6UVOOUDID4C

not attested not anchored not stored refs pending

Star formation and nuclear activity in close pairs of early-type galaxies

(2) MSSL-UCL, 3), (3) Oxford, (4) MPIA, (5) University of Hertfordshire), Anna Pasquali (4), Ben Rogers (1), Heidelberg, Ignacio Ferreras (2), Marc Sarzi (5) ((1) King's College London, Sugata Kaviraj (2

arxiv:0905.3386 v2 · 2009-05-20 · 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{N7NZYC6ZGA4BZAH6UVOOUDID4C}

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	2026-05-18T02:13:38.317634Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6fdb9c0bd930381c80fea55cea0d03e096ba543161119673dce94f15eed38470

Aliases

arxiv: 0905.3386 · arxiv_version: 0905.3386v2 · doi: 10.48550/arxiv.0905.3386 · pith_short_12: N7NZYC6ZGA4B · pith_short_16: N7NZYC6ZGA4BZAH6 · pith_short_8: N7NZYC6Z

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/N7NZYC6ZGA4BZAH6UVOOUDID4C \
  | 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: 6fdb9c0bd930381c80fea55cea0d03e096ba543161119673dce94f15eed38470

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "428157d2879742152c203e8065f36ec74350d4ec5cf0e99ad564a73264b4044b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-05-20T20:04:57Z",
    "title_canon_sha256": "7ea2fd6dd35246840691b7e6d3c1fae99d364a47970805b63a3dc15e95f020aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.3386",
    "kind": "arxiv",
    "version": 2
  }
}