Pith Number

pith:ZN4QGPMM

pith:2009:ZN4QGPMMSHRXCWE7G4FQJBK4QY

not attested not anchored not stored refs pending

On the nature of red galaxies: the Chandra perspective

A. Comastri, A. Renzini, C. Vignali, D.M. Alexander, E. Daddi, L. Pozzetti, M.A. Campisi, M. Brusa, N. Arimoto, X. Kong

arxiv:0905.2193 v1 · 2009-05-13 · astro-ph.HE · 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{ZN4QGPMMSHRXCWE7G4FQJBK4QY}

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	2026-05-18T02:13:39.565096Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cb79033d8c91e371589f370b04855c8606f5ae8482b5acef9406076745febfc4

Aliases

arxiv: 0905.2193 · arxiv_version: 0905.2193v1 · doi: 10.48550/arxiv.0905.2193 · pith_short_12: ZN4QGPMMSHRX · pith_short_16: ZN4QGPMMSHRXCWE7 · pith_short_8: ZN4QGPMM

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/ZN4QGPMMSHRXCWE7G4FQJBK4QY \
  | 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: cb79033d8c91e371589f370b04855c8606f5ae8482b5acef9406076745febfc4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "011c0b9077f8139efdbb5925759122cd9fb3fac066921ea1d244b8f8f554ae9e",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-05-13T20:22:59Z",
    "title_canon_sha256": "54c4ed2eaf69b3f0f95473746e2207d1d6ea5f17a8427c041e225ee377537e3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.2193",
    "kind": "arxiv",
    "version": 1
  }
}