Pith Number

pith:XCQU2PDV

pith:2011:XCQU2PDVDOMEULMW4PUWCVSRCW

not attested not anchored not stored refs pending

A study of galaxies near low-redshift quasars

Beatriz Villarroel

arxiv:1107.2598 v1 · 2011-07-13 · 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{XCQU2PDVDOMEULMW4PUWCVSRCW}

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	2026-05-18T04:18:22.806203Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8a14d3c751b984a2d96e3e961565115a90d876f3f97f5716811b5ffc6bbaae0

Aliases

arxiv: 1107.2598 · arxiv_version: 1107.2598v1 · doi: 10.48550/arxiv.1107.2598 · pith_short_12: XCQU2PDVDOME · pith_short_16: XCQU2PDVDOMEULMW · pith_short_8: XCQU2PDV

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/XCQU2PDVDOMEULMW4PUWCVSRCW \
  | 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: b8a14d3c751b984a2d96e3e961565115a90d876f3f97f5716811b5ffc6bbaae0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "db8cca8b4c48df1887dc0bb4dff6b8c7b42c5582e3d45d8f07c2748e0af0ff38",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-07-13T16:57:38Z",
    "title_canon_sha256": "673a68888f6a30b704286564224fe1e41fd929e9d1c3112c34a98b4ea3634436"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.2598",
    "kind": "arxiv",
    "version": 1
  }
}