Pith Number

pith:SZ57OLNZ

pith:2009:SZ57OLNZM7CXN7NB7BVUV2KDGC

not attested not anchored not stored refs pending

Host Galaxies of Luminous Type 2 Quasars at z ~ 0.5

Jenny E. Greene, Julian H. Krolik, Michael A. Strauss, Nadia L. Zakamska, Timothy M. Heckman, Xin Liu

arxiv:0907.3491 v1 · 2009-07-21 · 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{SZ57OLNZM7CXN7NB7BVUV2KDGC}

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	2026-05-18T02:12:55.348889Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

967bf72db967c576fda1f86b4ae94330a51ab0141ecd3e0eef25b9c48254bf2b

Aliases

arxiv: 0907.3491 · arxiv_version: 0907.3491v1 · doi: 10.48550/arxiv.0907.3491 · pith_short_12: SZ57OLNZM7CX · pith_short_16: SZ57OLNZM7CXN7NB · pith_short_8: SZ57OLNZ

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/SZ57OLNZM7CXN7NB7BVUV2KDGC \
  | 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: 967bf72db967c576fda1f86b4ae94330a51ab0141ecd3e0eef25b9c48254bf2b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a207a0bbaad75d343fc86fabcbcc89b234cc34f76fbbbfe17887f5199c3acb9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-21T02:05:12Z",
    "title_canon_sha256": "0964734cf444631e507ebad3d2cdd2e362505905983902a000f933e773e79e6c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3491",
    "kind": "arxiv",
    "version": 1
  }
}