Pith Number

pith:QGPYV7U2

pith:2009:QGPYV7U2MF7OQMVTG33RG7ABYU

not attested not anchored not stored refs pending

The 2dF-SDSS LRG and QSO Survey: the QSO luminosity function at 0.4<z<2.6

(10) AAO), (2) Drexel, (3) Durham, (4) ATNF, (5) Princeton, (6) University of Illinois at Urbana-Champaign, (7) Portsmouth, (8) Queensland, 9), (9) Penn State, Adam D. Myers (6), Brian J. Boyle (4), David A. Wake (3) ((1)University of Sydney, Donald P. Schneider (9), Gordon T. Richards (2), Kevin A. Pimbblet (8), Michael A. Strauss (5), Nicholas P. Ross (3, Robert C. Nichol (7), Robert G. Sharp (10), Scott M. Croom (1), Tom Shanks (3)

arxiv:0907.2727 v1 · 2009-07-16 · 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{QGPYV7U2MF7OQMVTG33RG7ABYU}

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	2026-05-18T02:13:02.577659Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

819f8afe9a617ee832b336f7137c01c5203367f1abfb32382364d30a6695f50c

Aliases

arxiv: 0907.2727 · arxiv_version: 0907.2727v1 · doi: 10.48550/arxiv.0907.2727 · pith_short_12: QGPYV7U2MF7O · pith_short_16: QGPYV7U2MF7OQMVT · pith_short_8: QGPYV7U2

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/QGPYV7U2MF7OQMVTG33RG7ABYU \
  | 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: 819f8afe9a617ee832b336f7137c01c5203367f1abfb32382364d30a6695f50c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1161b4e65d4a4dfceb90080a8fcd624f342a7f0153b390be36e2bbd4474c3c0c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-16T01:37:50Z",
    "title_canon_sha256": "954dd56622a017f523ad2459c3e5a41b63c3505bf298ee2463b6d66fa804ff39"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.2727",
    "kind": "arxiv",
    "version": 1
  }
}