Pith Number

pith:L5ETFXTB

pith:2009:L5ETFXTBMCLIJMPTOCSHIJOSQF

not attested not anchored not stored refs pending

SDSS J094533.99+100950.1 - the remarkable weak emission line quasar

2), (2) N.Copernicus Astronomical Center, (3) Harvard-Smithsonian CfA, Bozena Czerny (2), Joanna Kuraszkiewicz (3) ((1) Faculty of Physics, Krzysztof Hryniewicz (1, Marek Nikolajuk (1), Poland, Univ. of Bialystok, USA)

arxiv:0904.3517 v2 · 2009-04-22 · astro-ph.GA · 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{L5ETFXTBMCLIJMPTOCSHIJOSQF}

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	2026-05-18T02:13:57.994498Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f4932de61609684b1f370a47425d2815ac01f0c297eeee07a4b28c481106da7

Aliases

arxiv: 0904.3517 · arxiv_version: 0904.3517v2 · doi: 10.48550/arxiv.0904.3517 · pith_short_12: L5ETFXTBMCLI · pith_short_16: L5ETFXTBMCLIJMPT · pith_short_8: L5ETFXTB

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/L5ETFXTBMCLIJMPTOCSHIJOSQF \
  | 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: 5f4932de61609684b1f370a47425d2815ac01f0c297eeee07a4b28c481106da7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a79b7292a0dcf3d5c79c1cf6c643c417452996563ce20fa4977c36a2b401f931",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-04-22T18:12:21Z",
    "title_canon_sha256": "8765ae8c6d802f927e80f8e751c46398df7b7adeb72ca1afede01c99db25fa78"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.3517",
    "kind": "arxiv",
    "version": 2
  }
}