Pith Number

pith:2IY36LGG

pith:2004:2IY36LGGLPMDPI6JKJIJNDY5RE

not attested not anchored not stored refs pending

Are QSO2 hiding among EROs?

dipartimento di astronomia universita' di Bologna), Marcella Brusa (INAF - Osservatorio Astronomico di Bologna

arxiv:astro-ph/0405416 v1 · 2004-05-21 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2IY36LGGLPMDPI6JKJIJNDY5RE}

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	2026-05-18T00:37:00.650882Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d231bf2cc65bd837a3c95250968f1d8938a95d447b2597a73253c22f88ca3fd2

Aliases

arxiv: astro-ph/0405416 · arxiv_version: astro-ph/0405416v1 · doi: 10.48550/arxiv.astro-ph/0405416 · pith_short_12: 2IY36LGGLPMD · pith_short_16: 2IY36LGGLPMDPI6J · pith_short_8: 2IY36LGG

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/2IY36LGGLPMDPI6JKJIJNDY5RE \
  | 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: d231bf2cc65bd837a3c95250968f1d8938a95d447b2597a73253c22f88ca3fd2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "058646bc56324cfbe355e3b2a853da77224200e244c692745cfa1bd7c87c0d82",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-05-21T08:36:05Z",
    "title_canon_sha256": "e3cd5dc88f912f0934a920d02c8529c9dcd86daa24a21d3184f3a0af51805b7e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0405416",
    "kind": "arxiv",
    "version": 1
  }
}