Pith Number

pith:LDIU5FUN

pith:2021:LDIU5FUNHXWR26OD2PGIBXPUNB

not attested not anchored not stored refs pending

A hyperluminous obscured quasar at a redshift of z ~ 4.3

Andreas Efstathiou, Denis Burgarella, Duncan Farrah, Katarzyna Malek, Kenneth J. Duncan, Maria Del Carmen Campos Varillas, Peter Hurley, Raphael Shirley, Seb Oliver, Steven Duivenvoorden, Veronique Buat, Vicky Papadopoulou Lesta

arxiv:2103.08032 v2 · 2021-03-14 · 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{LDIU5FUNHXWR26OD2PGIBXPUNB}

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	2026-07-05T04:12:34.462295Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

58d14e968d3ded1d79c3d3cc80ddf4685b7fa57f83c0400a3b0eb77da022cdce

Aliases

arxiv: 2103.08032 · arxiv_version: 2103.08032v2 · doi: 10.48550/arxiv.2103.08032 · pith_short_12: LDIU5FUNHXWR · pith_short_16: LDIU5FUNHXWR26OD · pith_short_8: LDIU5FUN

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/LDIU5FUNHXWR26OD2PGIBXPUNB \
  | 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: 58d14e968d3ded1d79c3d3cc80ddf4685b7fa57f83c0400a3b0eb77da022cdce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5fb70225904ab4f5c95828bffde5dd32897bcbd0c6065d2b5a05c97a957d725",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-03-14T20:45:03Z",
    "title_canon_sha256": "c52f39c03b6ec627f1ad1e49d7702bf41605c66956be39afa9c7057993679f0e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.08032",
    "kind": "arxiv",
    "version": 2
  }
}