Pith Number

pith:QPKVO72J

pith:2013:QPKVO72JLE6UPUMBTMGQUTSK3B

not attested not anchored not stored refs pending

Photometric redshifts for Quasars in multi band Surveys

A. Mercurio, G. Longo, M. Brescia, R. d'Abrusco, S. Cavuoti

arxiv:1305.5641 v1 · 2013-05-24 · astro-ph.IM · 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{QPKVO72JLE6UPUMBTMGQUTSK3B}

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	2026-05-18T01:49:47.011727Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83d5577f49593d47d1819b0d0a4e4ad86f999ffe583b1563381bc08d860d7c98

Aliases

arxiv: 1305.5641 · arxiv_version: 1305.5641v1 · doi: 10.48550/arxiv.1305.5641 · pith_short_12: QPKVO72JLE6U · pith_short_16: QPKVO72JLE6UPUMB · pith_short_8: QPKVO72J

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/QPKVO72JLE6UPUMBTMGQUTSK3B \
  | 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: 83d5577f49593d47d1819b0d0a4e4ad86f999ffe583b1563381bc08d860d7c98

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1e03b6080df03d42bffc4424548efa2b418ca2732606181615024ee6406e6288",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2013-05-24T07:40:49Z",
    "title_canon_sha256": "51cc245ad256e28ab56eea29647787bf74ee660db8f3e4c873832af9a1cd9e1f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.5641",
    "kind": "arxiv",
    "version": 1
  }
}