Pith Number

pith:KW63YC27

pith:2019:KW63YC27ZNWLFYAHUY6ZFZIJDX

not attested not anchored not stored refs pending

The space density of z>4 blazars

Adriana Gargiulo, Alberto Moretti, Alessandro Caccianiga, Claudia Cicone, Daniele Dallacasa, Luca Ighina, Lucia Ballo, Maria J. March\~a, Paola Severgnini, Roberto Della Ceca, Silvia Belladitta, Sonia Ant\'on

arxiv:1901.02910 v1 · 2019-01-09 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KW63YC27ZNWLFYAHUY6ZFZIJDX}

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	2026-05-17T23:56:36.072635Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55bdbc0b5fcb6cb2e007a63d92e5091dc3b15076654254b93ceb803f9e430ef2

Aliases

arxiv: 1901.02910 · arxiv_version: 1901.02910v1 · doi: 10.48550/arxiv.1901.02910 · pith_short_12: KW63YC27ZNWL · pith_short_16: KW63YC27ZNWLFYAH · pith_short_8: KW63YC27

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/KW63YC27ZNWLFYAHUY6ZFZIJDX \
  | 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: 55bdbc0b5fcb6cb2e007a63d92e5091dc3b15076654254b93ceb803f9e430ef2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b1b954287908c44532292aaf4683c13ffd13c54699db10de13992d2012fe102",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-01-09T19:26:49Z",
    "title_canon_sha256": "be5103b23d8ce5d06762d79608be0a79b4f89b0c1bbc517ae9563d5315e2d3cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.02910",
    "kind": "arxiv",
    "version": 1
  }
}