Pith Number

pith:DIBNQDQT

pith:2020:DIBNQDQTRZBXPHAMBLHNP5ANBW

not attested not anchored not stored refs pending

The first blazar observed at z>6

A. Caccianiga, A. Moretti, C. Cicone, C. Spingola, D. Dallacasa, G. Ghisellini, L. P. Cassar\`a, M. Pedani, P. Severgnini, R. Della Ceca, S. Belladitta, T. Sbarrato

arxiv:2002.05178 v2 · 2020-02-12 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DIBNQDQTRZBXPHAMBLHNP5ANBW}

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	2026-07-05T00:47:00.070151Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a02d80e138e43779c0c0aced7f40d0d8cb2db7ce1350030c025f4f4770bf22d

Aliases

arxiv: 2002.05178 · arxiv_version: 2002.05178v2 · doi: 10.48550/arxiv.2002.05178 · pith_short_12: DIBNQDQTRZBX · pith_short_16: DIBNQDQTRZBXPHAM · pith_short_8: DIBNQDQT

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/DIBNQDQTRZBXPHAMBLHNP5ANBW \
  | 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: 1a02d80e138e43779c0c0aced7f40d0d8cb2db7ce1350030c025f4f4770bf22d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5497b188091fa40e138263bfe22569b29a844ed298348284763678e27b8794ee",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2020-02-12T19:04:02Z",
    "title_canon_sha256": "0dad21d3ce7d9dedf3dece8ffec9120ed1a9c63fc9de106ef545361391143275"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.05178",
    "kind": "arxiv",
    "version": 2
  }
}