Pith Number

pith:U4MZMLQY

pith:2020:U4MZMLQYI5GIJTWQYXNPAGDVGI

not attested not anchored not stored refs pending

ZBLLAC -- A spectroscopic database of BL Lacertae objects

A. Treves, M. Landoni, R. Falomo, S. Paiano

arxiv:2009.03439 v1 · 2020-09-03 · astro-ph.HE · 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{U4MZMLQYI5GIJTWQYXNPAGDVGI}

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	2026-07-05T01:44:19.844199Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a719962e18474c84ced0c5daf01875320d96ee0110863539256d3068880d9f38

Aliases

arxiv: 2009.03439 · arxiv_version: 2009.03439v1 · doi: 10.48550/arxiv.2009.03439 · pith_short_12: U4MZMLQYI5GI · pith_short_16: U4MZMLQYI5GIJTWQ · pith_short_8: U4MZMLQY

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/U4MZMLQYI5GIJTWQYXNPAGDVGI \
  | 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: a719962e18474c84ced0c5daf01875320d96ee0110863539256d3068880d9f38

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2719d743554d6c22d9b682981b39c0d9a4863d2a7032c8cac92cd15d0c514835",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2020-09-03T14:03:00Z",
    "title_canon_sha256": "81326bbe089ad81b7a26af623433bccdfc35050260112ba7583ef0172de6e18c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2009.03439",
    "kind": "arxiv",
    "version": 1
  }
}