Pith Number

pith:2ZVF2NAC

pith:2019:2ZVF2NACIQWEWDU2OKSTWAIKAE

not attested not anchored not stored refs pending

A new hard X-ray selected sample of extreme high-energy peaked BL Lac objects and their TeV gamma-ray properties

A. Franceschini, E. Prandini, L. Foffano, S. Paiano

arxiv:1903.07972 v2 · 2019-03-19 · 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{2ZVF2NACIQWEWDU2OKSTWAIKAE}

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	2026-05-17T23:40:17.389668Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d66a5d3402442c4b0e9a72a53b010a010a95728304dbf9bbd9ede670dc007d1c

Aliases

arxiv: 1903.07972 · arxiv_version: 1903.07972v2 · doi: 10.48550/arxiv.1903.07972 · pith_short_12: 2ZVF2NACIQWE · pith_short_16: 2ZVF2NACIQWEWDU2 · pith_short_8: 2ZVF2NAC

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/2ZVF2NACIQWEWDU2OKSTWAIKAE \
  | 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: d66a5d3402442c4b0e9a72a53b010a010a95728304dbf9bbd9ede670dc007d1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d196481570545b5a2f447fe9c6c2798646a799d7a2957e40c9cf2d869a4528ec",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-03-19T13:02:35Z",
    "title_canon_sha256": "e0ab65fb919013d6d1164e180b2508cca96055372ee33c0bdd1d9f38634341dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.07972",
    "kind": "arxiv",
    "version": 2
  }
}