Pith Number

pith:QRLIZU52

pith:2021:QRLIZU523PONVKT6WCT2DLWRJE

not attested not anchored not stored refs pending

A model-driven search for extreme BL Lacs among LAT BCU

A. Dominguez, G. Chiaro, G. La Mura (for the Fermi-LAT collaboration), M. Nievas Rosillo

arxiv:2109.13568 v2 · 2021-09-28 · 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{QRLIZU523PONVKT6WCT2DLWRJE}

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	2026-07-05T03:18:30.517364Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84568cd3badbdcdaaa7eb0a7a1aed14916402d9388fa9c0fdf9e4ef4535d6a07

Aliases

arxiv: 2109.13568 · arxiv_version: 2109.13568v2 · doi: 10.48550/arxiv.2109.13568 · pith_short_12: QRLIZU523PON · pith_short_16: QRLIZU523PONVKT6 · pith_short_8: QRLIZU52

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/QRLIZU523PONVKT6WCT2DLWRJE \
  | 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: 84568cd3badbdcdaaa7eb0a7a1aed14916402d9388fa9c0fdf9e4ef4535d6a07

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82901f78b84c357b0ab848e3ef8d45fc518e2e3ceb8a304765405097034bdf63",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-09-28T08:59:51Z",
    "title_canon_sha256": "38050af9f6d0a1e6733be5bd2cf0ad507953a2b65534a7309b0b25b9c59f76bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.13568",
    "kind": "arxiv",
    "version": 2
  }
}