Pith Number

pith:BDTQ4JUT

pith:2022:BDTQ4JUTZXOC6K26HNKWL75EW3

not attested not anchored not stored refs pending

An XMM-Newton catalogue of BL Lacs

A. Rouco, E. Racero, I. de la Calle P\'erez, N. \'Alvarez Crespo

arxiv:2201.04468 v1 · 2022-01-12 · 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{BDTQ4JUTZXOC6K26HNKWL75EW3}

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	2026-07-05T03:48:00.604646Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08e70e2693cddc2f2b5e3b5565ffa4b6ca58aec3a856f148765d6f2d3c988820

Aliases

arxiv: 2201.04468 · arxiv_version: 2201.04468v1 · doi: 10.48550/arxiv.2201.04468 · pith_short_12: BDTQ4JUTZXOC · pith_short_16: BDTQ4JUTZXOC6K26 · pith_short_8: BDTQ4JUT

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/BDTQ4JUTZXOC6K26HNKWL75EW3 \
  | 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: 08e70e2693cddc2f2b5e3b5565ffa4b6ca58aec3a856f148765d6f2d3c988820

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "af49ec3842cf7ee74f5ca1ce8f28060c8377904b4727815600d7cccd68b55137",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2022-01-12T13:38:18Z",
    "title_canon_sha256": "174b7e24ecdb1e1a31afbdbe914f74c7cf006ac3d26bf9e0c57cd8514fd72689"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2201.04468",
    "kind": "arxiv",
    "version": 1
  }
}