Pith Number

pith:W44AEIPB

pith:2007:W44AEIPBNTAOUCHEI3RJKW3A3W

not attested not anchored not stored refs pending

Host galaxy subtraction of TeV candidate BL Lacertae objects

A. Berdyugin, E. Lindfors, J. Pforr, K. Nilsson, L. O. Takalo, M. Pasanen, S. Ciprini

arxiv:0709.2533 v2 · 2007-09-17 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W44AEIPBNTAOUCHEI3RJKW3A3W}

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	2026-07-04T17:05:43.920960Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7380221e16cc0ea08e446e2955b60dd9222bc4a4b1a4e7a18e07e69eb337be4

Aliases

arxiv: 0709.2533 · arxiv_version: 0709.2533v2 · doi: 10.48550/arxiv.0709.2533 · pith_short_12: W44AEIPBNTAO · pith_short_16: W44AEIPBNTAOUCHE · pith_short_8: W44AEIPB

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/W44AEIPBNTAOUCHEI3RJKW3A3W \
  | 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: b7380221e16cc0ea08e446e2955b60dd9222bc4a4b1a4e7a18e07e69eb337be4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "33692daeb0f5ee945cd8b4cf8b2ca8c525520687f032f97833c24719c31d6a4a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-09-17T06:09:08Z",
    "title_canon_sha256": "d2e4a1471112957cc32a9735019900ca3dfe71858d191fb70f1004de50d61ab9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0709.2533",
    "kind": "arxiv",
    "version": 2
  }
}