Pith Number

pith:MLSMUG24

pith:1999:MLSMUG24YHVV4FETCURP3XSPBT

not attested not anchored not stored refs pending

Variability Pattern and the Spectral Evolution of the BL Lacertae Object PKS 2155-304

C. M. Urry, F. Makino, G. M. Madejski, H. Kubo, J. Kataoka, M. Tashiro, S. Inoue, T. Takahashi

arxiv:astro-ph/9908090 v1 · 1999-08-09 · 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{MLSMUG24YHVV4FETCURP3XSPBT}

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	2026-07-04T16:11:30.455063Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

62e4ca1b5cc1eb5e14931522fdde4f0cdf5d752463e15c0eb34045edb34ea771

Aliases

arxiv: astro-ph/9908090 · arxiv_version: astro-ph/9908090v1 · doi: 10.48550/arxiv.astro-ph/9908090 · pith_short_12: MLSMUG24YHVV · pith_short_16: MLSMUG24YHVV4FET · pith_short_8: MLSMUG24

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/MLSMUG24YHVV4FETCURP3XSPBT \
  | 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: 62e4ca1b5cc1eb5e14931522fdde4f0cdf5d752463e15c0eb34045edb34ea771

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b7696d2bcfe86820a0635f9508eec0be3ce086723e00d506599ec152ee87c35",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-08-09T05:57:52Z",
    "title_canon_sha256": "d03015ec817cc06b250cfe42b13a88e6a67ec55c3009a9d79c72de2f06668c44"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9908090",
    "kind": "arxiv",
    "version": 1
  }
}