Pith Number

pith:6A54ANRX

pith:1999:6A54ANRXBNRSE7G5MF5FCG7CFR

not attested not anchored not stored refs pending

The concave X-ray spectrum of the blazar ON 231: the signature of intermediate BL Lac objects

A. Celotti, A. Treves, A. Wolter, C.M. Raiteri, E.Massaro, E. Pian, F. Montagni, F. Tavecchio, G. Fossati, G. Ghisellini, G. Nucciarelli, G. Tagliaferri, G. Tosti, L. Chiappetti, L. Maraschi, M. Chiaberge, M. Maesano, M. Villata, P. Giommi, R. Nesci

arxiv:astro-ph/9912055 v1 · 1999-12-02 · 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{6A54ANRXBNRSE7G5MF5FCG7CFR}

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	2026-07-04T14:17:23.403903Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f03bc036370b63227cdd617a511be22c5f1c45b94e083e6ebbed4b8e8939aad6

Aliases

arxiv: astro-ph/9912055 · arxiv_version: astro-ph/9912055v1 · doi: 10.48550/arxiv.astro-ph/9912055 · pith_short_12: 6A54ANRXBNRS · pith_short_16: 6A54ANRXBNRSE7G5 · pith_short_8: 6A54ANRX

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/6A54ANRXBNRSE7G5MF5FCG7CFR \
  | 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: f03bc036370b63227cdd617a511be22c5f1c45b94e083e6ebbed4b8e8939aad6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fce3dfc6f3e9dc7717b5cb313379b0f7d2240d1bde25f375c391b6201994c6e8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-12-02T17:25:55Z",
    "title_canon_sha256": "1221b7a76dc2a4475d3f605f00dc84eaf0a7defad5bd5b66aa5c839b1d652198"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9912055",
    "kind": "arxiv",
    "version": 1
  }
}