Pith Number

pith:GY7EDR2T

pith:2015:GY7EDR2T6XB43FMORP5DNMY6SG

not attested not anchored not stored refs pending

SDSS J013127.34-032100.1: a candidate blazar with a 11 billion solar mass black hole at $z$=5.18

2), (2) Univ. Milano-Bicocca (3) Goddard), G. Ghisellini (1), G. Tagliaferri (1), N. Gehrels (3) ((1) INAF -- Brera Obs., T. Sbarrato (1

arxiv:1501.07269 v2 · 2015-01-28 · 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{GY7EDR2T6XB43FMORP5DNMY6SG}

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	2026-05-18T01:41:06.075174Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

363e41c753f5c3cd958e8bfa36b31e9196562b20727d5524f29fad2a7b7189a9

Aliases

arxiv: 1501.07269 · arxiv_version: 1501.07269v2 · doi: 10.48550/arxiv.1501.07269 · pith_short_12: GY7EDR2T6XB4 · pith_short_16: GY7EDR2T6XB43FMO · pith_short_8: GY7EDR2T

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/GY7EDR2T6XB43FMORP5DNMY6SG \
  | 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: 363e41c753f5c3cd958e8bfa36b31e9196562b20727d5524f29fad2a7b7189a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f95a5fe8be1bff27c3394ce62a49bb4559c387d8a5bedfa6b93b33a9dbb9b1c2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2015-01-28T21:00:01Z",
    "title_canon_sha256": "a787c885ce0376a55d03569bb6e1068e1fa82bd3cbaf5e5ea1b50820a6795968"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.07269",
    "kind": "arxiv",
    "version": 2
  }
}