Pith Number

pith:HQKZWL2I

pith:2019:HQKZWL2I25UU6LZO2DCP4F3IWS

not attested not anchored not stored refs pending

Gamma-ray Emitting Narrow-Line Seyfert 1 Galaxies: Past, Present, and Future

D-15738 Zeuthen, Germany), Platanenallee 6, Vaidehi S. Paliya (Deutsches Elektronen Synchrotron DESY

arxiv:1909.01444 v1 · 2019-09-03 · astro-ph.HE · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HQKZWL2I25UU6LZO2DCP4F3IWS}

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	2026-07-05T00:12:06.321185Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c159b2f48d7694f2f2ed0c4fe1768b497e153398d8e7c39cb3f5bd3b64254a0

Aliases

arxiv: 1909.01444 · arxiv_version: 1909.01444v1 · doi: 10.48550/arxiv.1909.01444 · pith_short_12: HQKZWL2I25UU · pith_short_16: HQKZWL2I25UU6LZO · pith_short_8: HQKZWL2I

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/HQKZWL2I25UU6LZO2DCP4F3IWS \
  | 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: 3c159b2f48d7694f2f2ed0c4fe1768b497e153398d8e7c39cb3f5bd3b64254a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "85b2312d046f553d8d5ee145f21f79358fb7b0a2bfbb6d7fa849189c17e7b959",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-09-03T20:39:52Z",
    "title_canon_sha256": "1b87ef595fd08a86b1789c78d92f24538c76ef12a4602005853a3293fdbc896d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.01444",
    "kind": "arxiv",
    "version": 1
  }
}