Pith Number

pith:DJ74CGCK

pith:2018:DJ74CGCKZBKJ7LY3IL4UIBDX6G

not attested not anchored not stored refs pending

A catalog of narrow-line Seyfert 1 galaxies in the southern hemisphere

D. Bastieri, E. Congiu, G. La Mura, J.H. Fan, L. Foschini, M. Berton, P. Rafanelli, S. Chen, S. Ciroi, V. Cracco

arxiv:1809.06459 v1 · 2018-09-17 · 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{DJ74CGCKZBKJ7LY3IL4UIBDX6G}

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	2026-05-18T00:05:27.156445Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a7fc1184ac8549faf1b42f9440477f1a1547ea69c454fb4bda8c4ac283a196c

Aliases

arxiv: 1809.06459 · arxiv_version: 1809.06459v1 · doi: 10.48550/arxiv.1809.06459 · pith_short_12: DJ74CGCKZBKJ · pith_short_16: DJ74CGCKZBKJ7LY3 · pith_short_8: DJ74CGCK

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/DJ74CGCKZBKJ7LY3IL4UIBDX6G \
  | 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: 1a7fc1184ac8549faf1b42f9440477f1a1547ea69c454fb4bda8c4ac283a196c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5db0d1a07e24be8b3469d1181d31c8399d1d994b3daa7c88975c597aa697e0a5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-09-17T22:05:41Z",
    "title_canon_sha256": "a17f38c7f66d57a84a951001f9dd04484a6af130c5f71cb9eecdc84de572bd3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.06459",
    "kind": "arxiv",
    "version": 1
  }
}