Pith Number

pith:J5S4URHC

pith:2018:J5S4URHCGPPYSV7B6CD4BJW37U

not attested not anchored not stored refs pending

Probing 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:1801.07234 v4 · 2018-01-22 · 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{J5S4URHCGPPYSV7B6CD4BJW37U}

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	2026-05-18T00:05:50.995710Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f65ca44e233df8957e1f087c0a6dbfd0f690d7baf98fce451cd9750249b6f79

Aliases

arxiv: 1801.07234 · arxiv_version: 1801.07234v4 · doi: 10.48550/arxiv.1801.07234 · pith_short_12: J5S4URHCGPPY · pith_short_16: J5S4URHCGPPYSV7B · pith_short_8: J5S4URHC

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/J5S4URHCGPPYSV7B6CD4BJW37U \
  | 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: 4f65ca44e233df8957e1f087c0a6dbfd0f690d7baf98fce451cd9750249b6f79

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "387c6bee787b241359492b6d296d29ab06ad1912a64602d3bd3fa9979ae633f0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-01-22T18:32:03Z",
    "title_canon_sha256": "f8f48a997b51e848bfc0d8fb8711d2c73448cc1bc6a5380115a1149e2bb9e13c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.07234",
    "kind": "arxiv",
    "version": 4
  }
}