Pith Number

pith:W4UHYMU6

pith:2020:W4UHYMU6S3TZRLVR4AEXG2A2ST

not attested not anchored not stored refs pending

A hard look at local, optically-selected, obscured Seyfert galaxies

A. M. Lohfink, A. Zoghbi, D. Barret, D. Proga, D. Stern, E. Behar, E. S. Kammoun, J. M. Miller, J. S. Kaastra, K. Oh, L. W. Brenneman, M. Koss, R. F. Mushotzky, W. N. Brandt

arxiv:2007.02616 v2 · 2020-07-06 · 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{W4UHYMU6S3TZRLVR4AEXG2A2ST}

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	2026-07-05T01:42:39.137868Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7287c329e96e798aeb1e00973681a94e156c6cb228ebfeb9920ccf8d53df1cb

Aliases

arxiv: 2007.02616 · arxiv_version: 2007.02616v2 · doi: 10.48550/arxiv.2007.02616 · pith_short_12: W4UHYMU6S3TZ · pith_short_16: W4UHYMU6S3TZRLVR · pith_short_8: W4UHYMU6

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/W4UHYMU6S3TZRLVR4AEXG2A2ST \
  | 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: b7287c329e96e798aeb1e00973681a94e156c6cb228ebfeb9920ccf8d53df1cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d428e6a1ebb044dcd04e07b1e6cadeac7d8d8bc0f371903c5baaeb04e86de7c7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2020-07-06T10:11:44Z",
    "title_canon_sha256": "3d6c487923319da13404548792873fe146e6ddd1e05409229ea4f1846d5a4fe3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.02616",
    "kind": "arxiv",
    "version": 2
  }
}