Pith Number

pith:QPBTDRGI

pith:1997:QPBTDRGIB56FNSNLFJ3GBWYNBN

not attested not anchored not stored refs pending

Scattering and Absorption in Soft X-ray Selected AGN: An Optical Polarization Survey

B.J. Wills, D. Grupe, D. Wills, K. Beuermann

arxiv:astro-ph/9712149 v1 · 1997-12-11 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QPBTDRGIB56FNSNLFJ3GBWYNBN}

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	2026-05-18T03:47:42.663191Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83c331c4c80f7c56c9ab2a7660db0d0b7a44e5b6237d0cff907f7b3a953077bb

Aliases

arxiv: astro-ph/9712149 · arxiv_version: astro-ph/9712149v1 · doi: 10.48550/arxiv.astro-ph/9712149 · pith_short_12: QPBTDRGIB56F · pith_short_16: QPBTDRGIB56FNSNL · pith_short_8: QPBTDRGI

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/QPBTDRGIB56FNSNLFJ3GBWYNBN \
  | 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: 83c331c4c80f7c56c9ab2a7660db0d0b7a44e5b6237d0cff907f7b3a953077bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9da90f3779e8d7bf4af6aa421d9dd16ba950643e82917b82e79ab8ca04529c10",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-12-11T13:36:09Z",
    "title_canon_sha256": "c60b5e19dd9cfd53eca3ad47d16dd1f127581bf91085a47cee3c3c2abe249029"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9712149",
    "kind": "arxiv",
    "version": 1
  }
}