Pith Number

pith:B6FTMIMD

pith:2011:B6FTMIMD2CCIC7S6VRBMTP7WQO

not attested not anchored not stored refs pending

A Population of X-ray Weak Quasars: PHL 1811 Analogs at High Redshift

Dennis W. Just, Donald P. Schneider, Gordon T. Richards, Jianfeng Wu, Ohad Shemmer, Patrick B. Hall, Robert R. Gibson, Sarah J. Schmidt, W. N. Brandt

arxiv:1104.3861 v1 · 2011-04-19 · astro-ph.CO · astro-ph.GA · 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{B6FTMIMD2CCIC7S6VRBMTP7WQO}

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.

Cited by

1 paper in Pith

Strong X-ray Variability of I Zwicky 1: Obscuration from Clumpy Accretion-Disk Winds

Receipt and verification

First computed	2026-05-18T02:20:11.216584Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f8b362183d084817e5eac42c9bff683bea335a02fa5f678a944b46ca90b0dc9

Aliases

arxiv: 1104.3861 · arxiv_version: 1104.3861v1 · doi: 10.48550/arxiv.1104.3861 · pith_short_12: B6FTMIMD2CCI · pith_short_16: B6FTMIMD2CCIC7S6 · pith_short_8: B6FTMIMD

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/B6FTMIMD2CCIC7S6VRBMTP7WQO \
  | 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: 0f8b362183d084817e5eac42c9bff683bea335a02fa5f678a944b46ca90b0dc9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4680a1122a2211b9a8657ebf4bdb442ce267bf00f6cbcc2e9ba957785c193236",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-04-19T20:00:03Z",
    "title_canon_sha256": "84ce8be43f53bf25ee6d76c6b8417c52e85d0053b801c72d098d5f55cd368002"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.3861",
    "kind": "arxiv",
    "version": 1
  }
}