Pith Number

pith:EUBARKAR

pith:2018:EUBARKAR6XHU4MODPDGLCVET7W

not attested not anchored not stored refs pending

The Frequency of Intrinsic X-ray Weakness Among Broad Absorption Line Quasars

B. Luo, G. P. Garmire, Hezhen Liu, S. C. Gallagher, W. N. Brandt

arxiv:1804.05074 v1 · 2018-04-13 · astro-ph.HE · 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{EUBARKAR6XHU4MODPDGLCVET7W}

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	2026-05-18T00:13:26.323109Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

250208a811f5cf4e31c378ccb15493fd80df30819468b46874b75a4e34912eed

Aliases

arxiv: 1804.05074 · arxiv_version: 1804.05074v1 · doi: 10.48550/arxiv.1804.05074 · pith_short_12: EUBARKAR6XHU · pith_short_16: EUBARKAR6XHU4MOD · pith_short_8: EUBARKAR

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/EUBARKAR6XHU4MODPDGLCVET7W \
  | 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: 250208a811f5cf4e31c378ccb15493fd80df30819468b46874b75a4e34912eed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7bf97e1a37cbab41420b3692d530a3b1281ce4b5482f11ce6d52e78ae668624",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2018-04-13T18:08:00Z",
    "title_canon_sha256": "42a789b26180b81e58ae65c4ce8aded74c8aa68b08589ead9f910174dc29dfef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.05074",
    "kind": "arxiv",
    "version": 1
  }
}