Pith Number

pith:DZ2OJ6XN

pith:2007:DZ2OJ6XNBMGA5UERITBSHCDKBI

not attested not anchored not stored refs pending

Quasar Broad Absorption Line Variability on Multi-Year Time Scales

Donald P. Schneider, Robert R. Gibson, S. C. Gallagher, W. N. Brandt

arxiv:0712.1831 v1 · 2007-12-11 · 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{DZ2OJ6XNBMGA5UERITBSHCDKBI}

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

Discovery of four Narrow-line Type-1 Quasars at z = 2.54 -- 6.06 with Subaru 'Onohi'ula PFS-SSP

Receipt and verification

First computed	2026-07-04T17:07:12.664391Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e74e4faed0b0c0ed09144c323886a0a0c57a2b90a5bba34b8670370b7e11b27

Aliases

arxiv: 0712.1831 · arxiv_version: 0712.1831v1 · doi: 10.48550/arxiv.0712.1831 · pith_short_12: DZ2OJ6XNBMGA · pith_short_16: DZ2OJ6XNBMGA5UER · pith_short_8: DZ2OJ6XN

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/DZ2OJ6XNBMGA5UERITBSHCDKBI \
  | 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: 1e74e4faed0b0c0ed09144c323886a0a0c57a2b90a5bba34b8670370b7e11b27

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7f21bc7ee19ee7f1aa8409ec8af69d492909611c5a78869534a513b55760af5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-12-11T21:22:39Z",
    "title_canon_sha256": "00518eb1d96ed6586765527de06808aec48ff346c78fd6f1afde98c12bac30d8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0712.1831",
    "kind": "arxiv",
    "version": 1
  }
}