Pith Number

pith:H6DAAYSC

pith:2025:H6DAAYSCOITS44MQHOR2MGETHL

not attested not anchored not stored refs pending

A Detailed Look at a Trio of Changing-Look Quasars: Spectral Energy Distributions and the Dust Extinction Test

Jessie C. Runnoe, John J. Ruan, Laura Duffy, Michael Eracleous, Paul Green, Sabrina Dimassimo, Scott F. Anderson, Stephanie LaMassa

arxiv:2501.13174 v1 · 2025-01-22 · 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{H6DAAYSCOITS44MQHOR2MGETHL}

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	2026-07-05T10:04:24.568018Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f8600624272272e71903ba3a618933ae73967c8bb6da58a1f774aa427fac476

Aliases

arxiv: 2501.13174 · arxiv_version: 2501.13174v1 · doi: 10.48550/arxiv.2501.13174 · pith_short_12: H6DAAYSCOITS · pith_short_16: H6DAAYSCOITS44MQ · pith_short_8: H6DAAYSC

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/H6DAAYSCOITS44MQHOR2MGETHL \
  | 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: 3f8600624272272e71903ba3a618933ae73967c8bb6da58a1f774aa427fac476

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "35df1fa6ef71dd3d35d2853a8560414ed1cdb328259f2d01539055dc7d5dee28",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-01-22T19:04:54Z",
    "title_canon_sha256": "faa695bc615aa0b61e7928ee8b2a4521f8a8e91ccab032cdb1424f650c27a2f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.13174",
    "kind": "arxiv",
    "version": 1
  }
}