Pith Number

pith:LGMXISWX

pith:2020:LGMXISWXFQ57OW3KQ3I5CJ3GC3

not attested not anchored not stored refs pending

Dying of the Light: An X-ray Fading Cold Quasar at z ~ 0.405

Alessandro Peca, Allison Kirkpatrick, C. Megan Urry, Eilat Glikman, Hugo Messias, Jason Brewster, Jonathan R. Trump, Kevin C. Cooke, Michael Estrada, Nico Cappelluti, Stephanie LaMassa, T. K. Daisy Leung, Tonima Tasnim Ananna, Tracey Jane Turner

arxiv:2009.08465 v2 · 2020-09-17 · 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{LGMXISWXFQ57OW3KQ3I5CJ3GC3}

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	2026-07-05T02:04:29.024905Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5999744ad72c3bf75b6a86d1d1276616de3a5204a3b19ecf479078ab57818c97

Aliases

arxiv: 2009.08465 · arxiv_version: 2009.08465v2 · doi: 10.48550/arxiv.2009.08465 · pith_short_12: LGMXISWXFQ57 · pith_short_16: LGMXISWXFQ57OW3K · pith_short_8: LGMXISWX

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/LGMXISWXFQ57OW3KQ3I5CJ3GC3 \
  | 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: 5999744ad72c3bf75b6a86d1d1276616de3a5204a3b19ecf479078ab57818c97

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c9706d7e798bd657a213c0523ef37ef833b498cf22c73cb7ef6f439353c00c58",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-09-17T18:00:02Z",
    "title_canon_sha256": "1feca2e5725b0c78feee0b97ba03889ebf23916e666377f057bd851dfadecfc5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2009.08465",
    "kind": "arxiv",
    "version": 2
  }
}