Pith Number

pith:P4WWQ76U

pith:2014:P4WWQ76UKV6WVGRS7GZ6END3HU

not attested not anchored not stored refs pending

The Discovery of the First "Changing Look" Quasar: New Insights into the Physics & Phenomenology of AGN

Adam D. Myers (University of Wyoming), C. Meg Urry (Yale University), Edward C. Moran (Weslyan University), Gordon T. Richards (Drexel University), Luigi Gallo (St. Mary's University), Michael Eracleous (Penn State University), Sabrina Cales (Universidad de Concepcion, Stephanie M. LaMassa (Yale University), Timothy M. Heckman (Johns Hopkins University), Yale University)

arxiv:1412.2136 v3 · 2014-12-05 · 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{P4WWQ76UKV6WVGRS7GZ6END3HU}

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

3 papers in Pith

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

Simulation-Based Prediction of Black Hole Fe K$\alpha$ Line Profiles

Exploring the Transitional Parameter Space of Blazars using Gamma-ray and X-ray Population Diagnostics

Receipt and verification

First computed	2026-05-18T01:41:21.269921Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f2d687fd4557d6a9a32f9b3e2347b3d3a50ebd99f2455c21a1630b432149f71

Aliases

arxiv: 1412.2136 · arxiv_version: 1412.2136v3 · doi: 10.48550/arxiv.1412.2136 · pith_short_12: P4WWQ76UKV6W · pith_short_16: P4WWQ76UKV6WVGRS · pith_short_8: P4WWQ76U

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/P4WWQ76UKV6WVGRS7GZ6END3HU \
  | 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: 7f2d687fd4557d6a9a32f9b3e2347b3d3a50ebd99f2455c21a1630b432149f71

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "627c092f95ff68b9b6d4fe8698e0c010edb60a02a6e42d86b6b028bc434c74c5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2014-12-05T21:00:08Z",
    "title_canon_sha256": "5bcbe2fea92878b1a55de7ffe1d03bf9f6bcf7ab1858fe842af128772fefdbf4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.2136",
    "kind": "arxiv",
    "version": 3
  }
}