Pith Number

pith:GULW7HXY

pith:2018:GULW7HXYKRJZ2G4UWYCYFDJ44Q

not attested not anchored not stored refs pending

The Changing-Look Quasar Mrk 590 is Awakening

A. Gupta, B. M. Peterson, F. Nicastro, G. De Rosa, J. Collinson, K.D. Denney, K. Korista, M. Goad, M. Vestergaard, R.W. Pogge, S. Mathur, Y. Krongold

arxiv:1810.06616 v1 · 2018-10-15 · astro-ph.GA · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GULW7HXYKRJZ2G4UWYCYFDJ44Q}

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

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

Receipt and verification

First computed	2026-05-18T00:00:47.291286Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

35176f9ef854539d1b94b605828d3ce42e268213b3cfd51f9b135eb3dadedbd3

Aliases

arxiv: 1810.06616 · arxiv_version: 1810.06616v1 · doi: 10.48550/arxiv.1810.06616 · pith_short_12: GULW7HXYKRJZ · pith_short_16: GULW7HXYKRJZ2G4U · pith_short_8: GULW7HXY

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/GULW7HXYKRJZ2G4UWYCYFDJ44Q \
  | 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: 35176f9ef854539d1b94b605828d3ce42e268213b3cfd51f9b135eb3dadedbd3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7e57cd0e7cc8cf6a5b595aa24596d7d53853377d1ab5ad0e25358b2643c709e",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-10-15T19:02:35Z",
    "title_canon_sha256": "3e56e369062e52e9fac42f9f869eff00bd37ced59a470aba1af8afea8cf41ba0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.06616",
    "kind": "arxiv",
    "version": 1
  }
}