Pith Number

pith:YYFFFQER

pith:2022:YYFFFQERFNI3C77SWEXN7DJZSE

not attested not anchored not stored refs pending

A Transient "Changing-look'' Active Galactic Nucleus Resolved on Month Timescales from First-year Sloan Digital Sky Survey V Data

Andrea Merloni, Anton M. Koekemoer, Benny Trakhtenbrot, Chelsea MacLeod, Claudio Ricci, Craig Pellegrino, David Homan, Donald P. Schneider, Franz E. Bauer, Grisha Zeltyn, Hector Ibarra-Medel, Jamison Burke, Jessie Runnoe, Joel R. Brownstein, Jonathan R. Trump, Jonathan Stern, Juna A. Kollmeier, Logan Fries, Lorena Hernandez-Garcia, Mary Loli Martinez-Aldama, Matthew J. Temple, Megan C. Davis, Michael Eracleous, Mirko Krumpe, Muryel Guolo, Norman A. Grogin, Paul Green, Qian Yang, Roberto J. Assef, Scott F. Anderson, Stephanie LaMassa, Suvi Gezari, Tom Dwelly, Xin Liu, Yue Shen

arxiv:2210.07258 v2 · 2022-10-13 · 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{YYFFFQERFNI3C77SWEXN7DJZSE}

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	2026-07-05T05:13:19.876586Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c60a52c0912b51b17ff2b12edf8d3991345a0096e347747021743ddf92b70380

Aliases

arxiv: 2210.07258 · arxiv_version: 2210.07258v2 · doi: 10.48550/arxiv.2210.07258 · pith_short_12: YYFFFQERFNI3 · pith_short_16: YYFFFQERFNI3C77S · pith_short_8: YYFFFQER

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/YYFFFQERFNI3C77SWEXN7DJZSE \
  | 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: c60a52c0912b51b17ff2b12edf8d3991345a0096e347747021743ddf92b70380

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44a14185ae0abcd3c3e0ff1aa3efce89cd17abd0f32a78db23ba84730f6e82ec",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2022-10-13T18:00:06Z",
    "title_canon_sha256": "567cd75c7b0d6674c5de032d68c493fdecfb6a50d17d8e8417e5b0016d7940aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2210.07258",
    "kind": "arxiv",
    "version": 2
  }
}