Pith Number

pith:ZFL4FOB4

pith:2015:ZFL4FOB44C5BVMJ7CUXH2DG56D

not attested not anchored not stored refs pending

A Periodically Varying Luminous Quasar at z=2 from the Pan-STARRS1 Medium Deep Survey: A Candidate Supermassive Black Hole Binary in the Gravitational Wave-Driven Regime

(2) University of Hawaii, (3) GMTO Corporation), Christopher Waters (2) ((1) University of Maryland, Eugene A. Magnier (2), Heather Flewelling (2), John L. Tonry (2), Kenneth Chambers (2), Klaus W. Hodapp (2), Mark Huber (2), Nicholas Kaiser (2), Richard J. Wainscoat (2), Rolf-Peter Kudritzki (2), Sebastien Heinis (1), Suvi Gezari (1), Tingting Liu (1), William S. Burgett (3)

arxiv:1503.02083 v2 · 2015-03-06 · 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{ZFL4FOB44C5BVMJ7CUXH2DG56D}

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	2026-05-18T02:03:50.394192Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c957c2b83ce0ba1ab13f152e7d0cddf0dbe4773633380313ba65c4c86a67ca53

Aliases

arxiv: 1503.02083 · arxiv_version: 1503.02083v2 · doi: 10.48550/arxiv.1503.02083 · pith_short_12: ZFL4FOB44C5B · pith_short_16: ZFL4FOB44C5BVMJ7 · pith_short_8: ZFL4FOB4

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/ZFL4FOB44C5BVMJ7CUXH2DG56D \
  | 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: c957c2b83ce0ba1ab13f152e7d0cddf0dbe4773633380313ba65c4c86a67ca53

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "03e4a34fa26a1371a0c9654609a00b8c4862b5769bb7f0e3056c48b43979a4b1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2015-03-06T21:00:47Z",
    "title_canon_sha256": "e79fe9267b4d2e75a45074437d703440c7968d9f351a1bda3c2321f48691327f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.02083",
    "kind": "arxiv",
    "version": 2
  }
}