Pith Number

pith:B7ZFMJNL

pith:2019:B7ZFMJNL5GTBG7ECU7BNCQS72C

not attested not anchored not stored refs pending

MUSE observations of a changing-look AGN I: The re-appearance of the broad emission lines

B. M. Peterson (Ohio State, CCAPP, D. Lawther (DARK), J. Y. Koay (ASIAA), M. Vestergaard (DARK, S. I. Raimundo (DARK), Steward Observatory), STScI), V. Casasola (INAF-Instituto di Radioastronomia)

arxiv:1903.08696 v2 · 2019-03-20 · 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{B7ZFMJNL5GTBG7ECU7BNCQS72C}

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	2026-05-17T23:49:01.449560Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ff25625abe9a6137c82a7c2d1425fd0a70252d3ba8fce33260fad975fbbd4b0

Aliases

arxiv: 1903.08696 · arxiv_version: 1903.08696v2 · doi: 10.48550/arxiv.1903.08696 · pith_short_12: B7ZFMJNL5GTB · pith_short_16: B7ZFMJNL5GTBG7EC · pith_short_8: B7ZFMJNL

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/B7ZFMJNL5GTBG7ECU7BNCQS72C \
  | 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: 0ff25625abe9a6137c82a7c2d1425fd0a70252d3ba8fce33260fad975fbbd4b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15453c55610e4ca2a100e59966fd33ca5d1a22177030f9b201d4c588c0aef548",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-03-20T18:55:35Z",
    "title_canon_sha256": "fd01d5b4d522476ff3a29124a3813d0077aca585365f993d6d0edfd8366aa06e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.08696",
    "kind": "arxiv",
    "version": 2
  }
}