Pith Number

pith:QJCMFOCR

pith:2026:QJCMFOCROFQPZJCHZE6TRLMA6B

not attested not anchored not stored refs pending

The outer rings of SN 1987A from year 1994 to 2024: morphology, light curves, and optical to mid-infrared spectra

Alec S. Hirschauer, Beth Sargent, Christa Gall, Claes Fransson, Elko Gerville-Reache, Jason Spyromilio, Jesper Sollerman, Josefin Larsson, Margaret Meixner, Mikako Matsuura, Olivia C. Jones, Patrick J. Kavanagh, Peter Lundqvist, Robert D. Gehrz, Robert P. Kirshner, Sophie Rosu, Steven Thomas

arxiv:2605.30043 v1 · 2026-05-28 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QJCMFOCROFQPZJCHZE6TRLMA6B}

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	2026-05-29T02:06:08.308637Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8244c2b8517160fca447c93d38ad80f065a08c4377860f53acd8c9627b40b903

Aliases

arxiv: 2605.30043 · arxiv_version: 2605.30043v1 · doi: 10.48550/arxiv.2605.30043 · pith_short_12: QJCMFOCROFQP · pith_short_16: QJCMFOCROFQPZJCH · pith_short_8: QJCMFOCR

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/QJCMFOCROFQPZJCHZE6TRLMA6B \
  | 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: 8244c2b8517160fca447c93d38ad80f065a08c4377860f53acd8c9627b40b903

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9b67bf412b725ef90db75a897b0c78f5ab7ad2e22b811c12dd1cfbec7abd04e6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-05-28T14:57:31Z",
    "title_canon_sha256": "1e454324a149cda0258322bc274d9d044250220d5e73c594b89efb1870ce8d8c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.30043",
    "kind": "arxiv",
    "version": 1
  }
}