Pith Number

pith:SKGBLRGG

pith:2026:SKGBLRGGOZTVWKJIXCHS6QOBRH

not attested not anchored not stored refs pending

SN 2017ati: A luminous type IIb explosion from a massive progenitor

A. Pastorello, A. Reguitti, A. Somero, E. Cappellaro, E. Kankare, J.-J. Zhang, J.-W. Zhao, L. Tomasella, M. D. Stritzinger, M. Fraser, N. Elias-Rosa, P. Lundqvist, Q.-L. Fang, S. Benetti, S. Mattila, S.-P. Pei, T. Kangas, T. M. Reynolds, Y.-J. Yang, Y. Pan, Y.-Z. Cai, Z.-H. Peng, Z. Kostrzewa-Rutkowska, Z.-Y. Wang

SN 2017ati's light curve is powered by both magnetar spin-down and radioactive nickel decay, implying a progenitor of at least 17 solar masses.

arxiv:2602.04474 v2 · 2026-02-04 · astro-ph.SR · astro-ph.GA · astro-ph.HE

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SKGBLRGGOZTVWKJIXCHS6QOBRH}

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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.

Claims

C1strongest claim

its luminosity evolution is best explained by a combination of neutron star spin-down energy and radioactive nickel deposition... the combination of a [CaII]/[OI] flux ratio of ~0.5 with nebular spectral model comparisons favours a progenitor zero-age main-sequence mass of ≥17 M⊙

C2weakest assumption

That the excess late-time luminosity is produced by magnetar spin-down rather than other mechanisms such as circumstellar interaction, and that the nebular line luminosities translate directly to oxygen mass without large systematic uncertainties in the spectral models.

C3one line summary

SN 2017ati's light curve requires both 0.21 solar masses of nickel and magnetar spin-down energy to fit, with nebular spectra implying a progenitor zero-age main-sequence mass of at least 17 solar masses.

Formal links

2 machine-checked theorem links

Cited by

1 paper in Pith

SN 2025aico: Early observations of a faint Type IIb supernova with a low-mass envelope

Receipt and verification

First computed	2026-05-20T14:03:24.906510Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

928c15c4c676675b2928b88f2f41c189c410247c73dff2b49dbc290a4b94848e

Aliases

arxiv: 2602.04474 · arxiv_version: 2602.04474v2 · doi: 10.48550/arxiv.2602.04474 · pith_short_12: SKGBLRGGOZTV · pith_short_16: SKGBLRGGOZTVWKJI · pith_short_8: SKGBLRGG

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/SKGBLRGGOZTVWKJIXCHS6QOBRH \
  | 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: 928c15c4c676675b2928b88f2f41c189c410247c73dff2b49dbc290a4b94848e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "309ecfd287aa9e9d1d7cb61d02a51c8116b3acae40093d2a0a16b75c599921f2",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.HE"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-02-04T12:02:02Z",
    "title_canon_sha256": "9dc247c12e36d32c9962516b750f38620eef2bb452fbf907a76cae1ec7d857de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.04474",
    "kind": "arxiv",
    "version": 2
  }
}