Pith Number

pith:6DF4MFVK

pith:2019:6DF4MFVKZL3A76MPDO63OBITU2

not attested not anchored not stored refs pending

The matter beyond the ring: the recent evolution of SN 1987A observed by the Hubble Space Telescope

B. Leibundgut, C. Fransson, D. Alp, G. Sonneborn, J. C. Wheeler, J. Larsson, J. Sollerman, J. Spyromilio, K. France, K. Migotto, N. B. Suntzeff, P. Challis, P. Lundqvist, R. A. Chevalier, R. P. Kirshner, S. Lawrence, S. Mattila

arxiv:1910.09582 v1 · 2019-10-21 · astro-ph.HE · astro-ph.GA · 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{6DF4MFVKZL3A76MPDO63OBITU2}

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.

Cited by

1 paper in Pith

Chandra X-Ray Imaging and Spatially Resolved Spectroscopy of SN 1987A: Energy-Dependent Morphology of the Equatorial Ring

Receipt and verification

First computed	2026-07-05T00:30:31.166946Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f0cbc616aacaf60ff98f1bbdb70513a6a452c6007cc14b3469ba11f1a35a300e

Aliases

arxiv: 1910.09582 · arxiv_version: 1910.09582v1 · doi: 10.48550/arxiv.1910.09582 · pith_short_12: 6DF4MFVKZL3A · pith_short_16: 6DF4MFVKZL3A76MP · pith_short_8: 6DF4MFVK

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/6DF4MFVKZL3A76MPDO63OBITU2 \
  | 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: f0cbc616aacaf60ff98f1bbdb70513a6a452c6007cc14b3469ba11f1a35a300e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4adc412291e6bde16645ada2f05146dc521d7f82a693948725af2e5ee6ea0bb8",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-10-21T18:20:48Z",
    "title_canon_sha256": "3a0d0a758ef0f1b98a240d1b5b2391ae563c4617918e4b7f259f507860ecbf15"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1910.09582",
    "kind": "arxiv",
    "version": 1
  }
}