Pith Number

pith:XZDYKSMR

pith:2021:XZDYKSMRKNW4KAK3RO4WR7TYOH

not attested not anchored not stored refs pending

Spectral Evolution of the X-Ray Remnant of SN 1987A: A High-Resolution $Chandra$ HETG Study

Aravind P. Ravi, David N. Burrows, Kari A. Frank, Marco Miceli, Salvatore Orlando, Sangwook Park, Svetozar A. Zhekov

arxiv:2109.02881 v1 · 2021-09-07 · 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{XZDYKSMRKNW4KAK3RO4WR7TYOH}

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	2026-07-05T03:39:02.315583Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be47854991536dc5015b8bb968fe7871fd9a0b4b17e7c86607984a2b8a01583b

Aliases

arxiv: 2109.02881 · arxiv_version: 2109.02881v1 · doi: 10.48550/arxiv.2109.02881 · pith_short_12: XZDYKSMRKNW4 · pith_short_16: XZDYKSMRKNW4KAK3 · pith_short_8: XZDYKSMR

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/XZDYKSMRKNW4KAK3RO4WR7TYOH \
  | 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: be47854991536dc5015b8bb968fe7871fd9a0b4b17e7c86607984a2b8a01583b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9f99407b8e0318404bd7c5030d0406b3920ae0cbd227a385e2061645fbe75605",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-09-07T05:44:13Z",
    "title_canon_sha256": "3dbbcc8825e042e928e93e2d58c2ed32de229b7945549676acb23ba78ac3844c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.02881",
    "kind": "arxiv",
    "version": 1
  }
}