Pith Number

pith:WDUV4VC4

pith:2020:WDUV4VC445NRKDTRQNQYMZ22U5

not attested not anchored not stored refs pending

Optimising a magnitude-limited spectroscopic training sample for photometric classification of supernovae

Alex G. Kim, Chris Frohmaier, Elizabeth Swann, Isobel M. Hook, Jonathan E. Carrick, Kyle Boone, Mark Sullivan (for the LSST Dark Energy Science Collaboration)

arxiv:2012.12122 v3 · 2020-12-22 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WDUV4VC445NRKDTRQNQYMZ22U5}

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	2026-07-05T03:17:01.529821Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0e95e545ce75b150e71836186675aa76ec00b176a79b7cb4e75771025d41aab

Aliases

arxiv: 2012.12122 · arxiv_version: 2012.12122v3 · doi: 10.48550/arxiv.2012.12122 · pith_short_12: WDUV4VC445NR · pith_short_16: WDUV4VC445NRKDTR · pith_short_8: WDUV4VC4

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/WDUV4VC445NRKDTRQNQYMZ22U5 \
  | 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: b0e95e545ce75b150e71836186675aa76ec00b176a79b7cb4e75771025d41aab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c0ed2c6c50e1ef758f8d1695d3ae3021d21c0301c7feeb8580346589f9a4e982",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2020-12-22T16:03:39Z",
    "title_canon_sha256": "684eec98a4c7db6fc2a0099544a6cf7f5c0dcefda596285989b1f4d8bb73a1ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2012.12122",
    "kind": "arxiv",
    "version": 3
  }
}