Pith Number

pith:24EYRRUV

pith:2025:24EYRRUVDG64LDIG27F7QQCWHO

not attested not anchored not stored refs pending

SDSO1 is a Shocked Ghost Planetary Nebula in Front of M 31

Alberto Noriega-Crespo, Biny Sebastian, Carl Bjork, Lewis McCallum, Marcel Dreschsler, Mark Petersen, Patrick Ogle, Patrick Sparkman, R. Michael Rich, Sendhil Chinnasamy, Steeve Body, Tarun Kottary, Tim Schaeffer, Xavier Strottner, Yann Sainty

arxiv:2507.15834 v2 · 2025-07-21 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{24EYRRUVDG64LDIG27F7QQCWHO}

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

Ancient 'ghost' planetary nebulae discovered with amateur telescopes

Receipt and verification

First computed	2026-05-26T01:03:13.617586Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d70988c69519bdc58d06d7cbf840563b93cabb21a1bab6f14458c088126319bd

Aliases

arxiv: 2507.15834 · arxiv_version: 2507.15834v2 · doi: 10.48550/arxiv.2507.15834 · pith_short_12: 24EYRRUVDG64 · pith_short_16: 24EYRRUVDG64LDIG · pith_short_8: 24EYRRUV

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/24EYRRUVDG64LDIG27F7QQCWHO \
  | 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: d70988c69519bdc58d06d7cbf840563b93cabb21a1bab6f14458c088126319bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "97b713a37dabbe433dbd619fe99a0d2aca3f836d64c5df89b6ec0bb421ae12b5",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-07-21T17:44:19Z",
    "title_canon_sha256": "4d38c95756becddbc18dc9f8d00c34379b805d5f2bb71e015ebd5c4375851b32"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.15834",
    "kind": "arxiv",
    "version": 2
  }
}