Table · dataset · 2022
NICER SGR 1935+2154 burst and persistent emission
Listed in IVOA Registry (Virtual Observatory)
We report on NICER observations of the magnetar SGR1935+2154, covering its 2020 burst storm and long-term persistent emission evolution up to ~90days postoutburst.
Description
During the first 1120s taken on April 28 00:40:58 UTC, we detect over 217 bursts, corresponding to a burst rate of >0.2bursts/s. Three hours later, the rate was 0.008bursts/s, remaining at a comparatively low level thereafter.
The T90 burst duration distribution peaks at 840ms; the distribution of waiting times to the next burst is fit with a lognormal with an average of 2.1s. The 1-10keV burst spectra are well fit by a blackbody, with an average temperature and area of kT=1.7keV and R2=53km^2^. The differential burst fluence distribution over ~3 orders of magnitude is well modeled with a power-law form dN/dF {prop}F-1.5{+/-}0.1.
Read the rest (2 more)
The source persistent emission pulse profile is double-peaked hours after the burst storm. We find that the burst peak arrival times follow a uniform distribution in pulse phase, though the fast radio burst associated with the source aligns in phase with the brighter peak. We measure the source spin-down from heavy-cadence observations covering days 21-39 postoutburst, {nu}=-3.72(3)x10^-12^Hz/s, a factor of 2.7 larger than the value measured after the 2014 outburst.
Finally, the persistent emission flux and blackbody temperature decrease rapidly in the early stages of the outburst, reaching quiescence 40days later, while the size of the emitting area remains unchanged.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/904/L21 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2020ApJ...904L..21Y ui.adsabs.harvard.edu/abs/2020ApJ...904L..21Y ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/apj/904/l21 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 69%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/904/l21 | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (69%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:gamma-ray | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:x-ray | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |