2023RNAAS...7...73F

Query : 2023RNAAS...7...73F

2023RNAAS...7...73F - Research Notes of the AAS, 7, 73 (2023/April-0)

Calibration Target Selection for the SPARCS Satellite.

FRYMIRE A. and ARDILA D.

Abstract (from CDS):

The Star-Planet Activity Research CubeSat (SPARCS) is an upcoming NASA mission to understand the impact of low-mass stellar radiation on exoplanets. SPARCS will obtain photometric observations of low-mass stars in two bands: 153-171 nm (Far-UV; FUV) and 258-308 nm (Near-UV; NUV). SPARCS' absolute calibration will be derived by observing White Dwarfs (WDs). WD selected as SPARCS calibrators should vary ≤7%. Here we present a study of UV variability of potential WD calibrators, based on Galaxy Evolution Explorer and HST/UVIS photometric observations. We collected data on a sample of 29 WDs from the Mikulski Archive for Space Telescopes and identified 8 potential SPARCS calibration targets in the NUV and 5 in the FUV, for a total of 10 distinct targets. Statistical analysis shows variability <3% in both bands. For some stars, the intrinsic astrophysical variability is smaller than these limits.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): DO stars - Calibration - DA stars - DB stars

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1153 0
2 GD 71 WD* 05 52 27.6198591816 +15 53 13.228887444 11.675 12.783 13.032 13.169 13.337 DA1.5 407 0
3 GD 153 WD* 12 57 02.3224909560 +22 01 52.634778240 11.883 13.060 13.349 13.488 13.669 DA1.2 380 0
4 GALEX J132811.4+463050 WD* 13 28 11.4983438448 +46 30 50.934891420           DA 20 0
5 LB 769 WD* 15 14 21.2727679272 +00 47 52.809370512   15.61 16.5 16.2   DA1.8 51 0
6 PG 1657+344 WD* 16 58 51.1124739360 +34 18 53.321336856   16.12       DA.9 70 0
7 LAWD 74 WD* 19 20 34.9229289504 -07 40 00.065957592 11.553 12.345 12.290 12.229 12.164 DBQA5 250 0
8 HS 2027+0651 WD* 20 29 32.5058738256 +07 01 07.699206000   16.1   16.9   DO 20 0
9 LAWD 87 WD* 21 32 16.2327040616 +00 15 14.399267982 13.717 14.634 14.674 14.675 14.676 DB4 195 1
10 EGGR 264 WD* 23 19 35.3881861344 -17 05 28.465573380 13.279 14.132 14.111 14.07 14.049 DB3 131 0

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