2021AJ....161....4Y


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.16CEST21:43:55

2021AJ....161....4Y - Astron. J., 161, 4-4 (2021/January-0)

On the compatibility of ground-based and space-based data: WASP-96 b, an example.

YIP K.H., CHANGEAT Q., EDWARDS B., MORVAN M., CHUBB K.L., TSIARAS A., WALDMANN I.P. and TINETTI G.

Abstract (from CDS):

The study of exoplanetary atmospheres relies on detecting minute changes in the transit depth at different wavelengths. To date, a number of ground- and space-based instruments have been used to obtain transmission spectra of exoplanets in different spectral bands. One common practice is to combine observations from different instruments in order to achieve a broader wavelength coverage. We present here two inconsistent observations of WASP-96 b, one by the Hubble Space Telescope (HST) and the other by the Very Large Telescope (VLT). We present two key findings in our investigation: (1) a strong water signature is detected via the HST WFC3 observations and (2) a notable offset in transit depth (>1100 ppm) can be seen when the ground-based and space-based observations are combined. The discrepancy raises the question of whether observations from different instruments could indeed be combined. We attempt to align the observations by including an additional parameter in our retrieval studies but are unable to definitively ascertain that the aligned observations are indeed compatible. The case of WASP-96 b signals that compatibility of instruments should not be assumed. While wavelength overlaps between instruments can help, it should be noted that combining data sets remains risky business. The difficulty of combining observations also strengthens the need for next-generation instruments that possess broader spectral coverage.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Exoplanet atmospheres - Exoplanet atmospheric composition - Observational astronomy - Bayesian statistics

Simbad objects: 22

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Number of rows : 22

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 WASP-96b Pl 00 04 11.1376733184 -47 21 38.322931111           ~ 23 0
2 WASP-96 * 00 04 11.1376733184 -47 21 38.322931111     12.2     G8 12 0
3 CPD-64 484b Pl 05 48 33.5937810570 -63 59 18.386834103           ~ 36 1
4 CD-38 2551b Pl 06 17 20.7486066719 -38 19 23.754191460           ~ 29 1
5 CPD-23 1329b Pl 06 33 24.2672798716 -23 29 10.296975033           ~ 24 0
6 HD 97658b Pl 11 14 33.1613362847 +25 42 37.391912066           ~ 145 1
7 WASP-31b Pl 11 17 45.3578468391 -19 03 17.216528280           ~ 97 1
8 HAT-P-3b Pl 13 44 22.5939154049 +48 01 43.206257583           ~ 74 1
9 HAT-P-12b Pl 13 57 33.4668502171 +43 29 36.602501754           ~ 137 1
10 WASP-39b Pl 14 29 18.4151765921 -03 26 40.203046112           ~ 107 1
11 WASP-103b Pl 16 37 15.5753608801 +07 11 00.119024745           ~ 108 1
12 WASP-67b Pl 19 42 58.5217085119 -19 56 58.523005452           ~ 39 1
13 Kepler-51b Pl 19 45 55.1429734720 +49 56 15.650638630           ~ 61 1
14 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1168 1
15 BD-01 3943b Pl 20 18 09.3209296034 -01 04 32.610392746           ~ 20 0
16 BD-05 5432b Pl 21 00 06.1969250596 -05 05 40.037007561           ~ 61 1
17 HAT-P-17b Pl 21 38 08.7311406378 +30 29 19.445574063           ~ 60 1
18 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1568 1
19 NAME BD+37 4734Bb Pl 22 57 46.8443014981 +38 40 30.355384717           ~ 209 1
20 WASP-6b Pl 23 12 37.7368657624 -22 40 26.277489164           ~ 106 1
21 WASP-52 * 23 13 58.7575814237 +08 45 40.571306719   12.9 12.0 12.03   K2V 50 1
22 WASP-52b Pl 23 13 58.7575814237 +08 45 40.571306719           ~ 66 1

    Equat.    Gal    SGal    Ecl

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2021.05.16-21:43:55

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