2019A&A...627A..54P


Query : 2019A&A...627A..54P

2019A&A...627A..54P - Astronomy and Astrophysics, volume 627A, 54-54 (2019/7-1)

Photometry of K2 Campaign 9 bulge data.

POLESKI R., PENNY M., GAUDI B.S., UDALSKI A., RANC C., BARENTSEN G. and GOULD A.

Abstract (from CDS):

In its Campaign 9, K2 observed dense regions toward the Galactic bulge in order to constrain the microlensing parallaxes and probe for free-floating planets. Photometric reduction of the K2 bulge data poses a significant challenge due to a combination of the very high stellar density, large pixels of the Kepler camera, and the pointing drift of the spacecraft. Here we present a new method to extract K2 photometry in dense stellar regions. We extended the Causal Pixel Model developed for less-crowded fields, first by using the pixel response function together with accurate astrometric grids, second by combining signals from a few pixels, and third by simultaneously fitting for an astrophysical model. We tested the method on two microlensing events and a long-period eclipsing binary. The extracted K2 photometry is an order of magnitude more precise than the photometry from other method.

Abstract Copyright: © ESO 2019

Journal keyword(s): gravitational lensing: micro - methods: observational - techniques: photometric

Nomenclature: Table 3: [PPG2019] NN (Nos 1-10).

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 [PPG2019] 4 * 17 59 07.580 -28 36 15.16     14.552   12.484 ~ 1 0
2 OGLE BLG-ECL-234840 EB* 17 59 42.9901500576 -28 24 38.906573940     16.428   13.753 ~ 3 0
3 [PPG2019] 7 * 18 03 14.890 -27 38 04.09     15.464   12.645 ~ 1 0
4 [PPG2019] 3 * 18 03 23.630 -26 57 12.35     16.033   12.573 ~ 1 0
5 [PPG2019] 9 * 18 03 58.430 -27 58 18.26     14.885   12.536 ~ 1 0
6 OGLE-2016-BLG-0795 * 18 04 00 +26 00.0           ~ 2 0
7 [PPG2019] 8 * 18 04 03.230 -27 50 52.66     16.569   12.642 ~ 1 0
8 [PPG2019] 6 * 18 04 51.970 -27 21 14.44     15.855   12.546 ~ 1 0
9 [PPG2019] 2 * 18 04 55.980 -27 06 46.37     14.990   12.396 ~ 1 0
10 MOA 2016-BLG-290 * 18 04 56.990 -28 37 40.35           ~ 4 0
11 [PPG2019] 5 * 18 05 09.360 -27 15 52.74     14.402   12.688 ~ 1 0
12 [PPG2019] 10 * 18 05 18.040 -27 58 09.62     15.400   12.414 ~ 1 0
13 OGLE-2016-BLG-0980 * 18 05 25.03 -28 00 20.1           ~ 2 0
14 [PPG2019] 1 * 18 06 07.660 -27 11 50.68     14.021   12.203 ~ 1 0
15 NAME Galactic Bulge reg ~ ~           ~ 4309 0

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