2019A&A...630A..92B


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.28CET05:42:21

2019A&A...630A..92B - Astronomy and Astrophysics, volume 630A, 92-92 (2019/10-1)

The Hubble Catalog of Variables (HCV).

BONANOS A.Z., YANG M., SOKOLOVSKY K.V., GAVRAS P., HATZIDIMITRIOU D., BELLAS-VELIDIS I., KAKALETRIS G., LENNON D.J., NOTA A., WHITE R.L., WHITMORE B.C., ANASTASIOU K.A., AREVALO M., ARVISET C., BAINES D., BUDAVARI T., CHARMANDARIS V., CHATZICHRISTODOULOU C., DIMAS E., DURAN J., GEORGANTOPOULOS I., KARAMPELAS A., LASKARIS N., LIANOU S., LIVANIS A., LUBOW S., MANOURAS G., MORETTI M.I., PARASKEVA E., POULIASIS E., REST A., SALGADO J., SONNENTRUCKER P., SPETSIERI Z.T., TAYLOR P. and TSINGANOS K.

Abstract (from CDS):


Aims. Over its lifetime and despite not being a survey telescope, the Hubble Space Telescope (HST) has obtained multi-epoch observations by multiple, diverse observing programs, providing the opportunity for a comprehensive variability search aiming to uncover new variables. We have therefore undertaken the task of creating a catalog of variable sources based on archival HST photometry. In particular, we have used version 3 of the Hubble Source Catalog (HSC), which relies on publicly available images obtained with the WFPC2, ACS, and WFC3 instruments onboard the HST.
Methods. We adopted magnitude-dependent thresholding in median absolute deviation (a robust measure of light curve scatter) combined with sophisticated preprocessing techniques and visual quality control to identify and validate variable sources observed by Hubble with the same instrument and filter combination five or more times.
Results. The Hubble Catalog of Variables (HCV) includes 84 428 candidate variable sources (out of 3.7 million HSC sources that were searched for variability) with V≤27mag; for 11115 of them the variability is detected in more than one filter. The data points in the light curves of the variables in the HCV catalog range from five to over 120 points (typically having less than ten points); the time baseline ranges from under a day to over 15 years; while ∼8% of all variables have amplitudes in excess of 1mag. Visual inspection performed on a subset of the candidate variables suggests that at least 80% of the candidate variables that passed our automated quality control are true variable sources rather than spurious detections resulting from blending, residual cosmic rays, and calibration errors. Conclusion. The HCV is the first, homogeneous catalog of variable sources created from the highly diverse, archival HST data and currently is the deepest catalog of variables available. The catalog includes variable stars in our Galaxy and nearby galaxies, as well as transients and variable active galactic nuclei. We expect that the catalog will be a valuable resource for the community. Possible uses include searches for new variable objects of a particular type for population analysis, detection of unique objects worthy of follow-up studies, identification of sources observed at other wavelengths, and photometric characterization of candidate progenitors of supernovae and other transients in nearby galaxies. The catalog is available to the community from the ESA Hubble Science Archive (eHST) at the European Space Astronomy Centre (ESAC) and the Mikulski Archive for Space Telescopes (MAST) at Space Telescope Science Institute (STScI).

Abstract Copyright: © ESO 2019

Journal keyword(s): stars: variables: general - galaxies: active - methods: statistical - methods: data analysis

VizieR on-line data: <Available at CDS (J/A+A/630/A92): tableb2.dat tableb3.dat>

Errata: erratum vol. 631, art. C3 (2019)

Status at CDS : Examining the need for a new acronym. // All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 27

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Number of rows : 27

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 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11202 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9697 1
3 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1121 2
4 NGC 1015 G 02 38 11.565 -01 19 07.02   12.8   12.4 12.5 ~ 96 0
5 ESO 357-28 IG 03 25 08.2 -36 21 51   13.80   12.91 13.7 ~ 84 0
6 NAME GOODS Southern Field reg 03 32 28.0 -27 48 30           ~ 1107 1
7 NGC 1425 EmG 03 42 11.4841820747 -29 53 36.192654761   11.61   11.6 10.9 ~ 187 0
8 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 102 0
9 NGC 1448 GiG 03 44 31.915 -44 38 41.38   11.46   10.24 10.9 ~ 230 0
10 NGC 1851 GlC 05 14 06.76 -40 02 47.6   8.80 7.23     ~ 1268 0
11 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1775 1
12 NGC 2442 LIN 07 36 23.842 -69 31 50.96 11.47 11.15 10.42 9.71 10.4 ~ 190 1
13 NAME Leo Dwarf Irregular Galaxy G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 553 0
14 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49   11.59 10.5     ~ 294 0
15 MCS J1149.5+2223 ClG 11 49 35.8 +22 23 55           ~ 342 0
16 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2170 3
17 SN 2012cg SN* 12 27 12.83 +09 25 13.2           SNIa 140 1
18 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6349 3
19 NGC 4535 H2G 12 34 20.310 +08 11 51.94   11.1       ~ 533 0
20 M 91 LIN 12 35 26.430 +14 29 46.75   14.63 13.57     ~ 534 0
21 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2600 2
22 NAME Extended Groth Strip reg 14 19 +52.8           ~ 607 0
23 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1702 0
24 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1821 1
25 NGC 7250 G 22 18 17.776 +40 33 44.66 13.18 13.22 12.58     ~ 90 1
26 NAME Local Group GrG ~ ~           ~ 7181 0
27 NAME Galactic Bulge reg ~ ~           ~ 3531 0

    Equat.    Gal    SGal    Ecl

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2021.02.28-05:42:21

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