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5171. Photometry of type IIn SN 2008am
ID:
ivo://CDS.VizieR/J/ApJ/729/143
Title:
Photometry of type IIn SN 2008am
Short Name:
J/ApJ/729/143
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present observations and interpretation of the Type IIn supernova SN 2008am discovered by the ROTSE Supernova Verification Project (RSVP). SN 2008am peaked at approximately -22.3mag at a redshift of z=0.2338, giving it a peak luminosity of ~3x10^44^erg/s and making it one of the most luminous supernovae ever observed. The host galaxy appears to be an SB1 of normal luminosity (M_r'_~-20) with metallicity Z~0.4Z_{sun}_. ROTSE upper limits and detections constrain the rise time to be ~34 days in the rest frame, significantly shorter than similar events, SN 2006gy and SN 2006tf. Photometric observations in the ultraviolet, optical, and infrared bands (J, H, Ks) constrain the spectral energy distribution evolution. We obtained six optical spectra of the supernova, five on the early decline from maximum light and a sixth nearly a year later plus a very late time spectrum (~2yr) of the host galaxy. The spectra of SN 2008am show strong Balmer-line and HeI5876 emission with intermediate widths (~25{AA}) in the first ~40 days after optical maximum.
5172. Photometry of type IIn SNe 2005ip and 2006jd
ID:
ivo://CDS.VizieR/J/ApJ/756/173
Title:
Photometry of type IIn SNe 2005ip and 2006jd
Short Name:
J/ApJ/756/173
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present an observational study of the Type IIn supernovae (SNe IIn) 2005ip and 2006jd. Broadband UV, optical, and near-IR photometry, and visual-wavelength spectroscopy of SN 2005ip complement and extend upon published observations to 6.5 years past discovery. Our observations of SN 2006jd extend from UV to mid-infrared wavelengths, and like SN 2005ip, are compared to reported X-ray measurements to understand the nature of the progenitor. Both objects display a number of similarities with the 1988Z-like subclass of SN IIn including (1) remarkably similar early- and late-phase optical spectra, (2) a variety of high-ionization coronal lines, (3) long-duration optical and near-IR emission, and (4) evidence of cold and warm dust components. However, diversity is apparent, including an unprecedented late-time r-band excess in SN 2006jd. The observed differences are attributed to differences between the mass-loss history of the progenitor stars. We conclude that the progenitor of SN 2006jd likely experienced a significant mass-loss event during its pre-SN evolution akin to the great 19th century eruption of {eta} Carinae. Contrarily, as advocated by Smith et al., the circumstellar environment of SN 2005ip is found to be more consistent with a clumpy wind progenitor.
5173. Photometry of UCM galaxies
ID:
ivo://CDS.VizieR/J/A+AS/141/409
Title:
Photometry of UCM galaxies
Short Name:
J/A+AS/141/409
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present Johnson B CCD photometry for the whole sample of galaxies of the Universidad Complutense de Madrid (UCM) Survey Lists I and II (Cat. <J/ApJS/95/387> and <J/ApJS/105/343>). They constitute a well-defined and complete sample of galaxies in the Local Universe with active star formation. The data refer to 191 S0 to Irr galaxies at an averaged redshift of 0.027, and complement the already published Gunn r, J and K photometries. (B-r) colours are also computed.
5174. Photometry of UCM galaxies. II.
ID:
ivo://CDS.VizieR/J/A+A/365/370
Title:
Photometry of UCM galaxies. II.
Short Name:
J/A+A/365/370
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present Johnson B surface photometry for the UCM Survey galaxies. One-dimensional bulge-disk decomposition is attempted, discussing on fitting functions and computational procedures. The results from this decomposition, jointly with concentration indices and an asymmetry coefficient, are employed to study the morphological properties of these galaxies. We also compare our results with the previous morphological classification established using Gunn r imaging data and with other samples of galaxies. No major statistical differences in morphology are found between red and blue data, although some characteristics such as size and luminosity concentration vary. We find a correlation between luminosity and size. Several parameters are used to segregate the objects according to their morphological type.
5175. 1990-1992 Photometry of UU Her
ID:
ivo://CDS.VizieR/J/A+A/275/484
Title:
1990-1992 Photometry of UU Her
Short Name:
J/A+A/275/484
Date:
21 Oct 2021
Publisher:
CDS
Description:
(no description available)
5176. Photometry of variable LQ Hya
ID:
ivo://CDS.VizieR/J/A+A/276/345
Title:
Photometry of variable LQ Hya
Short Name:
J/A+A/276/345
Date:
21 Oct 2021
Publisher:
CDS
Description:
(no description available)
5177. Photometry of variables in NGC 3370
ID:
ivo://CDS.VizieR/J/ApJ/627/579
Title:
Photometry of variables in NGC 3370
Short Name:
J/ApJ/627/579
Date:
21 Oct 2021
Publisher:
CDS
Description:
We report observations of two nearby Type Ia supernovae (SNe Ia) for which observations of Cepheid variables in the host galaxies have been obtained with the Hubble Space Telescope: SN 1994ae in NGC 3370 and SN 1998aq in NGC 3982. For NCG 3370, we used the Advanced Camera for Surveys to observe 64 Cepheids that yield a distance of 29 Mpc, the farthest direct measurement of Cepheids.
5178. Photometry of variable star candidates in M31
ID:
ivo://CDS.VizieR/J/ApJ/743/19
Title:
Photometry of variable star candidates in M31
Short Name:
J/ApJ/743/19
Date:
21 Oct 2021
Publisher:
CDS
Description:
Photometry in B, V (down to V~26mag) is presented for two 23'x23' fields of the Andromeda galaxy (M31) that were observed with the blue channel camera of the Large Binocular Telescope during the Science Demonstration Time. Each field covers an area of about 5.1x5.1kpc^2^ at the distance of M31 ({mu}_M31_~24.4mag), sampling, respectively, a northeast region close to the M31 giant stream (field S2) and an eastern portion of the halo in the direction of the galaxy minor axis (field H1). The stream field spans a region that includes Andromeda's disk and giant stream, and this is reflected in the complexity of the color-magnitude diagram of the field. One corner of the halo field also includes a portion of the giant stream. Even though these demonstration time data were obtained under non-optimal observing conditions, the B photometry, which was acquired in time-series mode, allowed us to identify 274 variable stars (among which 96 are bona fide and 31 are candidate RR Lyrae stars, 71 are Cepheids, and 16 are binary systems) by applying the image subtraction technique to the selected portions of the observed fields. Differential flux light curves were obtained for the vast majority of these variables. Our sample mainly includes pulsating stars that populate the instability strip from the Classical Cepheids down to the RR Lyrae stars, thus tracing the different stellar generations in these regions of M31 down to the horizontal branch of the oldest (t~10Gyr) component.
5179. Photometry of 105 variable stars from CSTAR
ID:
ivo://CDS.VizieR/J/AJ/149/50
Title:
Photometry of 105 variable stars from CSTAR
Short Name:
J/AJ/149/50
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Chinese Small Telescope ARray carried out high-cadence time-series observations of 27 square degrees centered on the South Celestial Pole during the Antarctic winter seasons of 2008-2010. Aperture photometry of the 2008 and 2010 i-band images resulted in the discovery of over 200 variable stars. Yearly servicing left the array defocused for the 2009 winter season, during which the system also suffered from intermittent frosting and power failures. Despite these technical issues, nearly 800000 useful images were obtained using g, r, and clear filters. We developed a combination of difference imaging and aperture photometry to compensate for the highly crowded, blended, and defocused frames. We present details of this approach, which may be useful for the analysis of time-series data from other small-aperture telescopes regardless of their image quality. Using this approach, we were able to recover 68 previously known variables and detected variability in 37 additional objects. We also have determined the observing statistics for Dome A during the 2009 winter season; we find the extinction due to clouds to be less than 0.1 and 0.4mag for 40% and 63% of the dark time, respectively.
5180. 2010 photometry of variable stars from Dome A
ID:
ivo://CDS.VizieR/J/AJ/146/139
Title:
2010 photometry of variable stars from Dome A
Short Name:
J/AJ/146/139
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present results from a season of observations with the Chinese Small Telescope ARray, obtained over 183 days of the 2010 Antarctic winter. We carried out high-cadence time-series aperture photometry of 9125 stars with i{<~}15.3mag located in a 23deg^2^ region centered on the south celestial pole. We identified 188 variable stars, including 67 new objects relative to our 2008 observations, thanks to broader synoptic coverage, a deeper magnitude limit, and a larger field of view. We used the photometric data set to derive site statistics from Dome A. Based on two years of observations, we find that extinction due to clouds at this site is less than 0.1 and 0.4mag during 45% and 75% of the dark time, respectively.