[vsnet-alert 22467] IRAS 03536+6235 - a new RCB variable at active state

Sat Sep 1 05:57:09 JST 2018

-------- Továbbított üzenet --------
Tárgy: [baavss-alert] IRAS 03536+6235 - a new RCB variable at active state
Dátum: Fri, 31 Aug 2018 22:35:02 +0200
Feladó: Gabriel Murawski libmar96 at gmail.com [baavss-alert] 
<baavss-alert at yahoogroups.com>

Gabriel Murawski identified a new RCB variable star in Camelopardalis 
using archive ASAS-SN data. Its type was suggested based on color 
indexes (2MASS, WISE) and light curve. In December 2016, IRAS 03536+6235 
started to brighten, reaching 14.3 mag at maximum after a few months, 
followed by another fade down to 16.2 mag in March 2018. Archive 
observations show more observed events (R=16.9; B=19.7 by USNO-A2.0; 
R1=20.0; I=17.8 by USNO-B1.0).  At current state, it keeps around 14.8 
mag in V. Latest observations by MGAB (G. Murawski), TRT (T. Tordai) and 
OCN (S. O’Connor) show a possible another fade.

Recent observations:

2018 Aug. 13.60033 - 14.840 V - ASAS-SN

2018 Aug. 18.60063 - 14.730 V - ASAS-SN

2018 Aug. 29.84900 - 14.735 V - MGAB

2018 Aug. 29.85900 - 13.656 R - MGAB

2018 Aug. 29.86600 - 12.327 I - MGAB

2018 Aug. 29.88000 - 16.709 B - MGAB

2018 Aug. 29.89200 - 14.782 V - MGAB

2018 Aug. 29.89900 - 13.632 R - MGAB

2018 Aug. 30.00500 - 14.856 V - TRT

2018 Aug. 30.91100 - 14.889 V - MGAB

2018 Aug. 31.51920 - 14.74 CV - OCN

2018 Aug. 31.52050 - 12.50 I - OCN

2018 Aug. 31.52190 - 14.96 V - OCN

Further photometric and spectroscopic observations are encouraged. If
possible, please use photometric filters, as the target is very red (B-V 
= 1.9, J-K = 3.3). The AAVSO chart for this target is X23211AJ (see link
below). Spectroscopic observations are required to confirm RCB type
(optical and NIR). Although target very faint (~15 mag), it’s worth to
obtain spectra now, as IRAS 03536+6235 is very likely to fade again soon.

Please report observations to AAVSO using this name.

VSX page: https://www.aavso.org/vsx/index.php?view=detail.top&oid=623572

ASAS-SN discovery light curve:
https://asas-sn.osu.edu/light_curves/909bcf67-3a86-4258-badc-2588aae3cbc3

AAVSO chart: https://www.aavso.org/apps/vsp/chart/X23211AJ.png

Regards,
Gabriel Murawski
libmar96 at gmail.com