Monitoring of SSS130101:122222-311525
Mar 21, 2013:
The object is wobbling around V=17.7. The variability is quite strong, and the period of primary modulation is nearly the same, ~110.6 min. However, recently a new, longer variability has appeared. It produced a relatively strong peak in the power spectrum. The period of this modulation is ~203.7 min.
Mar 12, 2013:
We have proceeded with time-resolved photometric observations. It seems the system has reached its quiescent level even though a quite strong night to night variability is observed. The modulation is still strong, but its behaviour is now more complex. Nevertheless, the period is nearly the same.
Mar 05, 2013:
The system is slowly fading: Vcur=17.50.
Feb 23, 2013:
The system is slowly fading: Vcur=17.18.
Feb 22, 2013:
The system is slowly fading: Vcur=17.10. (B-I)cur=1.2.
Feb 20, 2013:
The system is slowly fading: Vcur=16.89.
Feb 19, 2013:
The system is slowly fading: Vcur=16.79.
The modulation is very strong and non-sinusoidal, with amplitude of 0.4 mag. The current period of modulation determined between JD 2456337 and 2456344 is Pcur=110.56 min.
Feb 18, 2013:
The system is slowly fading: Vcur=16.68, (B-I)cur=1.04.
The modulation is very strong and non-sinusoidal, with amplitude of 0.4-0.5 mag.
Feb 17, 2013:
The system is slowly fading: Vcur=16.58, (B-I)cur=1.11.
The modulation is very strong and non-sinusoidal, with amplitude of 0.2-0.3 mag. The current period of modulation determined between JD 2456337 and 2456342 is Pcur=110.89 min.
Feb 16, 2013:
Vcur=16.38, (B-I)cur=1.10.
Feb 15, 2013:
The system has suddenly stopped fading! Vcur=16.09.
Feb 14, 2013:
The system is rapidly fading: Vcur=15.83, (B-I)cur=0.98.
Feb 13, 2013:
The system has begun a sharp decline: Vcur=14.48, (B-I)cur=0.29. Also, a double wave appeared in the light curve.
Feb 12, 2013:
The object is heading down but very slowly: Vcur=12.89+/-0.03, (B-I)cur=0.10
Feb 8, 2013:
The object is heading down but very slowly: Vcur=12.74+/-0.03, (B-I)cur=0.05
The period of modulation has shortened. The current period determined between JD 2456323 and 2456332 is Pcur=110.15 min.
The spectrum now is very different from what was observed by Tom Marsh (ATel#4704). All the Balmer lines except for Halpha and some HeI’s are in absorption with a weak emission core. Absorptions are red-shifted. It is interesting that HeII 4686 is rather strong and can be easily detected in emission. Halpha is in emission and double-peaked but is very weak, with the equivalent width of only ~2.6A.
Feb 1, 2013:
The object is still bright even though it is slowly declining: Vcur=12.49+/-0.03, (B-I)cur=-0.01
The current period of modulation Pcur=111.34 min.
Jan 31, 2013:
After a week of bad weather we took new data.
The object is still bright even though it is slowly declining: Vcur=12.45+/-0.03, (B-I)cur=-0.005
The current period of modulation Pcur=111.39 min.
Jan 23, 2013:
The object is still bright: Vcur=12.34+/-0.03, (B-I)cur=0.00
The current period of modulation Pcur=111.33 min.
Jan 22, 2013:
The object is still bright: Vcur=12.32+/-0.03, (B-I)cur=-0.004
The current period of modulation Pcur=120.73 min. However, today a strong 1-d alias appeared at 111.38 min.
Jan 20, 2013:
The object is still brightening and blueing: Vcur=12.24+/-0.03, (B-I)cur=-0.005
The current period of modulation Pcur=120.85 min.
Photometry of SSS130101:122222-311525
This entry was posted on Tuesday, March 12th, 2013 at 01:00 and is filed under Observations. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.