June 2013

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V0617 Sgr

Submitted by Michael J. Cook on Sat, 2013-06-08 22:36

Eclipsing "supersoft" source, probably with with a very fast change in orbital period.

VSX OID: 
28317
RA: 
18 07 50.9
DEC: 
-35 10 25.1
JD Last Observed: 
2440587.50000
Minimum Magnitude: 
15.60
Minimum Magnitude Band: 
V
Observations Required?: 
Yes

HS 1813+6122

Submitted by Michael J. Cook on Sat, 2013-06-08 22:30

A fascinating novalike star in Draco, about 15.3 mag. The light curve has shown periodic waves of greatly conflicting period in different years. We've never quite seen that behavior before. This star is not as flashy as the dwarf novae or novae.

VSX OID: 
133049
RA: 
18 14 29.8
DEC: 
+61 23 34.4
JD Last Observed: 
2456451.97906
Minimum Magnitude: 
16.40
Minimum Magnitude Band: 
V
Observations Required?: 
Yes
Time Series: 
2
Additional Instructions: 
If you a borealite who likes to set up your telescope in twilight and just let it run? If so, this is a good star for you.

V1033 Cas

Submitted by Michael J. Cook on Sat, 2013-06-08 22:27
VSX OID: 
226047
RA: 
00 22 57.6
DEC: 
+61 41 07.6
JD Last Observed: 
2456213.35520
Minimum Magnitude: 
16.90
Minimum Magnitude Band: 
V
Observations Required?: 
Yes
Time Series: 
2
Additional Instructions: 
Need only "pulse-timing" runs - just long enough to accurately define the phase of their pulses. Usually that means 1-2 hours are enough - assuming that the star is reasonably bright, the period reasonably short, and the amplitude reasonably high. For stars failing on one or more of these criteria, a tad longer would be nice. We especially seek beginning-and-end-of-observing-season time series. These observations are harder to get, but they nail down the cycle count between seasons, which allows derivation of the long-term (over many years) period change - which in turn permits measuring the accretion torque on the underlying magnetic white dwarf.

V0455 And

Submitted by Michael J. Cook on Sat, 2013-06-08 22:25
VSX OID: 
133572
RA: 
23 34 01.4
DEC: 
+39 21 40.
JD Last Observed: 
2456446.61300
Minimum Magnitude: 
16.50
Minimum Magnitude Band: 
V
Observations Required?: 
Yes
Time Series: 
2
Additional Instructions: 
Need only "pulse-timing" runs - just long enough to accurately define the phase of their pulses. Usually that means 1-2 hours are enough - assuming that the star is reasonably bright, the period reasonably short, and the amplitude reasonably high. For stars failing on one or more of these criteria, a tad longer would be nice. We especially seek beginning-and-end-of-observing-season time series. These observations are harder to get, but they nail down the cycle count between seasons, which allows derivation of the long-term (over many years) period change - which in turn permits measuring the accretion torque on the underlying magnetic white dwarf.

V2306 Cyg

Submitted by Michael J. Cook on Sat, 2013-06-08 22:23
VSX OID: 
13226
RA: 
19 58 14.5
DEC: 
+32 32 42.4
JD Last Observed: 
2456086.87457
Minimum Magnitude: 
15.70
Minimum Magnitude Band: 
R
Observations Required?: 
Yes
Time Series: 
2
Additional Instructions: 
Need only "pulse-timing" runs - just long enough to accurately define the phase of their pulses. Usually that means 1-2 hours are enough - assuming that the star is reasonably bright, the period reasonably short, and the amplitude reasonably high. For stars failing on one or more of these criteria, a tad longer would be nice. We especially seek beginning-and-end-of-observing-season time series. These observations are harder to get, but they nail down the cycle count between seasons, which allows derivation of the long-term (over many years) period change - which in turn permits measuring the accretion torque on the underlying magnetic white dwarf.

AO Psc

Submitted by Michael J. Cook on Sat, 2013-06-08 22:20
VSX OID: 
26464
RA: 
22 55 18
DEC: 
-03 10 40.0
JD Last Observed: 
2456294.56417
Minimum Magnitude: 
15.00
Minimum Magnitude Band: 
V
Observations Required?: 
Yes
Time Series: 
2
Additional Instructions: 
Need only "pulse-timing" runs - just long enough to accurately define the phase of their pulses. Usually that means 1-2 hours are enough - assuming that the star is reasonably bright, the period reasonably short, and the amplitude reasonably high. For stars failing on one or more of these criteria, a tad longer would be nice. We especially seek beginning-and-end-of-observing-season time series. These observations are harder to get, but they nail down the cycle count between seasons, which allows derivation of the long-term (over many years) period change - which in turn permits measuring the accretion torque on the underlying magnetic white dwarf.

FO Aqr

Submitted by Michael J. Cook on Sat, 2013-06-08 22:18
VSX OID: 
1023
RA: 
22 17 55.4
DEC: 
-08 21 03.8
JD Last Observed: 
2456444.84665
Minimum Magnitude: 
14.20
Minimum Magnitude Band: 
V
Observations Required?: 
Yes
Time Series: 
2
Additional Instructions: 
Need only "pulse-timing" runs - just long enough to accurately define the phase of their pulses. Usually that means 1-2 hours are enough - assuming that the star is reasonably bright, the period reasonably short, and the amplitude reasonably high. For stars failing on one or more of these criteria, a tad longer would be nice. We especially seek beginning-and-end-of-observing-season time series. These observations are harder to get, but they nail down the cycle count between seasons, which allows derivation of the long-term (over many years) period change - which in turn permits measuring the accretion torque on the underlying magnetic white dwarf.

CSS 130418:174033+414756

Submitted by Michael J. Cook on Sat, 2013-06-08 22:12

Another absolute glamor star. It has dived to 18th magnitude, but a good target if it rebounds

VSX OID: 
304995
RA: 
17 40 33.4
DEC: 
+41 47 56.1
JD Last Observed: 
2456451.57431
Minimum Magnitude: 
21.00
Minimum Magnitude Band: 
CV
Observations Required?: 
Yes

V1974 Cyg

Submitted by Michael J. Cook on Fri, 2013-06-07 15:55
VSX OID: 
12894
RA: 
20:30:31.6
DEC: 
+52:37:50.9
JD Last Observed: 
2456451.59800
Minimum Magnitude: 
17.50
Minimum Magnitude Band: 
V
Observations Required?: 
Yes
Time Series: 
5

V1494 Aql

Submitted by Michael J. Cook on Fri, 2013-06-07 15:47
VSX OID: 
2633
RA: 
19:23:05.3
DEC: 
+04:57:19.6
JD Last Observed: 
2455790.81384
Minimum Magnitude: 
17.10
Minimum Magnitude Band: 
V
Observations Required?: 
Yes
Time Series: 
5

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