Observations of some VY Scl-type stars

Observations of some Nova-like stars Low states in dwarf novae

SW Sextantis objects programme Professional-Amateur Collaborations The M-1 Group is working with Pablo Rodríguez-Gil of ( IAC ) to coordinate observing campaigns.

Campaña de Observación de estrellas SW Sextantis ( Finalidad)

Búsqueda de estados en estrellas SW Sextantis (Pablo Rodríguez-Gil)

SEARCH FOR LOW STATES SW SEXTANTIS ( Pablo Rodríguez-Gil).

We present results from high speed photometry of nova-like variables VY Scl stars,UX UMa stars and SW Sextantis stars.Some nova-like are best known to show - low states - .or fading episodes.
In some systems, these low states occur very infrequentely- 400days. Such low states provide a unique opportunity to study the white-dwarf atmosphere. The duration between 300 and 400 days and depth > 2 mag are typical for VY Scl type fadings.

Nosotros presentamos observaciones de estrellas de tipo VY Scl, UX UMa y SW Sextantis. algunas de estas estrellas tardan más de 400dias en pasar a su fase de mínimo. Cuando alcanza esta fase es cuando se pueden estudiar mejor la atmósfera de la nova enana. La duración entre 300 y 400 días y su caída de luz de > 2 magnitudes es el comportamiento estándar en este tipo de estrellas.
References. T Kato (VSNET 2004) Greiner, 1998

Campaña Eclipses DW UMa

Curvas de Luz SW Sextantis

Stars	Notes	RA (2000)	Dec (2000)	Type	Eclipsing
PX And	Article	00 30 05.80	+26 17 26.7	SW Sextantis	Yes
HS0128+3547	Low state	01 31 26.7	+36 02 39.7	Probable
TT Tri HS 0129+2933	Article	01 31 59.80	+29 49 22.0	Probable	Yes
HS0139+0559	Article	01 41 39.8	+06 14 38	Probable
BO Cet	Article	02:06:39.27	-02:03:42.5	SW Sextantis	No
TT Arietis	Article	02 06 53.09	+15 17 43.0	Probable	No
HS-0220+0603	Low state (2005)	02 23 01.60	+06 16 51.7	Probable	Yes
WX Ari	Article	02 47 36.20	+10 35 38.8	SW Sextantis	Yes
KUV 03580+0614	Low state(2005)	04 00 37.25	+06 22 46.2	Probable	No
HS 0455+8315	Low state (2005)	05 06 48.50	+83 19 22.4	Probable	Yes
V363 Aur	Article	05 33 33.46	+36 59 32.5	SW Sextantis	Yes
FS Aur	Article	05 47 48.34	+28 35 11.1	Probable
LS Cam	Article	05 57 23.96	+72 41 52.4	Probable	No
LU Cam	Article	05:58:17.88	+67:53:46.4	Probable
MU Cam	Article	06:25:16.60	+73:34:38.4	Probable
BT Mon	Article	06 43 47.20	-02 01 14.5	SW Sextantis	Yes
HS0642+5049	Article	06:46:19.60	+50:45:48.0	Probable
HS0728+6738	Article	07 33 41.30	+67 32 14.8	SW Sextantis	Yes
SDSSJ075443+500729		07 54 43.01	+50 07 29.2	SW Sextantis	Yes
HT Cam	Article	07:57:01.37	+63:06:01.8	Probable
DW Cnc	Article	07:58:53.03	+16:16:45.2	Probable
HS0758+4019		08:02:15.20	+40:10:47.0	Probable
SDSS J080908	Article	08 09 08.39	+38 14 06.2		No
BH Lyn	Article	08 22 36.00	+51 05 24.8	SW Sextantis	Yes
AC Cnc		08:44:27.13	+12:52:32.0	Probable	Yes
BP Lyn	Article	09 03 08.87	+41 17 47.9	SW Sextantis	Yes
HS0943+1404	Low state (2007) Article	09:46:34.5	+13:50:58.1	Probable
LN UMa PG 1000+667	Article	10 04 34.69	+66 29 14.6	SW Sextantis	NO
SW Sex	Article	10 15 09.40	-03 08 33.5	SW Sextantis	Yes
DW UMa	Article	10 33 52.90	+58 46 54.9	SW Sextantis	Yes
SDSJ13272339		13 27 23.40	+65 28 54.2	Probable	Yes
LX Ser	Article	15 38 00.10	+18 52 03	Probable	Yes
CT Ser		15 45 38.9	+14 22 32	Probable
AP CrB HS1552+2730	Article	15 54 12.3	+27 21 51	Probable
HS1607+04	Article	16 10 07.4	+03 52 33
SDSSJ1607		16:07:45.02	+36:23:20.7	SW Sextantis	Yes
RXJ 1643.7 V1084 Her	Article	16 43 45.72	+34 02 40.2	Probable	No
V795 Her		17 12 56.09	+33 31 21.4	SW Sextantis	No
V442 Oph	Low state (2005) Article	17 32 51.1	-16 15 21.7	SW Sextantis	No
V380 Oph		17 50 13.6	+06 05 29	SW Sextantis	No
V533 Her		18 14 20.34	+41 51 21.3	SW Sextantis	No
HS 1813+6122		18 14 29.70	+61 23 35.2	Probable	No
MV Lyr	Low state (2007) Article	19 07 16.2	+44 01 07	VY Scl star
V1315 Aql		19 13 54.50	+12 18 03.2	SW Sextantis	Yes
NQ Vul	Low state (2007)	19 29 14.59	+20 27 59.6	Nova 1976
WY Sge		19 32 43.82	+17 44 55.9	Probable	Yes
V1776 Cyg		20 23 30.51	+46 31 29.7	Probable	Yes
V751 Cyg	Article	20:52:12.78	+44:19:26.1	Probable
LQ Peg	Article	21:36:19.12	+11:40:54.4	SW Sextantis	No
LS Peg	Article	21 51 57.94	+14 06 53.3	SW Sextantis	No
UU Aqr	Article	22 09 05.70	-03 46 17.7	SW Sextantis	Yes
CP Lac	Low state (2006) Article	22:15:41.09	+55:37:01.3	Probable	Yes
AO Psc	Article	22 55 17.99	-03 10 40.0	Probable	No

Low states Other VY Scl ,IP,AM, UX,NL - type stars

Stars	Notes	RA (2000)	Dec (2000)	Mag	Type
HV And	Light curve - Image	00:40:55.41	+43:24:59.4	16.07	nl
RW Tri	Image	02:25:36.16	+28:05:50.9	13.15	ux
HS0229+8016		02 35 58.0	+80 29 46	14.63	cv/nl
V1209 Tau	Image	03:43:13.84	+24:05:09.4	15.84	nl
OV Tau	Article	03:46:06.27	+29:41:14.8	14.60	nl
HS0506+77	Article	05:13:36.54	+77:28:42.8	14.98	vy
V1193 Ori	Article	05:16:26.67	-00:12:14.3	14.41	ux
KR Aur	Photometric Study	06:15:43.94	+28:35:08.4	13.54	vy Nova Aur 1960
BZ Cam	Article	06:29:34.00	+71:04:34.3	13.10	vy
V1082 Sgr	Article	19:07:21.87	-20:46:50.3	14.56	vy
V794 Aql	Article	20:17:33.92	-03:39:50.8	15.66	vy
V425 Cas	Article	23:03:46.63	+53:17:15.3	15.44	vy
OR And	Image	23:04:37.42	+49:27:23.9	14.81	nl
VY Scl	Article	23:29:00.45	-29:46:46.7	13.70	vy
RX J2337+4308	Image	23:37:59.22	+43:08:50.8	16.08	vy
VZ Scl	Article	23:50:09.24	-26:22:52.7	16.67	vy

The Big List of SW Sextantis Stars

CCD observations of old Novae Vigilancia de Novas viejas

Nova	Nova Outburst	RA (2000)	Dec (2000)	Mag
V Per	1887	02:01:53.92	+56:44:03.5	18.00
NSV 837	1873	02:29:37.09	+52:25:40.5	16.57
GK Per	1901	03:31:12.01	+43:54:15.4	12.92
QZ Aur	1964	05:28:34.01	+33:18:22.6	16.97
T Aur	1891	05:31:59.14	+30:26:45.0	15.50
V529 Ori	1667	05:58:20.16	+20:15:44.7	18.05
DM Gem	1903	06:44:12.14	+29:56:41.9	16.85
DN Gem	1912	06:54:54.40	+32:08:27.4	15.58
GI Mon	1918	07:26:47.10	+06:40:29.5	16.90
CT Ser	1948	15: 45: 38.97	+14:22:32.7	16.96
X Ser	1903	16:19:17.71	-02:29:30.0	16.91
V841 Oph	1848	16:59:30.37	-12:53:27.2	13.20
RS Oph	1898-1933 1958-1967 1985-2006	17:50:13.16	-06:42:28.5	11.90
DQ Her	1934	18:07:30.26	+45:51:32.1	14.61
FH Ser	1970	18:30:46.92	+02:36:51.5	17.00
CI Aql	1917 2000	18:52:03.59	-01:28:39.3	16.25
HR Lyr	1919	18:53:25.05	+29:13:37.8	15.72
V446 Her	1960	18:57: 21.51	+13.14: 29.9	16.71
V1494 Aql	1999	19:23:05.33	+04:57:19.0	16.92
V368 Aql	1936	19:26:34.41	+07:36: 13.6	17.16
NQ Vul	1976	19:29:14.72	+20:27:59.3	19.79
DO Aql	1925	19 31 25.87	-06 25 38.1	18.11
V476 Cyg	1920	19:58:24.57	+53:37: 07.1	17.00
V1330 Cyg	1970	20:52:44.83	+35:59:27.4	17.51
V1500 Cyg	1975	21:11:36.51	+48:09:02.8	19.32
Q Cyg	1876	21:41:43.93	+42:50:29.1	15.34
V1668 Cyg	1978	21:42:35.22	+44:01:54.9	19.07
Low state CP Lac	1935	22:15:41.09	+55:37:01.3	16.70
DK Lac	1950	22:49:46.97	+53 17 20	17.37
DI Lac	1910	22:35:48.60	+52:42:59.5	14.57
Os And	1986	23:12:05.95	+47:28:19.6	17.43

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