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21 Cataclysmic variables to be observed by William Herschel Telescope

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發表於 2016-12-13 11:59:06 | 顯示全部樓層 |閱讀模式
[size=13.3333px]AAVSO Alert Notice 564

[size=13.3333px]December 12, 2016

[size=13.3333px]21 Cataclysmic variables to be observed by William Herschel Telescope

[size=13.3333px]Roque Ruiz-Carmona (Ph.D. candidate, Institute of Mathematics,
[size=13.3333px]Astrophysics and Particle Physics, Radboud University Nijmegen,
[size=13.3333px]The Netherlands) has requested AAVSO assistance with his campaign
[size=13.3333px]to observe a set of 21 cataclysmic variables (CVs) with the
[size=13.3333px]William Herschel Telescope (WHT) at La Palma on **2016 December 16**.
[size=13.3333px]This campaign is essentially identical in format to the ones
[size=13.3333px]successfully carried out by the AAVSO on his behalf in 2015 and in
[size=13.3333px]May 2016 (AAVSO Alert Notices 524, 527, 543).

[size=13.3333px]Ruiz-Carmona writes: "As the end of my PhD is closer now, this is
[size=13.3333px]the second-to-last campaign monitoring CVs into outburst. As an
[size=13.3333px]update on my research, it seems that unexpectedly spiral density
[size=13.3333px]waves can only be detectable in high inclination systems and it
[size=13.3333px]seems that the luminosity of the disk in outburst outshines the
[size=13.3333px]spiral pattern for the rest of the system. This can also have deep
[size=13.3333px]implications: it can be that the spiral density waves are only an
[size=13.3333px]effect of the atmospheres of the disks and are therefore unrelated
[size=13.3333px]to transport of matter and angular momentum in the disks. In order
[size=13.3333px]to investigate this hypothesis, the sample of CVs I would like to
[size=13.3333px]monitor contains only eclipsing systems.

[size=13.3333px]"[As before,] I just need to know if the targets are in outburst
[size=13.3333px]or not. Even non detection can be useful, because it means that
[size=13.3333px]the systems are in quiescence. I prefer R filter but anything will
[size=13.3333px]do (even no filter)..."

[size=13.3333px]The PI has requested AAVSO observers to obtain one image of each
[size=13.3333px]target on each of TWO separate nights so he may analyze them to
[size=13.3333px]determine the final observing list for WHT.

[size=13.3333px]One image of every target should be obtained:

[size=13.3333px] - between 14 December 15:00 UT and 15 December 15:00 UT
[size=13.3333px] - between 15 December 15:00 UT and 16 December 15:00 UT

[size=13.3333px]***The images must be posted to the thread on the AAVSO Campaigns
[size=13.3333px]forum no later than December 16 16:00 UT.***

[size=13.3333px]Observers should post their images to the thread ("21 PTF CVs
[size=13.3333px]campaign") in the AAVSO Campaigns & Observation Reports forum
[size=13.3333px]([size=13.3333px]https://www.aavso.org/content/21-ptf-cvs-campaign[size=13.3333px]), and include
[size=13.3333px]the date/time, filter, and exposure in the posting. Raw or reduced
[size=13.3333px]images of each target may be posted on the forum. It is not
[size=13.3333px]necessary for observers to determine and submit a magnitude
[size=13.3333px]estimate of each target.

[size=13.3333px]**Only one image per observer per target per night should be
[size=13.3333px]submitted. Please do not submit multiple images of any target
[size=13.3333px]obtained by you on the same night.**

[size=13.3333px]An observer does not have to take images of the same targets on both
[size=13.3333px]nights (although that would be ideal); if conditions change between
[size=13.3333px]nights, whatever images can be obtained will be extremely helpful.

[size=13.3333px]The table of targets is given below. Some of the targets are quite
[size=13.3333px]faint, and stacking of images may be necessary. The maximum size of
[size=13.3333px]an image file that can be uploaded to the Forum thread is 40 MB,
[size=13.3333px]so if any files are larger, please trim the image(s).

[size=13.3333px]                                                                                           AAVSO
[size=13.3333px]PTF name    Primary name (VSX)             RA (2000)    DEC (2000)       PTF  Outburst   Photometry    Type   Priority
[size=13.3333px]                                                                       Ref mag  mag      Min    Max
[size=13.3333px]PTFS1523ak  ASASSN-15nv                    23:42:26.22  +32:48:19.80   17.07   17.00   19.6 CV  15.3 V  UG+E    Medium
[size=13.3333px]PTFS1500w   2MASS J00353571+4623524        00:35:35.70  +46:23:53.10   15.66   15.0    18.5 V   14.5 V  UG+E    High
[size=13.3333px]PTFS1500bs  2MASS J00382703+2509250        00:38:27.00  +25:09:25.10   18.82   18.5    18.6 CR  14.6 CR UGSU    Medium
[size=13.3333px]HT Cas      1RXS J011013.6+600431          01:10:13.00  +60:04:36.10   19.00   ----    19.3 V   12.6 V  UGSU+E  Medium
[size=13.3333px]PTFS1501br  CSS 081220:011614+092216       01:16:13.80  +09:22:16.10   18.86   17.5    19.0 CV  16.1 CV UG+E    High
[size=13.3333px]PTFS1201n   AY Psc                         01:36:55.46  +07:16:29.20   15.40   14.5    17.4 CR  14.4 CR UGZ+E   High
[size=13.3333px]PTFS1402x   ASASSN-15bu                    02:54:43.76  +22:44:02.2    17.89   17.0    19.7 CV  15.1 CV UGSU+E  Medium
[size=13.3333px]PTFS1504k   LT Eri                         04:07:14.80  -06:44:25.10   16.66   15.3    18.7 V   15.0 V  UG+E    Medium
[size=13.3333px]PTFS1604m   MASTER OT J042609.34+354144.8  04:26:09.30  +35:41:45.10   16.10   15.4    16.5 CV  12.7 CR UGSU    High
[size=13.3333px]PTFS1204h   CSS 100218:043829+004016       04:38:29.10  +00:40:17.10   19.20   17.5    19.0 CV  16.4 CV UG+E    Medium
[size=13.3333px]PTFS1606dc  CW Mon                         06:36:54.50  +00:02:17.30   15.15   13.7    17.2 V   11.9 V  UGSS    High
[size=13.3333px]PTFS1507o   U Gem                          07:55:05.30  +22:00:06.10   14.19   13.9    14.9 V    8.2 V  UGSS+E  High
[size=13.3333px]PTFS1508bh  CSS 080306:082655-000733       08:26:54.70  -00:07:33.10   19.87   16.00   20.0 CV  16.4 CV UG+E    High
[size=13.3333px]PTFS1509n   PU UMa                         09:01:03.90  +48:09:11.10   19.87   15.90   21.0 CR  15.4 CR UGSU+E  High
[size=13.3333px]PTFS1109e   GY Cnc                         09:09:50.60  +18:49:47.10   16.31   15.5    17.8 V   12.5 V  UG+E    Medium
[size=13.3333px]AR Cnc      SDSS J092207.56+310314.4       09:22:07.50  +31:03:15.10   18.70   ----    18.7 V   15.3 V  UG+EA   Medium
[size=13.3333px]PTFS1609t   SDSS J093249.57+472523.0       09:32:49.60  +47:25:23.10   18.86   18.5    20.9 CV  14.9 CV UGSU+E  Medium
[size=13.3333px]PTFS1509ao  SDSS J094002.56+274942.0       09:40:02.60  +27:49:42.10   18.00   15.5    18.0 CR  14.6 CR UG      High
[size=13.3333px]PTFS1509as  DV UMa                         09:46:36.70  +44:46:45.10   18.44   18.0    19.8 B   14.0 B  UGSU+E  Medium
[size=13.3333px]PTFS1510aw  SDSS J100658.40+233724.4       10:06:58.40  +23:37:24.10   18.22   16.2    20.5 CV  14.7 V  UG+E    Medium
[size=13.3333px]PTFS1310as  IY UMa                         10:43:57.00  +58:07:33.10   17.32   15.0    18.9 V   13.0 V  UGSU+E  Medium

[size=13.3333px]Observers should use the charts supplied by the PI. PDF images of
[size=13.3333px]PTF (Palomar Transient Factory) close-up finder charts and two
[size=13.3333px]AAVSO charts containing the targets and offset stars chosen by the
[size=13.3333px]PI may be downloaded here:
[size=13.3333px]([size=13.3333px]https://www.aavso.org/sites/default/files/publications_files/alerts/FindingCharts_rruizc4.pdf[size=13.3333px]).

[size=13.3333px]Please note that there are two versions of the finding chart for
[size=13.3333px]PTFS1507o (U Gem).

[size=13.3333px]Please be sure that each image includes the offset stars, especially
[size=13.3333px]if you trim it so its size is less than 40MB.

[size=13.3333px]Because the windows for observation by AAVSO observers are
[size=13.3333px]relatively short and the target list is quite long, it is
[size=13.3333px]recommended that observers coordinate their observing plans so
[size=13.3333px]that all of the targets are covered on both nights if at all
[size=13.3333px]possible. Please use the forum thread given above to post what
[size=13.3333px]targets you plan to observe; if you see that more difficult targets
[size=13.3333px]are not being covered and you can observe them, your doing so would
[size=13.3333px]be greatly appreciated.


[size=13.3333px]This AAVSO Alert Notice was compiled by Elizabeth O. Waagen.

[size=13.3333px]----------------------------------
[size=13.3333px]SUBMIT OBSERVATIONS TO THE AAVSO

[size=13.3333px]Information on submitting observations to the AAVSO may be found at:
[size=13.3333px]https://www.aavso.org/webobs

[size=13.3333px]ALERT NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION

[size=13.3333px]An Alert Notice archive is available at the following URL:
[size=13.3333px]https://www.aavso.org/alert-notice-archive

[size=13.3333px]Subscribing and Unsubscribing may be done at the following URL:
[size=13.3333px]https://www.aavso.org/observation-notification#alertnotices

[size=13.3333px]-------------------------------------------------
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