2006 NGC 6811 Campaign
Contributors
David Trowbridge (TDW)
3537 Gylany Way
Greenbank, WA 98253
360-222-3379
[email protected]
Rebecca Jensen-Clem
Kirkland, WA
[email protected]
Observatory
Tinyblue Observatory
Greenbank WA
48º 4’ 54” N 122º 36’ 0” W
www.tinyblue.com
Equipment
Takahashi FSQ-106 at f/8 (4” refractor with 1.6x Extender-Q)
SBIG ST-7E CCD Camera with CFW-8 Filter Wheel
Bessell prescription for Johnson-Cousins filter set (SBIG)
Data Collection Methods





All images had the same target area with image center at: 19h 36m 26.65s +46d 16m
54.34s (Astrometry from TheSky; Image scale: 2.51 arcsecs/pixel).
Camera was inverted so that a reasonably bright guide star was positioned on the
secondary chip of the ST-7. This orientation resulted in images with North down and East
to the right.
Exposures of 60s each were autoguided using GSC 3556:453 (SAO 48644), a 7.34
magnitude star.
Images were taken using photometric B, V and R filters.
Exposures of NGC target area were interleaved with exposures of Landolt region SA
111-773 in order to determine transformation coefficients and atmospheric extinction
coefficients for all-sky photometry on selected nights (Aug 5, 27; Sep 3, 15, 23; Oct 4).
Image Processing and Photometry




Images were captured using CCDSoft v. 5.00.170 and reduced using darks and T-shirt
sky flats.
All-sky photometry was done using Single Star Photometry tool in AIP4Win v. 2.1.10
Light curves were generated using the Analyze Photometry tool in MaxIm DL v. 3.22.
Comp stars were selected from Arne Herndan’s data file ngc6811sro.dat.
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David Trowbridge (TDW)
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Wednesday, October 25, 2006
Contents of this CD
Reduced Images
Evening
Date
2-Aug-2006
5-Aug-2006
27-Aug-2006
3-Sep-2006
15-Sep-2006
Target
NGC 6811
NGC 6811
NGC 6811
SA 111-773
SA 111-773
SA 111-773
NGC 6811
NGC 6811
NGC 6811
SA 111-773
SA 111-773
SA 111-773
SA 111-773
SA 111-773
NGC 6811
NGC 6811
SA 111-773
SA 111-773
SA 111-773
NGC 6811
NGC 6811
NGC 6811
SA 111-773
SA 111-773
SA 111-773
NGC 6811
NGC 6811
NGC 6811
SA 111-773
Start
time*
(PDT)
22:08
22:18
22:30
21:57
22:10
22:18
22:49
23:00
23:09
01:01
01:09
01:17
23:14
23:21
23:42
23:50
23:45
23:58
00:08
00:37
00:49
01:13
20:43
20:55
21:05
22:28
22:38
22:47
23:12
End
time
(PDT)
22:49
22:56
11:04
22:07
22:15
22:24
23:00
23:08
23:34
01:07
01:15
01:23
23:21
23:28
00:03
00:10
23:56
00:04
00:18
00:47
00:57
01:23
20:53
21:01
21:12
22:36
22:46
22:56
23:21
Page 2
David Trowbridge (TDW)
Midpoint time
(UTC)
2006-08-03 05:28:30
2006-08-03 05:37:00
2006-08-03 05:47:00
2006-08-06 05:02:00
2006-08-06 05:12:30
2006-08-06 05:21:00
2006-08-06 05:54:30
2006-08-06 06:04:00
2006-08-06 06:21:30
2006-08-06 08:04:00
2006-08-06 08:12:00
2006-08-06 08:20:00
2006-08-28 06:17:30
2006-08-28 06:24:30
2006-08-28 06:52:30
2006-08-28 06:57:30
2006-09-04 06:49:30
2006-09-04 07:01:00
2006-09-04 07:13:00
2006-09-04 07:42:00
2006-09-04 07:53:00
2006-09-04 08:15:00
2006-09-16 03:48:00
2006-09-16 03:58:00
2006-09-16 04:07:30
2006-09-16 05:32:00
2006-09-16 05:42:00
2006-09-16 05:51:30
2006-09-16 06:16:30
JD 2450000+
2453950.728125
2453950.734028
2453950.740972
2453953.709722
2453953.717014
2453953.722917
2453953.746181
2453953.752778
2453953.764931
2453953.836111
2453953.841667
2453953.847222
2453975.762153
2453975.767014
2453975.786458
2453975.789931
2453982.784375
2453982.792361
2453982.800694
2453982.820833
2453982.828472
2453982.843750
2453994.658333
2453994.665278
2453994.671875
2453994.730556
2453994.737500
2453994.744097
2453994.761458
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Wednesday, October 25, 2006
Integra
tion
time
720s
840s
720s
360s
180s
300s
360s
360s
600s
240s
300s
300s
300s
240s
540s
540s
300s
300s
420s
480s
360s
480s
360s
300s
360s
420s
420s
360s
360s
File name
2006-08-02_NGC-6811_R.FIT
2006-08-02_NGC-6811_V.FIT
2006-08-02_NGC-6811_B.FIT
2006-08-05_SA111-773_R.FIT
2006-08-05_SA111-773_B.FIT
2006-08-05_SA111-773_V.FIT
2006-08-05_NGC-6811_R.FIT
2006-08-05_NGC-6811_B.FIT
2006-08-05_NGC-6811_V.FIT
2006-08-05_SA111-773(2)_R.FIT
2006-08-05_SA111-773(2)_B.FIT
2006-08-05_SA111-773(2)_V.FIT
2006-08-27_SA111-773_R.FIT
2006-08-27_SA111-773_V.FIT
2006-08-27_NGC-6811_V.FIT
2006-08-27_NGC-6811_R.FIT
2006-09-03_SA111-773_B.FIT
2006-09-03_SA111-773_V.FIT
2006-09-03_SA111-773_R.FIT
2006-09-03_NGC-6811_R.FIT
2006-09-03_NGC-6811_V.FIT
2006-09-03_NGC-6811_B.FIT
2006-09-15_SA111-773_R.FIT
2006-09-15_SA111-773_V.FIT
2006-09-15_SA111-773_B.FIT
2006-09-15_NGC-6811_R.FIT
2006-09-15_NGC-6811_V.FIT
2006-09-15_NGC-6811_B.FIT
2006-09-15_SA111-773(2)_R.FIT
23-Sep-2006
26-Sep-2006
4-Oct-2006
7-Oct-2006
SA 111-773
SA 111-773
NGC 6811
NGC 6811
NGC 6811
SA 111-773
SA 111-773
SA 111-773
NGC 6811
NGC 6811
NGC 6811
SA 111-773
SA 111-773
SA 111-773
NGC 6811
NGC 6811
NGC 6811
SA 111-773
SA 111-773
SA 111-773
NGC 6811
NGC 6811
NGC 6811
SA 111-773
SA 111-773
SA 111-773
NGC 6811
NGC 6811
NGC 6811
23:30
23:44
00:21
00:31
00:40
21:51
22:04
22:15
22:36
22:47
22:59
23:33
23:42
23:49
22:08
22:27
22:40
21:01
21:13
21:23
21:43
21:54
22:05
22:24
22:34
22:45
20:37
20:53
21:07
23:38
23:52
01:05
01:00
00:54
22:02
22:10
22:25
22:45
22:57
23:09
23:41
23:49
00:01
22:18
22:37
22:52
21:11
21:22
21:33
21:53
22:04
22:15
22:34
22:44
22:55
20:51
21:06
21:22
2006-09-16 06:34:00
2006-09-16 06:48:00
2006-09-16 07:43:00
2006-09-16 07:45:30
2006-09-16 07:47:00
2006-09-24 04:56:30
2006-09-24 05:07:00
2006-09-24 05:20:00
2006-09-24 05:40:30
2006-09-24 05:52:00
2006-09-24 06:04:00
2006-09-24 06:37:00
2006-09-24 06:45:30
2006-09-24 06:55:00
2006-09-27 05:13:00
2006-09-27 05:32:00
2006-09-27 05:46:00
2006-10-05 04:06:00
2006-10-05 04:17:30
2006-10-05 04:28:00
2006-10-05 04:48:00
2006-10-05 04:59:00
2006-10-05 05:10:00
2006-10-05 05:29:00
2006-10-05 05:39:00
2006-10-05 05:50:00
2006-10-08 03:44:00
2006-10-08 03:59:30
2006-10-08 04:14:30
2453994.773611
2453994.783333
2453994.821528
2453994.823264
2453994.824306
2454002.705903
2454002.713194
2454002.722222
2454002.736458
2454002.744444
2454002.752778
2454002.775694
2454002.781597
2454002.788194
2454005.717361
2454005.730556
2454005.740278
2454013.670833
2454013.678819
2454013.686111
2454013.700000
2454013.707639
2454013.715278
2454013.728472
2454013.735417
2454013.743056
2454016.655556
2454016.666319
2454016.676736
* Start time is file save time minus exposure time (of initial frame)
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Wednesday, October 25, 2006
420s
300s
600s
600s
600s
420s
240s
420s
360s
420s
420s
360s
300s
420s
480s
420s
540s
480s
420s
420s
420s
480s
480s
420s
420s
480s
660s
600s
660s
2006-09-15_SA111-773(2)_V.FIT
2006-09-15_SA111-773(2)_B.FIT
2006-09-15_NGC-6811(2)_B.FIT
2006-09-15_ NGC-6811 (2)_V.FIT
2006-09-15_NGC-6811(2)_R.FIT
2006-09-23_SA111-773_R.FIT
2006-09-23_SA111-773_V.FIT
2006-09-23_SA111-773_B.FIT
2006-09-23_NGC-6811_B.FIT
2006-09-23_NGC-6811_V.FIT
2006-09-23_NGC-6811_R.FIT
2006-09-23_SA111-773(2)_R.FIT
2006-09-23_SA111-773(2)_V.FIT
2006-09-23_SA111-773(2)_B.FIT
2006-09-26_NGC-6811_R.FIT
2006-09-26_NGC-6811_V.FIT
2006-09-26_NGC-6811_B.FIT
2006-10-04_SA111-773_R.FIT
2006-10-04_SA111-773_V.FIT
2006-10-04_SA111-773_B.FIT
2006-10-04_NGC-6811_B.FIT
2006-10-04_NGC-6811_V.FIT
2006-10-04_NGC-6811_R.FIT
2006-10-04_SA111-773(2)_R.FIT
2006-10-04_SA111-773(2)_V.FIT
2006-10-04_SA111-773(2)_B.FIT
2006-10-07_NGC-6811_V.FIT
2006-10-07_NGC-6811_R.FIT
2006-10-07_NGC-6811_B.FIT
All-Sky Photometry Data
The following photometry data was obtained using the Single Star tool in AIP4Win, versions 1
and 2 and images of Landolt region SA 111-773 interspersed with RVB images of the NGC-6811
target region.
Aug 5
Determination of Coefficients 2006-08-05.xls
Aug 26
Determination of Coefficients 2006-08-26.xls
NGC-6811 Campaign 2006-08-27.xls
Sep 15
NGC 6811 Photometry 2006-09-15.doc
Determination of Coefficients 2006-09-15.xls
Atmos Extinction Coefficient_2006-09-15.xls
NGC-6811 Campaign 2006-09-15.xls
Sep 23
NGC 6811 Photometry 2006-09-23.doc
Determination of Coefficients 2006-09-23.xls
Atmos Extinction Coefficient_2006-09-23.xls
NGC-6811 Campaign 2006-09-23.xls
Oct 4
NGC 6811 Photometry 2006-10-04.doc
Determination of Coefficients 2006-10-04.xls
Atmos Extinction Coefficient_2006-10-04.xls
NGC-6811 Campaign 2006-10-04.xls
Transmission_Coefficients_Summary.xls
All-Sky vs Comp.xls
Light Curves
The following data was obtained using the Analyze Photometry tool in MaxIm DL v. 3.22 and
using Comp Stars from the All-Sky photometry dataset prepared by Arne Herndon.
AAVSO Suspected Variables.xls
Other Bright Stars.xls
Other Dimmer Stars.xls
Potential Variables.xls
These are the AAVSO stars that fall within the
target frame. They include V01, V02, V03,
V04, V05, V06, V08 and CTM CYG.
Includes NSV 12196 and other relatively
bright stars in the frame (magnitude 8-11)
Sixteen other stars in the frame to be checked
for variability
Two stars with evidence for variability,
compared with three nearby comp stars of
comparable magnitude.
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David Trowbridge (TDW)
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Wednesday, October 25, 2006