README web version of /home/usg/OPS/MTS/readme_xml/readme_79504100
Principal Investigator Email Address
Estimated Total Execution Time (hours, including overheads)
General Description
First Mass and Density Measurements of a Primitive B-type Asteroid
This is DDT proposal 279.C-5041 (PI Patricio Rojo). We seek to obtain
a minimum of 9 NACO S13 H-band images of Asteroid (702) Alauda and its
recently discovered companion (Rojo and Margot, IAU CBET 1016, 2007)
in August or September 2007 (the asteroid is rapidly becoming fainter
and the current conditions will not return until 2010). The goal is
to solve for the orbit of this binary system in order to provide the
first reliable mass and density estimates for this primitive class of
asteroids. Thank you for your help with these observations!
Please use the attached ephemeris file and to update the coordinates
and differential rates for this fast-moving object.
The proposal calls for a minimum of 9 OBs (or more if more can be
excuted in the three hours allocated) on 9 separate nights. Ideally
these will be consecutive nights, but that is not required. Please
execute the OB within an hour of transit if possible, and no more than
two hours from transit. A table of transit times (UT) and airmass
values at transit follows:
********************************************************************************
Date__(UT)__HR:MN R.A._(ICRF/J2000.0)_DEC dRA*cosD d(DEC)/dt a-mass APmag
********************************************************************************
2007-Oct-02 00:30 t 20 27 48.00 -03 32 19.1 1.13 -0.94 1.071 12.51
2007-Oct-03 00:30 t 20 27 51.79 -03 32 40.7 1.95 -0.85 1.072 12.52
2007-Oct-04 00:30 t 20 27 56.89 -03 32 59.9 2.77 -0.75 1.072 12.54
2007-Oct-05 00:20 t 20 28 03.26 -03 33 16.6 3.58 -0.64 1.071 12.55
2007-Oct-06 00:20 t 20 28 10.96 -03 33 30.8 4.40 -0.54 1.072 12.57
2007-Oct-07 00:10 t 20 28 19.89 -03 33 42.4 5.20 -0.42 1.071 12.58
2007-Oct-08 00:10 t 20 28 30.16 -03 33 51.3 6.00 -0.31 1.071 12.60
2007-Oct-09 00:10 t 20 28 41.70 -03 33 57.3 6.79 -0.18 1.072 12.61
Thank you.
Waiver Requests
Critical Observing Condition Constraints
Time-Critical Aspects
Please execute one OB per night, ideally on consecutive nights.
Please execute the OB within an hour of transit if possible, and no more than two
hours from transit.
Transit times are listed below:
********************************************************************************
Date__(UT)__HR:MN R.A._(ICRF/J2000.0)_DEC dRA*cosD d(DEC)/dt a-mass APmag
********************************************************************************
2007-Aug-08 04:40 t 20 55 30.69 -03 20 09.1 -34.05 3.11 1.074 11.65
2007-Aug-09 04:30 t 20 54 38.14 -03 18 57.5 -33.96 2.87 1.073 11.65
2007-Aug-10 04:30 t 20 53 45.39 -03 17 51.2 -33.83 2.63 1.074 11.65
2007-Aug-11 04:20 t 20 52 53.25 -03 16 51.0 -33.67 2.39 1.073 11.66
2007-Aug-12 04:20 t 20 52 01.01 -03 15 56.0 -33.48 2.16 1.074 11.67
2007-Aug-13 04:10 t 20 51 09.47 -03 15 06.8 -33.26 1.93 1.074 11.68
2007-Aug-14 04:10 t 20 50 17.94 -03 14 22.6 -33.00 1.72 1.074 11.69
2007-Aug-15 04:00 t 20 49 27.20 -03 13 43.8 -32.72 1.50 1.074 11.70
2007-Aug-16 04:00 t 20 48 36.58 -03 13 09.8 -32.41 1.30 1.074 11.71
2007-Aug-17 03:50 t 20 47 46.84 -03 12 40.9 -32.07 1.10 1.074 11.73
2007-Aug-18 03:50 t 20 46 57.30 -03 12 16.5 -31.70 0.90 1.074 11.74
2007-Aug-19 03:40 t 20 46 08.73 -03 11 56.9 -31.30 0.71 1.074 11.76
2007-Aug-20 03:40 t 20 45 20.46 -03 11 41.5 -30.87 0.53 1.074 11.77
2007-Aug-21 03:40 t 20 44 32.90 -03 11 30.4 -30.42 0.36 1.075 11.79
2007-Aug-22 03:30 t 20 43 46.41 -03 11 23.5 -29.95 0.19 1.074 11.80
2007-Aug-23 03:30 t 20 43 00.35 -03 11 20.5 -29.45 0.03 1.075 11.82
2007-Aug-24 03:20 t 20 42 15.44 -03 11 21.3 -28.93 -0.12 1.074 11.84
2007-Aug-25 03:20 t 20 41 31.05 -03 11 25.7 -28.39 -0.27 1.075 11.86
2007-Aug-26 03:10 t 20 40 47.86 -03 11 33.5 -27.82 -0.41 1.074 11.87
2007-Aug-27 03:10 t 20 40 05.27 -03 11 44.6 -27.24 -0.55 1.075 11.89
2007-Aug-28 03:00 t 20 39 23.93 -03 11 58.9 -26.64 -0.68 1.074 11.91
2007-Aug-29 03:00 t 20 38 43.26 -03 12 16.2 -26.01 -0.80 1.074 11.93
2007-Aug-30 02:50 t 20 38 03.89 -03 12 36.2 -25.38 -0.91 1.074 11.94
2007-Aug-31 02:50 t 20 37 25.26 -03 12 59.0 -24.72 -1.02 1.074 11.96
Special Execution Requirements
Experience at the telescope shows that with proper preparation this observing
sequence can be executed in 15 minutes including telescope preset and AO acquisition.
(For tips on how to execute this program in an efficient fashion, please refer
to http://www.astro.cornell.edu/~jlm/out/alauda/)
If you find it impossible to execute this OB in less than 20 minutes, please reduce
NDIT from 60 to whichever number will yield an execution time of 20 minutes, but
certainly no less than NDIT=36.
Thank you.
Special Calibration Information
ToO Information
ToO Activators List
Is this a Pre-imaging run ?
Pre-imaging Requirements
Source(s) of Pre-imaging
Pre-imaging sources not listed above
Do all your OBs comply with the instrument-specific requirements listed
on the instrument-specific Phase 2 web page ?
If this is a pre-imaging run, did you select PRE-IMAGING for the Observing
Category for each Observing Template ?
Do all your finding charts comply with both the general and instrument-specific
Phase 2 Web Pages ?
If you submitted OBs for standard stars, did you specify the magnitude
and spectral type of all standard stars in the OBs ?
Have you included OBs for any calibrations that you need but which are
not part of the Calibration Plan ?
If you are observing Moving Targets, have you attached suitable ephemeris
files to your OBs?
If you have preferences which OBs should be executed first, did you make
use of the User Priority field in the OBs ?
If this is a run that requires coordinated observations with other facilities,
did you give proper instructions in the Time-Critical Aspects Section ?
If you have PSF reference star OBs, do the names of those OBs begin with
PSF_ ?
If there are Finding Charts attached to your OBs, is the field-of-view
of at least one of these charts 2' x 2' (with clearly labelled field orientation)
?
Have you clearly marked and labelled your wavefront reference objects
R1, R2, R3, ... (as specified in the NAOS Preparation Software) on your Finding
Charts ?
Have you specified the magnitude of the brightest object in the field-of-view
for each OB ?
Are there objects in any of your fields (including standard stars) which
are brighter than the limits specified in the User Manual and on NACO web Pages
?
If the previous answer is yes, have you given a list of OBs and a justification
for the brightness limit violation in the general description field ?
Last creation of page: Tue Oct 6 15:40:20 2009
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