README web version of /home/usg/OPS/MTS/readme_xml/readme_82507301

Principal Investigator Email Address

• Ted.Gull@nasa.gov

Estimated Total Execution Time (hours, including overheads)

• 0.7h

General Description

• This observing program is a direct connection to programms of earlier
   semesters
  070.D-0607A, 071.D-168A,072.D-0524A, 074.D-0141A, 077.D-0618A, 380.D-0036A and 
  381.D-0004 observing Eta Carinae. The spectra of Eta Car showed an
  unexpected development in January. Moreover RXTE monitoring showed that Eta
  Carinae recovered to high state beginning mid-February, four weeks early. This DD
   time
  has 5 runs (A,B,C,D,E) which we request to be spaced roughly equal intervals (approximately
   3 weeks) between early April until early July. Our science goal is to detect the
   reappearance
  of [Fe III], [Ar III], [Ne III], [S III] and determine what velocity components
   appear first.
  
  We are quite aware that the red arm is not available April 30 to June 12 as per
   the
  letter of acceptance. Should this availability extend to July 15 as suggested in
   the 
  84 manual, we request notification to change OB D and E to that of C.
  Our requested observations are as follow:
  OB A by April 7			red and blue arms
  OB B April 20 to 29		red and blue arms
  OB C May 15-25			blue arm only
  OB D June 13-20			red and blue arms (if red arm not available, revise to C)
  OB E June 28 - July 5		red and blue arms (if red arm not available, revise to C)
  
  In A, B, D and E we obtain full spectra of Eta Carinae and blue 437 of FOS4.
  In C we obtain 346 and 437 settings of Eta Carinae and blue 437 of FOS4.
  The special region (FOS4) within the nebula around Eta Car which shows the reflected
  stellar spectrum from the polar region and reveals higher mass loss. To peak up
   on the FOS4 position we are using an offset star, TR16-64, north-east of this position.
  
  A guide star and a finder chart for the guide star is given.
  The guide star's designation is U0300_10504917
  the position 10:45:12.898    -59:44:19.32   V about 12.1.
  
  Since the object is variable a S/N ratio cannot be given in advance.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• none

Time-Critical Aspects

• prefered to be executed 3 weeks after 282.D-5073(A)

Special Execution Requirements

• Since we expect flux and line profiles to change with time, it is important
  that a full setup (Dic1 and Dic2) is taken at least within the same night, 
  better right after each other.
  We are planning to observe Eta Car until July. At this time it will be harder 
  to observe the object because it rises less high above horizon.
  Due to these unusual observation times (in which the star
  is quite far off from its culmination) we will accept higher than
  usual air masses.

Special Calibration Information

• ---(Empty)---

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

Do all your OBs comply with the instrument-specific requirements listed
 on the instrument-specific Phase 2 web page ?

• YES

Do all your finding charts comply with both the general and instrument-specific
 Phase 2 Web Pages ?

• YES

If you submitted OBs for standard stars, did you specify the magnitude
 and spectral type of all standard stars in the OBs ?

• N/A

Have you specified the S/N ratio at given wavelength in the User Comments
 field of each OB?

• N/A

Have you included OBs for any calibrations that you need but which are
 not part of the Calibration Plan ?

• N/A

If you are observing Moving Targets, have you attached suitable ephemeris
 files to your OBs?

• N/A

If you have preferences which OBs should be executed first, did you make
 use of the User Priority field in the OBs ?

• N/A

If this is a run that requires coordinated observations with other facilities,
 did you give proper instructions in the Time-Critical Aspects Section ?

• N/A

If you need secondary guiding, are there suitable objects within 30 arcsec
 from your target ?

• N/A