emailaddress "alcione.mora@uam.es" EstimatedTime "8.5h" GeneralDescription ****************** "This a mosaic imaging run in filters J, H and Ks. The goal is to obtain deep 11.4'x11.4' 3x3 quadrants images, with the largest depth in the central part of the mosaic and the signal to noise decreasing as we move to the corners. The inner part of the target object (NGC 602) fits in a single quadrant of HAWK-I. The total science integration time available for each filter (J: 0.8h, H: 3.1h, Ks: 3.1h) will be splitted into five AutoJitter sequences (J: 5x0.16h, H: 5x0.62h, Ks: 5x0.62h). Each AutoJitter will be performed with the telescope pointing to a different offset position, in order to construct a mosaic. One AutoJitter sequence will have the object centered in the middle of the detector (i.e. in the center of the gap between the four quadrants), while each of the other four sequences will have the object centered in the middle of a different quadrant. One attached finding chart (mosaic.jpg) shows the arrangement proposed. The AutoJitter box width proposed is 30\" (two times the detector gap of 15\"), a full 3x3 quadrants 11.4'x11.4' image with no gaps can be reconstructed. The effective exposure time will be maximum in the central part of the image (where the core of NGC 602 should be) and will be progresively decrease as we move to the borders and corners of the image. Object coordinates (revised data): NGC 602 RA 1:29:25.61 DEC -73:33:38.5 J2000 Position angle: 0 deg Templates: Acquisition: HAWKI_img_acq_Preset.tsf Science: HAWKI_img_obs_AutoJitter.tsf, 30\" jitter box Std stars: HAWKI_cal_StandardStar.tsf (If needed) Observing blocks: We suggest that the five J AutoJitter sequences (5x0.16h) could be performed in the same observing block. We suggest that each of the five AutoJitter sequences for H and Ks (5x0.62h for filter) has its own observing block. Sky subtraction: The sky will be estimated with the AutoJitter filtering of the observed field, using the zones more distant from the nebulosity of the NGC 602 cluster. Standard stars: Even though time was requested in the proposal for the observation of standard stars, the new version of the HAWK-I manual says that the instrument calibration plan will provide photometric zero points for each observing night to the astronomers. If that is the case, no dedicated standard star observations are needed in this programme. If not (i.e., no zero points will be provided for free), we have selected the following two stars from the HAWK-I list of standars (those closer in RA to NGC 602): O RA (J2000) Dec K sem N J-H sem N H-K sem N FS 3 01 04 21.63 +04 13 36.0 12.823 (0.003) [ 7] -0.111 (0.003) [ 7] -0.089 (0.005) [ 8] FS 5 01 54 34.65 -06 46 00.4 12.339 (0.005) [ 8] 0.004 (0.002) [ 7] -0.005 (0.002) [ 8] Saturation and DITs: The brightest star in the whole 11.3'x11.3' mosaic is 2MASS 01301659-7335056 RA 01 30 16.60 DEC -73 35 05.7 J= 10.945 H= 10.170 Ks= 9.991 Using the HAWK-I ETC we obtain that the maximum DITs that avoid saturation of this star are: J~1s, H~0.5s and Ks~1s However, we are interested in going as deep as possible, so we propose using DITs that give background limited images, if observing a small amount (~15) of moderately saturated objects is acceptable by HAWK-I and does not generate problems such as persistence or memory of the detector. In any case, Objects fainter than J=13, H=12.5 and Ks=12 should not be saturated. Finding charts: Four finding charts are included, showing the target object as observed by DSS2-IR (I filter?) and 2MASS J, H and Ks. The 2MASS charts are 7.8'x10' in size, because the 2MASS server does not provide broader images to comply with the 10'x10' request in the HAWK-I manual. The DSS2-IR chart is 10'x10' in size (as requested) and is not aligned with the N-E axes, because the ESO DSS2-IR server provides tilted images. A circle shows the inner part of NGC 602 in each chart. In addition, a larger 15'x15' finding chart (mosaic.jpg) is provided. It shows the five field positions requested for the mosaic formation. Each of the five coloured boxes shows the full field of view of HAWK-I in one offset position. The underlying image is from DSS2-IR." #Enter Text Not greater than 8000 (characters) WaiverRequest "No Waiver Request was submitted" #Enter Text Not greater than 800 (characters) CriticalObservingConstraint *************************** "Seeing: It is the most important constraint and should be as low as possible. The Phase I requirement is 0.8\" in Ks. It assumes a seeing in V of 0.75\" and an airmass of 1.8. If the J and H images are taken at higher elevation (see airmass constraints below), the seeing requirements are: J: < 0.85\" H: < 0.80\" Ks: < 0.80\" Airmass: The airmass should not be greater than 1.8. However, as the object culmination height is low (42 deg above the horizon), the seeing requirements in J and H could be better fullfilled if they are observed at airmasses below 1.6. Sky transparency: Photometric Moon: No significative influence in HAWK-I" # TimeCriticalAspects "No time-critical aspects" SpecialExecutionRequirements "" SpecialCalibrationInfo "" TooInformation "" TooActivatorsList "" IsPreImaging "false" PreImagingRequirements "" SourcePreimaging "" PreImageOptions "" AllOBsComply "YES" # IsPreimagingRunQuestion "N/A" # AllFCsComply "YES" # IfStandardStar "YES" # includeCalib "N/A" # IfMovingTarget "N/A" # UserPriority "N/A" # IfCoordinatedObservations "N/A" # IfStandardStarTpl "YES" # IfSpecOffset "N/A" # IfDrawSlit "N/A" # IfBrightestStar "YES" # IfMoveToPixel "N/A" #