12118( 10) - 07-Jun-2010 19:37:31 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12118 Version: 10 Check-in Time: 07-Jun-2010 19:37:31 STScI Edit Number: 0 Title PTF10fqs: A Luminous Red Nova in the Spiral Messier 99 ------------------------------------------------------------------------------------ Type Cycle GO/DD 17 ------------------------------------------------------------------------------------ Investigators Contact? PI: Ms. Mansi Kasliwal California Institute of Technology CoI: Prof. Shrinivas R. Kulkarni California Institute of Technology N CoI: Dr. Howard E. Bond Space Telescope Science Institute N CoI: Dr. Luigi R. Bedin Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract The Palomar Transient Factory (PTF) has discovered a rare type of transient in the luminosity "gap'' between novae and supernovae. Located in a spiral arm of Messier 99, PTF10fqs is very red (effective temperature 3500 K) and slowly evolving. The spectrum is dominated by intermediate-width H-alpha (680 km/s) and calcium lines. The explosion signature is similar to M85 OT2006-1, SN 2008S and NGC 300-OT2008. The origin of these events is shrouded in mystery and controversy (and in some cases, in dust). Here, we propose a single-orbit observation to derive a precise astrometric position of this transient while it is still bright. This would allow us to firmly tie this HST observation with future searches of any remnant and serve as legacy observation for this rare and interesting source. ------------------------------------------------------------------------------------ Observations Description ------------------------ We request a single orbit with 6x358s exposures -- two exposures in each of the F390W, F606W, and F814W filters of WFC3. The pointings will be dithered in order to cover the chip gap. We specify an ORIENT range that assures that the target will not lie near the chip gap nor the chip edges. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12118( 10) - 07-Jun-2010 19:37:31 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 4 PTF10FQS EXT-STAR, EJECTA, RA=12H18M56.2000S +/- 0.1", J2000 V = 20 EMISSION LINE STAR, DEC=+14D26'7.00" +/- 0.1" IRREGULAR VARIABLE, LUMINOUS BLUE VARIABLE, NOVA-LIKE Reference Frame: ICRS Comments: The target is at 12:18:50.082 +14:26:39.75. However, there are no guide stars available at that pointing, so we are pointing east and south of the target in order to obtain a single guide star. ------------------------------------------------------------------------------------------------------------------------------------ 12118( 10) - 07-Jun-2010 19:37:31 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 2.400 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.754 Angle_Between_Sides Center_Pattern YES Pattern_Comments: Purpose of this pattern is to bridge the gap between the WFC3 chips. ------------------------------------------------------------------------------------------------------------------------------------ 12118( 10) - 07-Jun-2010 19:37:31 - [ 4] Visit: 04 Visit Requirements: ORIENT 108D TO 108 D; BEFORE 15-JUL-2010:00:00:00 On Hold Comments: Additional Comments: ORIENT range assures that the target will not lie near the WFC3 chip gap or too close to the chip edge. BEFORE date assures that observation will be made while the optical transient is still bright. However, the earliest possible observation is the most desirable. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PTF10FQS WFC3/UVI ACCUM UVIS-CENT F390W CR-SPLIT=NO 1 370 S GS ACQ SCENARIO ONEB1B3; S ER see below PATTERN 1 1-3 ------------------------------------------------------------------------------------------------------------------------------------ 2 PTF10FQS WFC3/UVI ACCUM UVIS-CENT F606W CR-SPLIT=NO 1 370 S S ER see below ------------------------------------------------------------------------------------------------------------------------------------ 3 PTF10FQS WFC3/UVI ACCUM UVIS-CENT F814W CR-SPLIT=NO 1 370 S S ER see below ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ PTF10FQS 1 WFC3/UVI ACCUM UVIS-CEN F390W 1 none none none 1 374.0 S S TER PTF10FQS 1 WFC3/UVI ACCUM UVIS-CEN F390W 2 none none none 1 374.0 S S TER PTF10FQS 2 WFC3/UVI ACCUM UVIS-CEN F606W 1 none none none 1 374.0 S S TER PTF10FQS 2 WFC3/UVI ACCUM UVIS-CEN F606W 2 none none none 1 374.0 S S TER PTF10FQS 3 WFC3/UVI ACCUM UVIS-CEN F814W 1 none none none 1 374.0 S S TER PTF10FQS 3 WFC3/UVI ACCUM UVIS-CEN F814W 2 none none none 1 374.0 S S TER 12118( 10) - 07-Jun-2010 19:37:31 - [ 5] Summary Form for Proposal 12118 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS-CENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BEFORE 15-JUL-2010:00:00:00, GS ACQ SCENARIO ONEB1B3, ORIENT 108D TO 108 D, PATTERN 1 1-3 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F390W, F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names PTF10FQS ------------------------------------------------------------------------------------------------------------------------------------