16896( 3) - 21-Jun-2022 14:12:49 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16896 Version: 3 Check-in Time: 21-Jun-2022 14:12:49 STScI Edit Number: 1 Title XMM HST monitoring of the ultra soft Narrow Line Seyfert RX J1355.2+5612 ------------------------------------------------------------------------------------ Type Cycle GO 29 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Samuel Barnier IPAG (Institut de Plan|*|tologie et Y d'Astrophysique de Grenobl CoI: Dr. Pierre-Olivier Petrucci Institut de Planetologie et Y d'Astrophysique de Grenoble CoI: Prof. Stefano Bianchi Universita' degli Studi Roma Tre N CoI: Prof. Giorgio Matt Universita' degli Studi Roma Tre N CoI: Dr. Francesco Ursini Universita di Roma Tor Vergata N CoI: Mr. Riccardo Middei Universita' degli Studi Roma Tre N CoI: Dr. Maica Clavel IPAG (Institut de Planétologie et N d'Astrophysique de Grenobl CoI: Dr. Alessandra De Rosa INAF - Istituto di Astrofisica e N Planetologia Spaziali CoI: Dr. Massimo Cappi INAF-Osservatorio di Astrofisica e Scienza N dello Spazio CoI: Dr. Barbara De Marco Universitat Politecnica de Catalunya N ------------------------------------------------------------------------------------ Abstract Ultra soft Narrow Line Seyfert US-NLS are characterized by a large spectral variability, a very steep X-ray primary continuum Gamma> 2.5 and a strong soft excess. This remarkable spectral shape questions the origin of their broad-band UV-X-ray continuum compared to standard Seyfert galaxies. We propose to perform a monitoring composed of 5x26 ks XMM observations total: 130ks, spaced by 2-3 days and coordinated with HST, to probe the FUV, of the US-NLS RX J1355.2+5612. The HST COS data are crucial to provide the best constraints on the accretion disc temperature which is expected to be quite hot in these objects. The proposed monitoring will then allow us to 1) disentangle the different spectral components present from the UV/FUV to X-ray energy range and 2) investigate the nature of the soft X-ray excess and discriminate between the theoretical models that have been heavily discussed in the past decade. ------------------------------------------------------------------------------------ Observations Description ------------------------ This is a joint XMM / HST proposal to study the correlation between the X-ray and UV variability of an AGN on time scale of a few days. HST will provide an excellent picture of the FUV range and allow to constrain the accretion disc temperature. We have been granted 5 orbits of HST and 140 ks of XMM observation time. The plan is to observe our source (LEDA-2816068) 5 times quasi simultaneously with both XMM and HST: 5x (28 ks XMM observation + 1 orbit of HST). Strict simultaneity is not required, a shift of a few hours up to a day is acceptable given the expected variability. The XMM+HST observations should be separated by 3-4 days to catch the source at different levels of X-ray flux. 16896( 3) - 21-Jun-2022 14:12:49 - [ 2] We thus plan 5 visits, each composed of 1 orbit (total 5 orbits). Each visit is defined as: 1) a target acquisition exposure with COS / NUV in ACQ/IMAGE mode and MIRROR B + PSA. Given that the archival NUV flux (GALEX) is at the limit of the flux limits for MIRROR A + PSA. We use MIRROR B + PSA. We estimate the exposure time using the ETC run #1684797. For the ETC run, we use the lowest NUV archival flux (1.8e-15 erg/s/cm2/A at 2340 A, GALEX) to get a SNR of 25. This gives an exposure time of 40 s. 2) primary science exposure using COS / FUV with grating G140L at 1105 A, in TIME-TAG mode and the PSA. ETC run #1684832 : we use the maximum archival FUV flux (4e-15 erg/s/cm2/A at 1550 A, GALEX) for the simulation. We use FP-POS = ALL as it is recommended in the documentation. The ETC run gives a buffer fill time of 8277 s, following the decision tree of the documentation, we fix the buffer time to the exposure time of each FP-POS (BT = 509s) as the exact count rate of the source is not known. We auto-adjust the exposure time of the splits (different FP-POS exposure) using the corresponding orbit planner option. Timing requirements: Each visit should be as simultaneous as possible with the corresponding XMM observation. Strict simultaneity is not required, a shift of a few hours up to a day is acceptable. Each visit should be separated by 3-4 days from the precedent. Visit planner: The XMM visibility tool shows that the source will be visible to XMM from November 3rd 2022 to January 21st 2023. The HST visit planner shows two possible openings for the complete observational strategy: 1) from November 3rd 2022 to November 20th 2022 2) from December 22nd 2022 to January 10th 2023 Bright object tool : no warnings obtained with the current settings. ------------------------------------------------------------------------------------ 16896( 3) - 21-Jun-2022 14:12:49 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 LEDA-2816068 GALAXY, ACCRETION DISK, RA=13H55M16.5541S +/- 0.07", J2000 V = 17.09 CORONA, DISK, NUCLEUS, DEC=+56D12'44.63" +/- 0.06" SEYFERT Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 -3.32065120951953E-5 -2.0700006189144915E-4 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 16896( 3) - 21-Jun-2022 14:12:49 - [ 4] Visit: 01 Visit Requirements: BETWEEN 02-NOV-2022:00:00:00 AND 20-NOV-2022:00:00:00; BETWEEN 22-DEC-2022:00:00:00 AND 10-JAN-2023:00:00:00 On Hold Comments: Additional Comments: This is a joint XMM/HST monitoring of 5 observations spaced by 3-4 days accepted at the last XMM call. (proposal 90337) This observation must be as simltaneous as possible (<1 day) with the first XMM observation Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LEDA-281606 COS/NUV ACQ/IMA PSA MIRRORB 1 40 S (40 8 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 LEDA-281606 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=509, FP-POS=ALL 1 500 S 8 G see below (2036 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ LEDA-2816068 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 1 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 2 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 3 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 4 1 509.0 S G 16896( 3) - 21-Jun-2022 14:12:49 - [ 5] Visit: 02 Visit Requirements: AFTER 01 BY 3 D TO 4 D On Hold Comments: Additional Comments: This is a joint XMM/HST monitoring of 5 observations spaced by 3-4 days accepted at the last XMM call. (proposal 90337) This observation must be as simltaneous as possible (<1 day) with the second XMM observation Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LEDA-281606 COS/NUV ACQ/IMA PSA MIRRORB 1 40 S (40 8 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 LEDA-281606 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=509, FP-POS=ALL 1 500 S 8 G see below (2036 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ LEDA-2816068 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 1 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 2 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 3 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 4 1 509.0 S G 16896( 3) - 21-Jun-2022 14:12:49 - [ 6] Visit: 03 Visit Requirements: AFTER 02 BY 3 D TO 4 D On Hold Comments: Additional Comments: This is a joint XMM/HST monitoring of 5 observations spaced by 3-4 days accepted at the last XMM call. (proposal 90337) This observation must be as simltaneous as possible (<1 day) with the third XMM observation Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LEDA-281606 COS/NUV ACQ/IMA PSA MIRRORB 1 40 S (40 8 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 LEDA-281606 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=509, FP-POS=ALL 1 500 S 8 G see below (2036 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ LEDA-2816068 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 1 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 2 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 3 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 4 1 509.0 S G 16896( 3) - 21-Jun-2022 14:12:49 - [ 7] Visit: 04 Visit Requirements: AFTER 03 BY 3 D TO 4 D On Hold Comments: Additional Comments: This is a joint XMM/HST monitoring of 5 observations spaced by 3-4 days accepted at the last XMM call. (proposal 90337) This observation must be as simltaneous as possible (<1 day) with the fourth XMM observation Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LEDA-281606 COS/NUV ACQ/IMA PSA MIRRORB 1 40 S (40 8 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 LEDA-281606 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=509, FP-POS=ALL 1 500 S 8 G see below (2036 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ LEDA-2816068 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 1 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 2 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 3 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 4 1 509.0 S G 16896( 3) - 21-Jun-2022 14:12:49 - [ 8] Visit: 05 Visit Requirements: AFTER 04 BY 3 D TO 4 D On Hold Comments: Additional Comments: This is a joint XMM/HST monitoring of 5 observations spaced by 3-4 days accepted at the last XMM call. (proposal 90337) This observation must be as simltaneous as possible (<1 day) with the fifth XMM observation Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LEDA-281606 COS/NUV ACQ/IMA PSA MIRRORB 1 40 S (40 8 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 LEDA-281606 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=509, FP-POS=ALL 1 500 S 8 G see below (2036 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ LEDA-2816068 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 1 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 2 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 3 1 509.0 S G LEDA-2816068 2 COS/FUV TIME-TA PSA G140L 1105 none none none 4 1 509.0 S G 16896( 3) - 21-Jun-2022 14:12:49 - [ 9] Summary Form for Proposal 16896 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=509, FP-POS=ALL ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 3 D TO 4 D, AFTER 02 BY 3 D TO 4 D, AFTER 03 BY 3 D TO 4 D, AFTER 04 BY 3 D TO 4 D, BETWEEN 02-NOV-2022:00:00:00 AND 20-NOV-2022:00:00:00, BETWEEN 22-DEC-2022:00:00:00 AND 10-JAN-2023:00:00:00 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140L, MIRRORB ------------------------------------------------------------------------------------------------------------------------------------ Target Names LEDA-2816068 ------------------------------------------------------------------------------------------------------------------------------------