NICER observation list: Target ID 557801

Abstract

We ask to monitor the next two luminous classical or recurrent novae in outburst. The eruptions occur on shell burning white dwarfs undergoing a thermonuclear runaway; after the initial flash and a following radiation pressure driven wind, the white dwarf's atmosphere shrinks to almost pre-eruption radius with a very thin layer above the burning shell, reaching extremely high effective temperature - up to a million K. The white dwarf is observed directly as a luminous supersoft X-ray source (SSS). NICER is ideal to study the SSS, because of its response in the soft range and timing capabilities. Several novae in the SSS phase, as well as permanently burning SSS, also show puzzling modulations with periods around a minute, and NICER is extremely useful in their investigation.
Obsid RA DEC l b Start End Exposure Number of
Modules		 Number of
Processing		 Status of
Processing		 Date of
Processing		 Public
date
5578010101 245.629 -17.879 357.669 21.869 59754.6487 59754.8616 4172.0 52 5 VALIDATED 59768.0 59768
5578010201 245.629 -17.879 357.668 21.868 59755.4748 59755.5637 2554.0 52 5 VALIDATED 59768.1 59769
5578010301 0.000 -90.000 302.932 -27.128 59756.3163 59756.3414 0.0 52 4 VALIDATED 59768.2 59770
5578010401 245.628 -17.879 357.668 21.869 59757.1667 59757.8944 4978.0 52 4 VALIDATED 59782.8 59771
5578010501 245.628 -17.879 357.668 21.869 59758.2035 59758.9914 7512.0 52 6 VALIDATED 59782.9 59772
5578010502 245.628 -17.879 357.668 21.869 59759.1072 59759.4429 2822.0 52 3 VALIDATED 59769.9 59773
5578010601 245.628 -17.879 357.669 21.869 59759.6234 59759.8698 1448.0 52 3 VALIDATED 59769.9 59773
5578010602 245.628 -17.879 357.669 21.869 59760.0069 59760.0238 1067.0 52 3 VALIDATED 59769.9 59774
5578010701 245.628 -17.879 357.669 21.869 59760.5873 59760.9255 3484.0 52 9 VALIDATED 59779.0 59774
5578010801 245.628 -17.879 357.668 21.869 59761.4266 59761.7481 1597.0 52 4 VALIDATED 59771.2 59775
5578010901 245.628 -17.879 357.669 21.869 59762.7046 59762.8445 785.0 52 4 VALIDATED 59772.8 59776
5578011001 245.628 -17.878 357.669 21.869 59763.4787 59763.6185 1410.0 52 4 VALIDATED 59772.8 59777
5578011101 245.628 -17.878 357.669 21.869 59764.5755 59764.9734 1366.0 52 5 VALIDATED 59774.8 59778
5578011201 245.628 -17.878 357.669 21.869 59765.6713 59765.8053 631.0 52 5 VALIDATED 59775.9 59779
5578011301 245.627 -17.878 357.669 21.870 59766.5745 59766.7157 786.0 52 6 VALIDATED 59779.1 59780
5578011401 245.627 -17.878 357.669 21.870 59767.0261 59767.9420 2803.0 52 5 VALIDATED 59779.1 59781
5578011501 245.628 -17.878 357.669 21.870 59768.1232 59768.6514 2124.0 52 4 VALIDATED 59779.2 59782
5578011601 245.627 -17.877 357.669 21.870 59769.2384 59769.6833 1698.0 52 5 VALIDATED 59782.9 59783
5578011901 245.628 -17.876 357.671 21.871 59772.0649 59772.3340 2296.0 52 5 VALIDATED 59784.8 59786
5578012001 245.627 -17.878 357.668 21.870 59773.1654 59773.3053 2083.0 52 4 VALIDATED 59784.9 59787
5578012101 245.627 -17.878 357.668 21.870 59774.0721 59774.2061 1422.0 52 3 VALIDATED 59785.0 59788
5578012201 245.628 -17.878 357.669 21.869 59775.5438 59775.6822 1327.0 52 5 VALIDATED 59796.9 59789
5578012301 245.628 -17.878 357.668 21.869 59776.3187 59776.4576 2253.0 52 4 VALIDATED 59786.8 59790
5578012302 245.628 -17.878 357.668 21.869 59777.0292 59777.0414 996.0 52 3 VALIDATED 59786.8 59791
5578012401 245.628 -17.879 357.668 21.869 59777.3517 59777.8794 1447.0 52 6 VALIDATED 59793.9 59791
5578012501 245.627 -17.876 357.670 21.871 59778.6428 59778.9090 1113.0 52 4 VALIDATED 59788.8 59792
5578012601 245.629 -17.876 357.671 21.870 59779.5473 59779.8127 1929.5 52 8 VALIDATED 59794.0 59793
5578012701 245.628 -17.878 357.669 21.869 59780.1271 59780.2623 1247.5 52 5 VALIDATED 59792.1 59794
5578013101 245.628 -17.878 357.669 21.869 59784.3456 59784.9329 2311.0 52 6 VALIDATED 59800.0 59798
5578013102 245.632 -17.879 357.671 21.866 59785.1819 59785.1905 693.0 52 5 VALIDATED 59800.1 59799
5578013201 245.628 -17.878 357.669 21.869 59785.3108 59785.3199 737.0 52 5 VALIDATED 59800.1 59799
5578013301 245.628 -17.878 357.669 21.869 59786.7947 59786.8037 711.0 52 6 VALIDATED 59800.2 59800
5578013401 245.631 -17.882 357.667 21.864 59787.6943 59787.7069 816.0 52 5 VALIDATED 59800.3 59801