NICER observation list: Target ID 261202

Abstract

During Cycle 1, the two stars in Eta Car, the superluminous, long-period, highly eccentric colliding-wind binary system will go through periastron passage. The X-ray emission will increase by about a factor of four then plunge to a minimum near inferior conjunction of the primary star. \nicer\ monitoring spectrometry (80 ksec total) is critical to measure variations in X-ray emission measure and column densities to measure changes in the shocked and un-shocked stellar winds as a function of orbital phase and time, and to help constrain the mechanism which causes X-ray flaring seen in previous cycles. These monitoring observations will also provide context our four high-resolution Chandra grating observations which will occur during the Cycle 1 interval.
Obsid RA DEC l b Start End Exposure Number of
Modules
Number of
Processing
Status of
Processing
Date of
Processing
Public
date
2612020101 161.264 -59.689 287.598 -0.634 58786.7983 58786.8731 0.0 52 2 VALIDATED 58790.9 58800
2612020201 161.267 -59.688 287.600 -0.633 58788.7949 58788.8102 0.0 51 3 VALIDATED 58793.7 58802
2612020301 161.268 -59.688 287.600 -0.632 58790.5337 58790.5581 0.0 52 2 VALIDATED 58795.3 58804
2612020401 161.270 -59.689 287.601 -0.632 58793.6933 58793.7199 0.0 52 4 VALIDATED 58800.0 58807
2612020501 161.271 -59.687 287.601 -0.630 58795.0450 58795.0728 0.0 52 3 VALIDATED 58801.1 58809
2612020601 161.271 -59.686 287.600 -0.630 58797.3659 58797.3956 205.0 52 3 VALIDATED 58802.8 58811
2612020701 161.271 -59.685 287.600 -0.629 58800.0102 58800.0294 0.0 52 2 VALIDATED 58805.7 58814
2612020801 161.266 -59.684 287.597 -0.629 58802.0076 58802.0271 0.0 52 1 VALIDATED 58805.9 58816
2612020901 161.269 -59.685 287.599 -0.629 58804.0078 58804.0278 30.0 52 2 VALIDATED 58810.8 58818