NICER observation list: Target ID 360701

Abstract

GRS 1915+105 is a black hole binary known for its unique variability, strong winds, jets, and BH spin. After 23 years of monitoring, NICER has detected a huge change in this iconic source: the X-ray flux has dropped by 100x! Is this the approach to quiescence? Spectra suggest a large obscuring shroud, but what is this obscuring gas? The 'obscured' state is highly variable, with flares that reveal strong winds and highly-ionized absorption. We propose to study its long-term evolution with 35 weekly exposures of 2.7 ks in Cycle 2. NICER is the only mission capable of frequently monitoring this important new state. We request 3x25 ks NuSTAR to constrain scattering and wind photoionziation. These observations will also continue to grow our NICER legacy archive of variability in GRS 1915+105.
Obsid RA DEC l b Start End Exposure Number of modules Status of Processing Date of Processing Public date
3607010101 288.799 10.947 45.36675 -0.21908 58908.0190 58908.2331 0.00000 50 VALIDATED 58912.6 58922
3607010102 288.799 10.946 45.36683 -0.21993 58912.7218 58912.9940 1716.00000 50 VALIDATED 58917.8 58926
3607010103 288.799 10.946 45.36611 -0.21987 58913.3009 58913.5745 1059.00000 50 VALIDATED 58917.8 58927
3607010104 288.798 10.946 45.36576 -0.21905 58918.4652 58918.7380 1134.00000 52 VALIDATED 58981.9 58932
3607010201 288.798 10.946 45.36570 -0.21908 58920.2078 58920.3491 1284.00000 52 VALIDATED 58924.8 58934
3607010301 288.798 10.945 45.36522 -0.21889 58924.1446 58924.2958 5123.00000 52 VALIDATED 58928.7 58938
3607010302 288.798 10.945 45.36499 -0.21879 58927.2578 58927.3920 386.00000 52 VALIDATED 58931.6 58941
3607010401 288.798 10.945 45.36539 -0.21902 58931.5044 58931.6498 3817.00000 52 VALIDATED 58992.5 58945
3607010501 288.799 10.944 45.36479 -0.22011 58942.7663 58942.9715 0.00000 52 VALIDATED 58947.9 58956
3607010502 288.798 10.945 45.36562 -0.21946 58944.8278 58944.9703 3334.00000 52 VALIDATED 58949.9 58958
3607010601 288.799 10.946 45.36590 -0.21953 58949.0784 58949.1590 2966.00000 52 VALIDATED 58953.6 58963
3607010602 288.799 10.945 45.36584 -0.22034 58953.9859 58953.9982 646.00000 52 VALIDATED 58960.9 58967
3607010701 288.799 10.944 45.36473 -0.22048 58954.0505 58954.6625 14178.00000 52 VALIDATED 58961.0 58968
3607010702 288.799 10.945 45.36510 -0.22006 58955.0303 58955.2244 3362.00000 52 VALIDATED 58961.0 58969
3607010703 288.798 10.946 45.36575 -0.21906 58958.3308 58958.3426 947.00000 52 VALIDATED 58962.8 58972
3607010704 288.798 10.946 45.36589 -0.21898 58959.1521 58959.2933 495.00000 52 VALIDATED 58963.8 58973
3607010801 288.798 10.946 45.36623 -0.21903 58962.3768 58962.5787 3681.00000 52 VALIDATED 58966.7 58976
3607010901 288.799 10.949 45.36856 -0.21824 58969.6067 58969.9431 2271.00000 52 VALIDATED 58973.8 58983
3607010902 288.798 10.950 45.36975 -0.21695 58969.9939 58970.0074 970.00000 52 VALIDATED 58974.6 58984
3607011001 288.799 10.946 45.36633 -0.21931 58980.6480 58980.6602 720.00000 52 VALIDATED 59010.0 58994
3607011101 288.798 10.946 45.36622 -0.21892 58986.4104 58986.6016 2174.00000 52 VALIDATED 58993.8 59000
3607011201 288.798 10.946 45.36570 -0.21908 58990.2843 58990.4905 2988.00000 52 VALIDATED 59011.8 59004
3607011202 288.798 10.946 45.36556 -0.21904 58993.0424 58993.4374 3492.00000 52 VALIDATED 58997.8 59007
3607011301 288.798 10.946 45.36541 -0.21901 58996.9799 58997.0662 3629.00000 52 VALIDATED 59001.7 59011
3607011302 288.798 10.945 45.36536 -0.21904 59000.7876 59000.9896 2510.00000 52 VALIDATED 59008.9 59014
3607011303 288.798 10.945 45.36534 -0.21905 59001.0457 59001.0542 631.00000 52 VALIDATED 59008.9 59015
3607011401 288.798 10.945 45.36531 -0.21906 59004.2093 59004.3002 2902.00000 52 VALIDATED 59012.0 59018
3607011402 288.796 10.942 45.36153 -0.21927 59007.4371 59007.5782 2998.00000 52 VALIDATED 59026.8 59021
3607011501 288.800 10.944 45.36454 -0.22125 59010.9958 59011.1937 2394.00000 52 VALIDATED 59021.6 59025
3607011502 288.800 10.944 45.36553 -0.22150 59014.6072 59014.6951 2404.00000 52 VALIDATED 59018.8 59028
3607011601 288.798 10.946 45.36574 -0.21950 59018.2210 59018.3088 1783.00000 52 VALIDATED 59022.7 59032
3607011602 288.799 10.944 45.36473 -0.22026 59022.2992 59022.3840 3174.00000 52 VALIDATED 59026.9 59036
3607011701 288.798 10.944 45.36462 -0.21998 59025.1384 59025.2248 2468.00000 52 VALIDATED 59029.6 59039
3607011801 288.798 10.946 45.36562 -0.21923 59029.5159 59029.5481 2237.00000 52 VALIDATED 59034.7 59043
3607011802 288.798 10.946 45.36587 -0.21944 59031.7799 59031.9838 2385.00000 52 VALIDATED 59036.6 59045
3607011901 288.797 10.948 45.36745 -0.21672 59039.0176 59039.1002 3018.00000 52 VALIDATED 59043.7 59053
3607011902 288.798 10.946 45.36567 -0.21887 59042.6449 59042.7806 1488.00000 52 VALIDATED 59046.7 59056
3607012001 288.799 10.947 45.36703 -0.21971 59046.5613 59046.8356 871.00000 52 VALIDATED 59051.7 59060
3607012002 288.802 10.946 45.36774 -0.22278 59050.0530 59050.1937 1743.00000 52 VALIDATED 59054.7 59064
3607012101 288.798 10.947 45.36670 -0.21866 59053.0299 59053.1687 2111.00000 52 VALIDATED 59057.8 59067
3607012102 288.799 10.947 45.36664 -0.21914 59055.0220 59055.1697 3607.00000 52 VALIDATED 59059.6 59069
3607012201 288.801 10.947 45.36827 -0.22072 59059.7317 59059.9361 2701.00000 52 VALIDATED 59063.7 59073
3607012202 288.798 10.945 45.36542 -0.21934 59063.7956 59063.9380 2912.00000 52 VALIDATED 59068.8 59077
3607012301 288.798 10.946 45.36554 -0.21894 59066.8294 59066.9137 3320.00000 52 VALIDATED 59081.7 59080
3607012401 288.798 10.945 45.36534 -0.21894 59074.1361 59074.2810 3233.00000 51 VALIDATED 59078.8 59088
3607012501 288.798 10.946 45.36543 -0.21900 59077.8717 59077.9613 1165.00000 51 VALIDATED 59083.7 59091
3607012502 288.798 10.946 45.36540 -0.21902 59078.0104 59078.0259 387.00000 51 VALIDATED 59083.7 59092
3607012503 288.798 10.945 45.36493 -0.21882 59080.4646 59080.6745 3226.00000 51 VALIDATED 59084.6 59094
3607012601 288.801 10.944 45.36521 -0.22222 59085.8852 59085.9694 1890.00000 51 VALIDATED 59090.6 59099
3607012602 288.799 10.945 45.36529 -0.22030 59088.0788 59088.3514 2819.00000 51 VALIDATED 59092.6 59102
3607012603 288.799 10.946 45.36587 -0.21988 59091.0489 59091.4549 3119.00000 51 VALIDATED 59095.7 59105
3607012701 288.800 10.945 45.36538 -0.22113 59095.1769 59095.2725 3230.00000 52 VALIDATED 59099.6 59109
3607012702 288.800 10.945 45.36594 -0.22106 59098.0199 59098.1620 2846.00000 51 VALIDATED 59102.6 59112
3607012801 288.798 10.946 45.36559 -0.21925 59102.0366 59102.1637 3388.00000 51 VALIDATED 59106.7 59116
3607012802 288.797 10.946 45.36566 -0.21810 59105.5071 59105.7127 2123.00000 51 VALIDATED 59109.7 59119
3607012901 288.798 10.946 45.36559 -0.21925 59109.2038 59109.3479 2763.00000 51 VALIDATED 59113.7 59123
3607013101 288.798 10.946 45.36620 -0.21893 59123.1505 59123.2949 3521.00000 51 VALIDATED 59127.7 59137
3607013102 288.801 10.947 45.36844 -0.22097 59127.3984 59127.7493 4397.00000 51 VALIDATED 59131.7 59141
3607013201 288.798 10.945 45.36504 -0.21876 59130.0571 59130.2060 2466.00000 51 VALIDATED 59134.7 59144
3607013301 288.798 10.946 45.36550 -0.21919 59138.5658 59138.7900 8684.00000 51 VALIDATED 59142.6 59152
3607013401 288.798 10.946 45.36543 -0.21889 59143.6646 59143.7574 3571.00000 51 VALIDATED 59147.7 59157
3607013402 288.798 10.945 45.36528 -0.21897 59147.6021 59147.6884 2456.00000 51 VALIDATED 59151.7 59161
3607013501 288.798 10.946 45.36542 -0.21901 59151.5391 59151.8257 1963.00000 51 VALIDATED 59156.1 59165
3607013502 288.798 10.945 45.36446 -0.21929 59154.3198 59154.4648 2826.00000 51 VALIDATED 59159.7 59168
3607013701 288.800 10.947 45.36787 -0.21972 59163.4303 59163.5713 0.00000 51 VALIDATED 59167.7 59177
3607013702 288.801 10.945 45.36663 -0.22225 59165.0416 59165.1326 1728.00000 51 VALIDATED 59169.7 59179
3607013703 288.800 10.946 45.36662 -0.22070 59168.8489 59168.9336 86.00000 48 VALIDATED 59172.7 59182
3607013704 288.800 10.946 45.36669 -0.22078 59168.9776 59169.0014 357.00000 48 VALIDATED 59174.6 59183
3607013801 288.798 10.946 45.36575 -0.21950 59172.1493 59172.2363 1407.00000 48 VALIDATED 59178.0 59186
3607013802 288.798 10.946 45.36557 -0.21915 59174.0231 59174.6245 2950.00000 48 VALIDATED 59179.7 59188
3607013803 288.799 10.946 45.36606 -0.21967 59175.3685 59175.5106 0.00000 48 VALIDATED 59179.8 59189
3607013804 288.798 10.946 45.36618 -0.21861 59179.9511 59179.9641 0.00000 49 VALIDATED 59184.7 59193
3607013805 288.798 10.946 45.36627 -0.21867 59180.0157 59180.0933 0.00000 49 VALIDATED 59184.7 59194
3607013806 288.798 10.946 45.36605 -0.21823 59182.8565 59182.9375 0.00000 49 VALIDATED 59186.7 59196
3607013807 288.798 10.946 45.36605 -0.21867 59182.9856 59183.0032 0.00000 49 VALIDATED 59187.7 59197
3607013808 288.798 10.946 45.36606 -0.21878 59186.0848 59186.2278 0.00000 47 VALIDATED 59190.7 59200