NICER observation list: Target ID 360701
- Proposal Number = 3607
- Target ID = 360701
- Target Name = GRS_1915+105
- Proposal Title = THE 'OBSCURED' STATE: WINDS AND THE END OF GRS 1915+105?
- PI = JOSEPH NEILSEN
- Proposal Category = BLACK HOLES
- Cycle number = 3
- Observation Type = NOR
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 |