NICER observation list: Target ID 365702
- Proposal Number = 3657
- Target ID = 365702
- Target Name = 4U_1608-522
- Proposal Title = SOFT X-RAY OBSERVATIONS OF X-RAY BURSTS FROM SELECTED LOW MASS X-RAY BINARIES WITH NICER
- PI = TOLGA GUVER
- Proposal Category = X-RAY BINARIES
- Cycle number = 3
- Observation Type = NOR
Abstract
We propose NICER observations of low mass X-ray binaries, 4U 1608-52, Aql X-1, and 4U 1735-44 that show thermonuclear X-ray bursts, for 80~ks each. NICER provides the largest effective area in the soft X-rays, which allow for time resolved spectral and temporal analysis of the evolution of bursts. Initial observations of these events in the soft X-rays, showed that unlike the previous assumption time resolved X-ray spectra of X-ray bursts often can not be fit with simple Planckian functions and often require a second component whose nature is not really understood well yet, although assumed to be due to reflection off the accretion disk. We plan to observe sources with relatively low hydrogen column density to fully investigate their soft components.
| Obsid |
RA |
DEC |
l |
b |
Start |
End |
Exposure |
Number of modules |
Status of Processing |
Date of Processing |
Public date |
| 3657020101 |
243.180 |
-52.423 |
330.92687 |
-0.85048 |
59005.6467 |
59005.9826 |
4201.00000 |
52 |
VALIDATED |
59012.8 |
59019 |
| 3657020102 |
243.178 |
-52.423 |
330.92569 |
-0.85039 |
59006.0412 |
59006.1118 |
1366.00000 |
52 |
VALIDATED |
59012.8 |
59020 |
| 3657020201 |
243.178 |
-52.423 |
330.92569 |
-0.85039 |
59006.4208 |
59006.8215 |
1903.00000 |
52 |
VALIDATED |
59012.8 |
59020 |
| 3657020301 |
243.180 |
-52.423 |
330.92680 |
-0.85046 |
59007.0032 |
59007.8472 |
3108.00000 |
52 |
VALIDATED |
59026.7 |
59021 |
| 3657020401 |
243.179 |
-52.423 |
330.92655 |
-0.85054 |
59008.0327 |
59008.9940 |
3303.00000 |
52 |
VALIDATED |
59026.8 |
59022 |
| 3657020501 |
243.180 |
-52.423 |
330.92683 |
-0.85096 |
59009.0508 |
59009.7692 |
3895.00000 |
52 |
VALIDATED |
59026.8 |
59023 |
| 3657020601 |
243.179 |
-52.423 |
330.92655 |
-0.85055 |
59010.5334 |
59010.9958 |
890.00000 |
52 |
VALIDATED |
59025.8 |
59024 |
| 3657020701 |
243.179 |
-52.423 |
330.92628 |
-0.85057 |
59011.4378 |
59011.8361 |
3156.00000 |
52 |
VALIDATED |
59018.7 |
59025 |
| 3657020801 |
243.179 |
-52.423 |
330.92623 |
-0.85053 |
59012.2767 |
59012.8053 |
3926.00000 |
52 |
VALIDATED |
59016.7 |
59026 |
| 3657020901 |
243.179 |
-52.423 |
330.92630 |
-0.85054 |
59013.1804 |
59013.2569 |
1955.00000 |
52 |
VALIDATED |
59017.8 |
59027 |
| 3657021001 |
243.180 |
-52.423 |
330.92638 |
-0.85082 |
59014.4061 |
59014.8704 |
2372.00000 |
52 |
VALIDATED |
59018.8 |
59028 |
| 3657021101 |
243.179 |
-52.423 |
330.92625 |
-0.85033 |
59015.6322 |
59015.7738 |
2660.00000 |
52 |
VALIDATED |
59019.8 |
59029 |
| 3657021102 |
243.179 |
-52.423 |
330.92641 |
-0.85052 |
59016.0839 |
59016.0965 |
734.00000 |
52 |
VALIDATED |
59020.7 |
59030 |
| 3657021201 |
243.179 |
-52.423 |
330.92636 |
-0.85030 |
59016.5373 |
59016.8708 |
2289.00000 |
52 |
VALIDATED |
59020.8 |
59030 |
| 3657021301 |
243.179 |
-52.423 |
330.92635 |
-0.85067 |
59017.3100 |
59017.9678 |
2662.00000 |
52 |
VALIDATED |
59022.7 |
59031 |
| 3657021401 |
243.179 |
-52.423 |
330.92618 |
-0.85023 |
59018.6652 |
59018.7424 |
1663.00000 |
52 |
VALIDATED |
59022.7 |
59032 |
| 3657021501 |
243.180 |
-52.423 |
330.92661 |
-0.85057 |
59019.5686 |
59019.7102 |
2648.00000 |
52 |
VALIDATED |
59023.7 |
59033 |
| 3657021601 |
243.179 |
-52.423 |
330.92647 |
-0.85037 |
59020.1494 |
59020.7988 |
3851.00000 |
52 |
VALIDATED |
59024.9 |
59034 |
| 3657021701 |
243.179 |
-52.423 |
330.92639 |
-0.85054 |
59020.9884 |
59021.9633 |
2213.00000 |
52 |
VALIDATED |
59026.9 |
59035 |
| 3657021801 |
243.179 |
-52.423 |
330.92644 |
-0.85048 |
59022.0207 |
59022.7351 |
5310.00000 |
52 |
VALIDATED |
59026.9 |
59036 |
| 3657021802 |
243.179 |
-52.423 |
330.92629 |
-0.85073 |
59022.9888 |
59023.0014 |
513.00000 |
52 |
VALIDATED |
59027.6 |
59037 |
| 3657021901 |
243.179 |
-52.423 |
330.92639 |
-0.85063 |
59023.1179 |
59023.9678 |
5173.00000 |
52 |
VALIDATED |
59028.6 |
59037 |
| 3657022001 |
243.180 |
-52.423 |
330.92639 |
-0.85081 |
59024.0853 |
59024.8727 |
6320.00000 |
52 |
VALIDATED |
59032.6 |
59038 |
| 3657022101 |
243.179 |
-52.423 |
330.92634 |
-0.85068 |
59025.1827 |
59025.7759 |
3538.00000 |
52 |
VALIDATED |
59029.6 |
59039 |
| 3657022201 |
243.179 |
-52.423 |
330.92649 |
-0.85043 |
59026.0208 |
59026.7440 |
1767.00000 |
52 |
VALIDATED |
59030.7 |
59040 |
| 3657022301 |
243.179 |
-52.423 |
330.92617 |
-0.85033 |
59027.0519 |
59027.9053 |
1851.00000 |
52 |
VALIDATED |
59032.6 |
59041 |
| 3657022401 |
243.179 |
-52.422 |
330.92672 |
-0.85001 |
59028.2800 |
59028.7442 |
1474.00000 |
52 |
VALIDATED |
59032.7 |
59042 |
| 3657022501 |
243.179 |
-52.422 |
330.92715 |
-0.84955 |
59029.0547 |
59029.8412 |
1937.00000 |
52 |
VALIDATED |
59034.7 |
59043 |
| 3657022601 |
243.178 |
-52.421 |
330.92699 |
-0.84839 |
59030.2815 |
59030.6801 |
987.00000 |
52 |
VALIDATED |
59033.7 |
59044 |
| 3657022701 |
243.180 |
-52.423 |
330.92648 |
-0.85106 |
59031.0571 |
59031.7771 |
2712.00000 |
52 |
VALIDATED |
59035.7 |
59045 |
| 3657022801 |
243.178 |
-52.422 |
330.92636 |
-0.84906 |
59032.0254 |
59032.9387 |
2490.00000 |
52 |
VALIDATED |
59036.6 |
59046 |
| 3657022901 |
243.178 |
-52.422 |
330.92668 |
-0.84881 |
59033.0588 |
59033.9715 |
2660.00000 |
52 |
VALIDATED |
59038.6 |
59047 |
| 3657023001 |
243.179 |
-52.423 |
330.92624 |
-0.85007 |
59034.1563 |
59034.8868 |
2504.00000 |
52 |
VALIDATED |
59038.6 |
59048 |
| 3657023101 |
243.178 |
-52.423 |
330.92616 |
-0.84998 |
59035.0699 |
59035.8544 |
4363.00000 |
52 |
VALIDATED |
59039.6 |
59049 |
| 3657023201 |
243.178 |
-52.423 |
330.92608 |
-0.84998 |
59036.0287 |
59036.8220 |
2415.00000 |
52 |
VALIDATED |
59040.6 |
59050 |
| 3657023202 |
243.178 |
-52.423 |
330.92606 |
-0.85000 |
59036.9975 |
59037.0155 |
441.00000 |
52 |
VALIDATED |
59041.6 |
59051 |
| 3657023301 |
243.179 |
-52.423 |
330.92623 |
-0.85000 |
59037.1922 |
59037.9772 |
3628.00000 |
52 |
VALIDATED |
59047.6 |
59051 |
| 3657023401 |
243.178 |
-52.423 |
330.92612 |
-0.85002 |
59038.1602 |
59038.5655 |
1946.00000 |
52 |
VALIDATED |
59043.6 |
59052 |
| 3657023501 |
243.178 |
-52.423 |
330.92622 |
-0.84992 |
59039.0005 |
59039.6564 |
2572.00000 |
52 |
VALIDATED |
59043.7 |
59053 |
| 3657023601 |
243.179 |
-52.423 |
330.92612 |
-0.85012 |
59040.3025 |
59040.4369 |
1044.00000 |
52 |
VALIDATED |
59044.6 |
59054 |
| 3657023701 |
243.178 |
-52.423 |
330.92605 |
-0.84983 |
59041.0031 |
59041.2080 |
882.00000 |
52 |
VALIDATED |
59045.6 |
59055 |
| 3657023801 |
243.178 |
-52.423 |
330.92589 |
-0.85009 |
59042.2958 |
59042.8230 |
2642.00000 |
52 |
VALIDATED |
59047.7 |
59056 |
| 3657023901 |
243.173 |
-52.423 |
330.92401 |
-0.84773 |
59043.1366 |
59043.9039 |
651.00000 |
52 |
VALIDATED |
59047.7 |
59057 |
| 3657024001 |
243.177 |
-52.423 |
330.92564 |
-0.84920 |
59044.3470 |
59044.9412 |
580.00000 |
52 |
VALIDATED |
59050.9 |
59058 |
| 3657024002 |
243.174 |
-52.422 |
330.92427 |
-0.84772 |
59045.3787 |
59045.3928 |
304.00000 |
52 |
VALIDATED |
59050.9 |
59059 |
| 3657024101 |
243.176 |
-52.422 |
330.92530 |
-0.84858 |
59044.9919 |
59045.5225 |
3681.00000 |
52 |
VALIDATED |
59050.9 |
59059 |
| 3657024201 |
243.173 |
-52.422 |
330.92396 |
-0.84742 |
59046.7365 |
59046.9465 |
1283.00000 |
52 |
VALIDATED |
59051.7 |
59060 |
| 3657024202 |
243.172 |
-52.422 |
330.92351 |
-0.84692 |
59046.9912 |
59047.1407 |
3915.00000 |
52 |
VALIDATED |
59051.7 |
59061 |
| 3657024301 |
243.172 |
-52.423 |
330.92350 |
-0.84747 |
59047.4429 |
59047.9813 |
4039.00000 |
52 |
VALIDATED |
59052.6 |
59061 |
| 3657024401 |
243.178 |
-52.423 |
330.92538 |
-0.85001 |
59048.0234 |
59048.6294 |
6134.00000 |
52 |
VALIDATED |
59052.6 |
59062 |
| 3657024501 |
243.179 |
-52.423 |
330.92594 |
-0.85057 |
59049.5155 |
59049.6611 |
2177.00000 |
52 |
VALIDATED |
59053.7 |
59063 |
| 3657024601 |
243.179 |
-52.423 |
330.92602 |
-0.85049 |
59050.5455 |
59050.9488 |
3384.00000 |
52 |
VALIDATED |
59054.7 |
59064 |
| 3657024701 |
243.179 |
-52.423 |
330.92606 |
-0.85045 |
59051.1287 |
59051.9803 |
1911.00000 |
52 |
VALIDATED |
59055.6 |
59065 |
| 3657024801 |
243.179 |
-52.423 |
330.92606 |
-0.85053 |
59052.0296 |
59052.4956 |
5999.80471 |
52 |
VALIDATED |
59055.7 |
59066 |
| 3657025001 |
243.172 |
-52.422 |
330.92389 |
-0.84643 |
59054.2667 |
59054.2769 |
0.00000 |
52 |
VALIDATED |
59058.6 |
59068 |
| 3657025601 |
243.180 |
-52.423 |
330.92638 |
-0.85082 |
59060.3306 |
59060.5986 |
3500.00000 |
52 |
VALIDATED |
59064.7 |
59074 |
| 3657025701 |
243.179 |
-52.423 |
330.92642 |
-0.85068 |
59061.3641 |
59061.8928 |
3723.00000 |
52 |
VALIDATED |
59065.7 |
59075 |
| 3657025801 |
243.179 |
-52.423 |
330.92641 |
-0.85060 |
59062.2670 |
59062.9738 |
1733.00000 |
52 |
VALIDATED |
59068.7 |
59076 |
| 3657025901 |
243.180 |
-52.423 |
330.92648 |
-0.85071 |
59063.1150 |
59063.8977 |
469.00000 |
52 |
VALIDATED |
59068.7 |
59077 |
| 3657026001 |
243.180 |
-52.423 |
330.92660 |
-0.85076 |
59064.0190 |
59064.9294 |
200.00000 |
52 |
VALIDATED |
59068.8 |
59078 |
| 3657026101 |
243.180 |
-52.423 |
330.92668 |
-0.85076 |
59065.0525 |
59065.9627 |
450.00000 |
52 |
VALIDATED |
59081.6 |
59079 |
| 3657026201 |
243.180 |
-52.423 |
330.92663 |
-0.85073 |
59066.2153 |
59066.9775 |
2109.00000 |
52 |
VALIDATED |
59081.7 |
59080 |
| 3657026301 |
243.184 |
-52.426 |
330.92672 |
-0.85446 |
59067.2887 |
59067.9465 |
3857.00000 |
52 |
VALIDATED |
59081.8 |
59081 |
| 3657026401 |
243.183 |
-52.425 |
330.92685 |
-0.85352 |
59068.2578 |
59068.9749 |
3016.00000 |
51 |
VALIDATED |
59076.7 |
59082 |
| 3657026501 |
243.182 |
-52.424 |
330.92680 |
-0.85241 |
59069.6137 |
59069.8847 |
1707.00000 |
51 |
VALIDATED |
59074.7 |
59083 |
| 3657026601 |
243.184 |
-52.426 |
330.92691 |
-0.85453 |
59070.1305 |
59070.9185 |
1369.00000 |
51 |
VALIDATED |
59074.8 |
59084 |
| 3657026801 |
243.184 |
-52.424 |
330.92774 |
-0.85311 |
59072.3208 |
59072.8497 |
1517.00000 |
51 |
VALIDATED |
59076.8 |
59086 |
| 3657026901 |
243.184 |
-52.424 |
330.92769 |
-0.85307 |
59073.6114 |
59073.6324 |
1596.00000 |
51 |
VALIDATED |
59083.6 |
59087 |
| 3657027001 |
243.182 |
-52.423 |
330.92784 |
-0.85176 |
59074.5157 |
59074.7819 |
2756.00000 |
51 |
VALIDATED |
59078.8 |
59088 |
| 3657027101 |
243.184 |
-52.425 |
330.92687 |
-0.85421 |
59068.5803 |
59068.5904 |
787.00000 |
51 |
VALIDATED |
59075.7 |
59082 |
| 3657027102 |
243.183 |
-52.422 |
330.92851 |
-0.85157 |
59075.0308 |
59075.0402 |
561.00000 |
51 |
VALIDATED |
59079.8 |
59089 |
| 3657027301 |
243.182 |
-52.422 |
330.92828 |
-0.85129 |
59077.1630 |
59077.1873 |
1441.00000 |
51 |
VALIDATED |
59081.9 |
59091 |
| 3657027501 |
243.178 |
-52.423 |
330.92553 |
-0.85029 |
59079.8935 |
59079.9021 |
594.00000 |
51 |
VALIDATED |
59083.7 |
59093 |
| 3657027601 |
243.184 |
-52.422 |
330.92906 |
-0.85179 |
59080.0804 |
59080.5935 |
1052.00000 |
51 |
VALIDATED |
59084.6 |
59094 |
| 3657029901 |
243.179 |
-52.424 |
330.92595 |
-0.85092 |
59101.4891 |
59101.6956 |
162.00000 |
51 |
VALIDATED |
59105.7 |
59115 |
| 3657029902 |
243.179 |
-52.423 |
330.92616 |
-0.85025 |
59102.1419 |
59102.4074 |
907.00000 |
51 |
VALIDATED |
59106.7 |
59116 |
| 3657029903 |
243.179 |
-52.423 |
330.92651 |
-0.84988 |
59103.0454 |
59103.2465 |
1632.00000 |
51 |
VALIDATED |
59107.6 |
59117 |
| 3657029904 |
243.179 |
-52.423 |
330.92638 |
-0.85001 |
59104.0780 |
59104.2148 |
479.00000 |
51 |
VALIDATED |
59108.6 |
59118 |
| 3657029905 |
243.178 |
-52.422 |
330.92661 |
-0.84879 |
59105.1106 |
59105.2477 |
231.00000 |
51 |
VALIDATED |
59109.6 |
59119 |
| 3657029906 |
243.174 |
-52.421 |
330.92600 |
-0.84668 |
59106.9940 |
59107.0044 |
562.00000 |
51 |
VALIDATED |
59111.6 |
59121 |