Observing schedules

Short Range Observatory Schedule    

This is the confirmed schedule of NuSTAR observations. This sequence of observations has been uploaded to the spacecraft and will execute autonomously unless interrupted by a new schedule, Target of Opportunity, or instrument and spacecraft anomalies. This schedule will cover various time ranges depending on the exposure time goal of the observations, but will usually be for a period of at least one week.

The times reported here are the start and end of the on-target period (day of year UTC). The estimated exposure time takes into account Earth occultation and the SAA passage time where detector background is increased. The end time of the observation is the start of the slew to the next target. Please examine the NuSTAR As-Flown Timeline (AFT) for the log of past observations.

The NuSTAR schedule (including past observations and those in the short-range schedule) is also available via a Google Calendar that is automatically updated when the schedule changes. While we make a best-effort attempt to keep the calendar updated, the schedule found on this page will always contains the most accurate version of the NuSTAR schedule.

This schedule is also available above as a csv file in the IVOA Observation Locator Access Protocol (ObsLoc) format currently under development. See WD-ObsLocTAP and WD-ObjVisSAP documents submitted to IVOA at www.ivoa.net/documents/index.html for more information. The first three rows in the csv file list the Column Name, Unit, and Type. Note that columns are delimited by a '|' symbol and that many of the fields have NULL values or values specific to the NuSTAR observatory and instruments. This is a prelimary format and is very likely to be updated once these protocols are adopted by the IVOA. If you have any questions please contact nustar-help at srl.caltech.edu

Table Header Explanations obs_start - Observation start time (UTC)
obs_end - Observation end (UTC)
sequenceID - Observation ID
Name - Target name
J2000 RA - J2000 epoch Right Ascension (degrees)
J2000 Dec - J2000 epoch Declination (degrees)
Exp - Approximate exposure time (ks)
Notes - Observation notes

obs_start obs_end sequenceID Name J2000 RA J2000 Dec Exp Notes
2026:201:19:50:102026:204:08:00:0061201028002MRK_59033.63983-0.76672109.8Coordinated with XMM and XRISM
2026:204:09:00:122026:205:09:25:0041201005002PSR_J1400m6325210.19038-63.4285860.3
2026:205:09:50:072026:205:20:55:00312020280021A0538m6683.92083-66.8648624.2(1/10)
2026:205:21:30:002026:206:09:20:00601615630022MASXJ13532820m1123055208.36750000-11.3850000023.8BAT AGN
2026:206:09:50:082026:206:20:45:0031261012002GS_0834m430128.98108-43.1856121.9
2026:206:20:55:232026:208:19:45:0041201002002PUPPIS_A125.81687-42.7600695.9
2026:208:20:20:052026:209:08:25:0060061043002MCGp00_11_00760.7013021.965422.7BAT AGN
2026:209:08:55:222026:212:05:10:0031201013002PSR_J0248p602142.0776760.35964150.4


Long Range Observatory Schedule    

This is the latest NuSTAR long-term schedule. Observations have been sorted into one-week intervals, taking into account Sun, Moon, required exposure time, and other constraints. So the date is the Monday of the week in which the observation is scheduled to begin.

E.g. An observation with a date 2020-07-01 in this table is scheduled to have the observation starting sometime
between 2020-06-29 0000Z (DOY 2020:181) and 2020-07-06 0000Z.

The NuSTAR observing schedule is driven by the large number of observations coordinated with other observatories and the need to complete the NuSTAR Guest Observer programs. The exposure goal for targets allotted within one week may appear to fill more then the available NuSTAR exposure time in that week (average is 330 ks of exposure time per week) but many observations start in one week and complete in the following week.

Please note that only observations with specific time constraints are listed here, other GO targets will be scheduled at the first opportunity in each observing cycle. Targets of opportunity, and instrument or spacecraft anomalies, may also cause the observing times of targets to shift. This long-term schedule is our present estimate of the future order of observations. Please be aware of the uncertainties.

Notes: Information in the notes column indicates which program the observation is assigned to. Joint program observations with XMM-Newton (e.g. X19) usually involve coordinated NuSTAR and XMM-Newton observations, similarly with Chandra, INTEGRAL, Swift, and NICER. Additional coordinations are shown in parenthesis. E.g. N06 (XMM) indicates a coordinated observation in NuSTAR GO cycle-6 with XMM-Newton, S16 (MAGIC) indicates a joint NuSTAR / Swift cycle-16 observation coordinated with MAGIC, etc.

ToO = Target of Opportunity    DDT = Directors Discretionary Time    EGS = Extragalactic legacy surveys    CAL = Calibration   
N11 = NuSTAR GO cycle-11    X24 = XMM-Newton GO cycle-24    C26 = Chandra GO cycle-26   
S16 = Swift GO cycle-16    R07 = NICER GO cycle-7    P02 = IXPE GO cycle-2

Last updated: 2026-07-01

Table Header Explanations DOY week - Day of Year of the Monday of the week the observation is scheduled to start
week_date - Date of the Monday of the week the observation is scheduled to start
obsID - Observation ID number
name - Target name
J2000_RA - J2000 epoch Right Ascension (degrees)
J2000_Dec - J2000 epoch Declination (degrees)
Exp - Approximate exposure time (ks)
Notes - Observation notes

DOY week week of observation obsID name J2000 RA J2000 Dec Exp Notes
2026:2012026-07-2061201028MRK_59033.63983-0.76672100XMM XRISM
31202003Cen_X3170.31271-60.6238920(2/2) IXPE
2026:2082026-07-27612600012MASX_J15024505m2819225.68833-28.3278935XMM
31201019AXJ1700d2m4220255.08042-42.3387260
2026:2152026-08-0331202024NGC5907_ULX1228.9941756.30278100(1/2) XMM
312020261E_1547d0m5408237.7255-54.3066925(1/2) IXPE Swift
61262001J025055d34m361635d742.73058-36.2765840XMM
2026:2222026-08-1061262002J025655d94m152105d844.23308-15.3516480XMM
61102001NGC_135853.415333-5.0895082x25(1/3) Chandra
31202024NGC5907_ULX1228.9941756.30278100(2/2) XMM
2026:2292026-08-1711202302Crab83.63303022.01447010
61102001NGC_135853.415333-5.08950825(2/3) Chandra
71201005MACS_J1752d0p4440268.0087544.67731200
2026:2362026-08-2441110001V4641_SGR_POS1274.725000-25.4352778100
41102016V4641_SGR_BACKGROUND274.1905073-25.2346630
2026:2432026-08-3111202302Crab83.63303022.01447010XMM
811023411E_1841m045280.33059-4.9364350
41110003V4641_SGR_POS3274.875000-25.6144444200
41102016V4641_SGR_BACKGROUND274.1905073-25.2346630
2026:2502026-09-0761202019MRK_501253.4675839.7601720(4/4) IXPE MAGIC
2026:2572026-09-1461102001NGC_135853.415333-5.08950825(3/3) Chandra
2026:2642026-09-2161101020PDS_456262.08246-14.26553150XMM XRISM
2026:2712026-09-2831201034A0620m0095.68558-0.34564200XMM
31201017IGR_J16320m4751248.00733-47.8747270c
31202033XTE_J1855m026283.876691-2.60464940(1/2) XMM
71201004TRIANGULUM_AUSTRALIS249.6650-64.360125
2026:2852026-10-1231202033XTE_J1855m026283.876691-2.60464940(2/2) XMM
61202011NGC6921307.1202525.7233630(1/3) XMM
2026:2922026-10-1961201026RXJ2216d8m4451334.22175-44.86583120XMM
11202302Crab83.63303022.01447010
2026:2992026-10-2661262004J093625d44p394933d7144.10639.82603210XMM
31201006MAXI_J0709m159107.404083-16.09633340XMM
81202348RU_PEG333.5106312.7031440
31202029NGC_7793_P13359.46292-32.6240650
2026:3062026-11-03712010063C_438328.99397837.984525300
31202040SS_433287.95654.982722x20(1-2/2) XRISM IXPE
11201613PKS2155m304329.716938-30.22558840XMM
2026:3132026-11-1031201037PSR_J1101m610165.450068-61.005044500
2026:3342026-11-3061202011NGC6921307.1202525.7233630(2/3) XMM
2026:3412026-12-0761262003J110817d16m051603d3167.0715-5.26758170XMM
2026:3482026-12-1461201013NSA_52675185.9284258.24622150XMM
61201025RXJ0148d3m275827.09304-27.97378120XMM
2026:3622026-12-2861201004RX_J2314p2243348.73208322.72361150XMM
61260005ESO_315mG020145.59162-41.8149735XMM
61263003WISSH_63216.7341360.43081200XMM
2027:0112027-01-11112026013C273187.2779202.0525030IACHEC campaign
61260002NGC_124147.81087-8.9225835XMM
61201015ESO511mG030214.84333-26.64475100XMM
2027:0182027-01-18312020054U_1254m69194.404917-69.2886112x25(1-2/2) XMM XRISM
31261009XTE_J1543m568236.008-56.71220
312020261E_1547d0m5408237.7255-54.3066925(2/2) IXPE Swift
2027:0252027-01-25312020043FGL_J0212d1p532033.04366753.36077240(1/2) XMM
61260004ESO_325mIG_022207.06333-42.1722230XMM
2027:0322027-02-0161201024J052915m43515282.3158-43.8645200XMM
312020043FGL_J0212d1p532033.04366753.36077240(2/2) XMM
11302302Crab83.63303022.01447010
2027:0392027-02-0861263002WISSH_78245.32042-0.71417180XMM
2027:0532027-02-1541201004G292d0p1d8171.244-59.31950
11302302Crab83.63303022.01447010XMM
2027:0812027-03-2211302302Crab83.63303022.01447010
2027:1022027-03-1211302302Crab83.63303022.01447010
2027:1092027-03-1961263001WISSH_14136.0970813.15578200XMM
61263004WISSH_27156.8115835.7215200XMM
2027:1232027-05-0361260003MCGm02m26m007149.36517-13.8580635XMM
2027:1372027-05-1761202011NGC6921307.1202525.7233630(3/3) XMM
2027:2282027-08-1611302302Crab83.63303022.01447010
2027:2492027-09-0611302302Crab83.63303022.01447010
2027:2702027-09-2711302302Crab83.63303022.01447010
2027:2982027-10-2511302302Crab83.63303022.01447010