NuSTAR ToO targets approved within the NuSTAR, Chandra, XMM-Newton, Swift, NICER, and INTEGRAL General Observer programs
NuSTAR Target of Opportunity (ToO) observations may be proposed for in the NuSTAR, Chandra, XMM-Newton, Neil Gehrels Swift Observatory, NICER mission, and INTEGRAL General Observer (GO) programs.
Last update: 2021-07-16
Proposal title and abstracts are available here, or click on the Proposal number in the table below. Note that NuSTAR ToO and DDT observations may be requested at any time through the ToO/DDT observation request form which provides a list of currently active unanticipated ToO/DDT targets.
Proposals will be marked with an orange background when they are triggered and a green background when they are completed. Targets that have yet to be identified have blank J2000 coordinates.
| NuSTAR GO ToO programs | |||||||
|---|---|---|---|---|---|---|---|
| Proposal | ObsID | Target Name | Comments | ||||
| 06238 | Vestergaard | 80602604 | Mrk 590 | 33.63992 | -0.76675 | 50+40+30 | Joint with 3x25 ks XMM-Newton and 3x10 ks Swift observations Multi-cycle program |
| 07027 | Krucker | 80710201 to 209 | The Sun | 119.8876 | 20.5287 | 25 | Coordinated with STIX on 2021-07-20 |
| 07027 | Krucker | 80711201 | The Sun | 25 | Coordinated with STIX | ||
| 07037 | Brightman | 80701507 | NGC 4045 ULX | 180.6765 | 1.96903 | 100 | Coordinated with XMM-Newton |
| 07052 | Ballhausen | 80701320 | New CRSF Source | 50 | | ||
| 07055 | Jiang | 80701321 | Black hole transient | 30 | | ||
| 07070 | Doroshenko | 80702322 | IXPE Transient X-Ray pulsar | 10, 20, 30, 40, 50 | Coordinated with IXPE | ||
| 07072 | Doroshenko | 80702323 | GK Persei | 52.8 | 43.90428 | 3 x 30 | |
| 07106 | Margutti | 80702508 | SNINTERACTING | 2 x 50 | Coordinated with XMM-Newton | ||
| 07112 | Yao | 80701509 | TDE 1 | 40 | | ||
| 07112 | Yao | 80701510 | TDE 2 | 40 | | ||
| 07113 | Neilsen | 80702324 | Black hole transient | 5 x 20 | Coordinated with NICER | ||
| 07114 | Li | 80701325 | LAT-undetected Nova | 60 | | ||
| 07119 | Borghese | 80701326 | 1E 161348-5055 | 244.40096 | -51.04017 | 75 | Coordinated with XMM-Newton |
| 07128 | Xu | 80701327 | Black hole Hard State | 60 | | ||
| 07137 | Ballhausen | 80701328 | Cep X4 | 324.87787 | 56.98622 | 100 | Trigger on one of three possible targets |
| 07137 | Ballhausen | 80701329 | MXB 0656-072 | 104.57204 | -7.20978 | | |
| 07137 | Ballhausen | 80701330 | Low luminosity CRSF source | | |||
| 07164 | Krauss | 80701610 | ICECUBE1 | 40 | | ||
| 07164 | Krauss | 80701611 | ICECUBE2 | 40 | | ||
| 07167 | Tsuruta | 80701331 | SAX J1808.4-3658 | 272.11475 | -36.97897 | 50 | |
| 07179 | Krumpe | 80701612 | AGN flux drop1 | 100 | | ||
| 07179 | Krumpe | 80701613 | AGN flux drop2 | 100 | | ||
| 07221 | Somalwar | 80702614 | ZTF TDE AGN | 3 x 20 | Coordinated with Swift | ||
| 07259 | Mehdipour | 80701615 | MRK 509 | 311.04067 | -10.72344 | 50 | Trigger on one of six possible targets Coordinated with XMM-Newton |
| 07259 | Mehdipour | 80701616 | MRK 841 | 226.00487 | 10.43789 | | |
| 07259 | Mehdipour | 80701617 | NGC 3783 | 174.75733 | -37.73867 | | |
| 07259 | Mehdipour | 80701618 | NGC 4593 | 189.91454 | -5.34419 | | |
| 07259 | Mehdipour | 80701619 | NGC 7469 | 345.81529 | 8.87369 | | |
| 07259 | Mehdipour | 80701620 | NGC 985 | 38.65738 | -8.78761 | | |
| 07266 | Coughenour | 80701332 | MAXI J1803-298 | 270.76162 | -29.83046 | 50 | Triggered 2021-05-12 |
| 07277 | Yao | 80702511 | FBOT | 30 + 50 | | ||
| 07286 | Feng | 80701621 | Candidate Neutrino blazar | 40 | | ||
| 07302 | Jaodand | 80702333 | Transitional ms pulsar | 3 x 30 | Coordinated with NICER | ||
| Joint NuSTAR/Chandra GO ToO programs | |||||||
| 21400516 | K Mori | 80602301 | Galactic Center transient | tbd | tbd | 2x20 | |
| 22400400 | K Mori | 80702304 | Galactic Center VFXT | tbd | tbd | 2x20 | |
| 22400529 | M Bachetti | 80701305 | M82 X-2 | 148.962667 | 69.679303 | 80 | |
| 22500172 | P Scholz | 80701506 | FRB 20200120E | 149.4850 | 68.8180 | 27 | Triggered 2020-12-02 Coordinated with Effelsberg 100m |
| 22500192 | D Matthews | 80701407 | AT2020xnd (Fast Blue Optical Transient) | 335.008458 | -2.8403611 | 2x25, 2x40 | Triggered 2020-10-26 |
| Joint NuSTAR/XMM-Newton GO ToO programs | |||||||
| 078214 | Felix Fuerst | 80201011 | BH ToO | 40 | Coordinated with 10 x 2 ks Swift observations. Program extended into cycle-17 | ||
| 078430 | Nanda Rea | 80202013 | XTE J1810-197 | 272.46 | -19.731 | 20+30+40+80 | Observations to be obtained over ~3 months. Triggered 2018-12-20 |
| 082145 | Alessandro Papitto | 80401306 | ms pulsar | 60 | |||
| 082359 | Nanda Rea | 80402308 | Swift J1818.0-1607 | 274.5009167 | -16.1311944 | 20,30,40,80 | Triggered 2020-03-20 |
| 084079 | Fiona Harrison | 80501303 | BH hard state | 40 | |||
| 084080 | Norbert Schartel | 80502606 | NGC 1566 | 65.00167 | -54.9378056 | 50 | Triggered 2019-05-30 |
| 084080 | Norbert Schartel | 80502607 | IRAS 23226-3843 | 351.350833 | -38.446944 | 50 | Triggered 2019-10-16 |
| 084355 | Raffaella Margutti | 80502405 | Fast blue optical transient | 2x25 + 2x40 | |||
| 084377 | Norbert Schartel | 80501606 | AGN minimum | 80 | |||
| 084434 | Jelle Kaastra | 80502609 | NGC 3227 | 155.8775 | 19.8650 | 2x25 | Triggered 2019-11-11 |
| 084469 | Jian Li | 80501608 | muon track neutrino | 40 | |||
| 084526 | Luigi Piro | 80501609 | GW event | 150 | |||
| 084545 | James Court | 80502310 | GRO J1744-28 | 266.137875 | -28.740833 | 80 | |
| 086127 | Allesandro Papitto | 80601304 | transitional ms pulsar | 60 | |||
| 086276 | Hannah Earnshaw | 8061305 | NGC 925 ULX-3 | 36.864583 | 33.570278 | 100 | Triggered 2020-08-11 |
| 086342 | Raffaella Margutti | 80602406 | SN2019yvr | 191.28389 | -0.45909 | 2x50 | Triggered 2020-06-18 |
| 086403 | Jennifer Sokoloski | 80602307 | T CrB | 239.875667 | 25.920167 | 50 | Triggered 2020-08-27 |
| 086460 | Nanda Rea | 80602315 | PSR J1846-0258 | 281.60391667 | -2.97502778 | 23,30,40,80 | Triggered 2020-08-02 |
| 088008 | Norbert Schartel | 80701608 | AGN outburst | 2x50 | Coordinated with SALT or HET | ||
| 088054 | Pierre-Olivier Petrucci | 80702310 | BH LMXB | 10x20 | |||
| 088218 | Nanda Rea | 80702311 | Magnetar outburst | ||||
| 088470 | Alessandro Papitto | 80701312 | accreting ms pulsar | 120 | Coordinated with IXPE | ||
| Joint NuSTAR/INTEGRAL GO ToO programs | |||||||
| 1740029 | Riccardo La Placa | 80601314 | Millisecond X-ray pulsar | 30 | Also coordinated with XMM-Newton | ||
| 1740033 | Julia Alfonso-Garzon | 80501302 | H 1145-619 | 177.000083 | -62.2069167 | 25 | Also coordinated with Swift |
| 1840002 | Thomas Siegert | 80701501 | NS merger | 100 | |||
| 1840005 | Zhaosheng Li | 80701302 | Accreting ms pulsar | 30 | Also coordinated with XMM-Newton, NICER, and HXMT | ||
| 1840021 | Ingo Kreykenbohm | 80701303 | Accreting X-ray pulsar | 40 | |||
| 1940020 | Ingo Kreykenbohm | 80801301 | Transient accreting pulsar | 40 | Cycle-19 begins on 2022-01-01 | ||
| 1940025 | Thomas Siegert | 80801502 | GW Neutron star merger | 100 | Cycle-19 begins on 2022-01-01 | ||
| Joint NuSTAR/Swift GO ToO programs | |||||||
| 1619112 | Luigi Piro | 80601509 | FRB201124 | 77.0125 | 26.0606 | 20 | Fast Radio burst |
| 1619112 | Luigi Piro | 80601510 | Fast Radio burst 2 | tbd | tbd | 20 | |
| 1619139 | Liliana Sandoval | 80602511 | Fast-Evolving Luminous Transient | tbd | tbd | 3x20 | |
| Joint NuSTAR/NICER GO ToO programs | |||||||
| 04060 | Teruaki Enoto | 80702313 | Swift J1555.2-5402 | 238.78608 | -54.06142 | 20+30+50 | Triggered 2021-06-07 |
| 04099 | Fiamma Capitanio | 80702314 | Transient black hole XRB | 2x30 + 20 | |||
| 04118 | Jingyi Wang | 80702315 | Unknown BHB | 3x20 | |||
| 04152 | Navin Sridhar | 80702316 | Unknown XRB | 3x20 | |||
| 04155 | Riley Conners | 80702317 | 4U 1543-475 | 236.784486 | -47.669523 | 4x20 | Triggered 2021-06-12 |
| 04163 | Jeroen Homan | 80702318 | 4U 1820-30 | 275.91904 | -30.361278 | 3x20 | Triggered 2021-06-12 |
| 04181 | Gugleilmo Mastroserio | 80701319 | BH transient | 30 | |||