NuSTAR SOC - ToO programs

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: 2023-05-22
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	PI	ObsID	Target Name	J2000 RA (deg)	J2000 Dec (deg)	Exposure (ks)	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 Triggered 2021-12-17
07221	Somalwar	80702614	TC0052	307.6972094	4.225268866	3 x 20	Coordinated with Swift Triggered 2022-03-08
08003	Mori	80802325	GC X-ray Transient			2x20
08033	Ballhausen	80801326	RX J0440.9+4431	70.247207	44.530349	50	Triggered 2023-01-02
08041	Jiang	80801327	4U 1630-472	248.506708	-47.3930	30	Triggered 2023-03-07
08079	Coughenour	80801328	AT2019wey	68.846980	55.376190	50	Coordinated with NICER Triggered 2022-12-12
08107	Krucker	80802200	The SUN			2x25
08110	Paliya	80801629	Swift-BAT blazar 1			20
08110	Paliya	80801630	Swift-BAT blazar 2			20
08115	Miller	80801631	Bright TDE			50
08121	Mondal	80801332	XMM J173029-330920	262.622034	-33.155719	30	Triggered 2023-04-20
08125	Jaisawal	80801333	4U 1820-30	275.91904	-30.36128	45	Coordinated with NICER
08131	Krumpe	80801634	AGN flux drop			100
08136	Sokolovsky	80801335	PNV J17224490-4137160	260.6876667	-41.6212500	60	Coordinated with XMM-Newton Triggered 2023-04-20
08166	Feng	80802636	B3 2247+381	342.524	38.410	2x40	Triggered 2022-09-24 Coordinated with Swift & VERITAS
08167	Krumpe	80801637	AGN-ignition 1			50
08167	Krumpe	80801638	AGN ignition 2			50
08171	McBride	80801639	TXS 2320+343	350.683393	34.603854	40	Triggered 2022-12-26
08171	McBride	80801640	ICECUBE 2			40
08201	Shaw	80801341	GX 339-4	255.70575	-48.78978	20	Triggered 2022-09-06 Coordinated with JWST
08201	Shaw	80801342	Generic Black Hole LMXB			20	Coordinated with JWST
08211	Arbet-Engels	80801643	Mrk 421	166.113790	38.208830	40	Triggered 2023-05-12 Coordinated with MAGIC
08219	Draghis	80802344	XTE J2012+381	303.1573	38.1837	2x30	Triggered 2022-12-26
08219	Draghis	80802345	XTE J1901+014	285.410	1.393	30	Triggered 2023-02-17 Second observation dropped
08219	Draghis	80802346	SLX 1746-331	267.4539	-33.2032	3x30	Triggered 2023-03-10 Third 30ks observation added
08226	Pike	80801347	MAXI J0655-013	103.7930	-1.5310	40	Triggered 2022-06-19
08226	Pike	80802348	Unknown MAXI source 2			2x20
08226	Pike	80802349	Unknown MAXI source 3			2x20
08227	Arbet-Engels	80801650	1ES 2344+514 low state	356.77017	51.70497	20	triggered 2022-07-28 Coordinated with XMM and MAGIC
08227	Arbet-Engels	80801651	1ES 2344+514 high state	356.77017	51.70497	20
08233	Lawther	80802652	Mrk 590	33.63992	-0.76675	20+20+60+50	Coordinated with XMM-Newton & NICER
08234	Haemmerich	80801653	Flaring Blazar			50	Coordinated with Gehrels-Swift
08236	Bonnoli	80801654	New VHE FSRQ			40
08246	Jaodand	80802755	Binary NS merger afterglow			100+75+75
09029	Kaya Mori	80960301	Polar WD in high accretion			15 x 20	NuSTAR cycle-9 begins on 2023-06-01
09047	Mariko Kimura	80902330	SS Cyg	325.67833	43.58608	100 + 30	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with XRISM
09050	Sam Krucker	80910201	The Sun			2 x 25	NuSTAR cycle-9 begins on 2023-06-01
09085	Sibasish Laha	80902632	1ES 1927+654	291.831208	65.565103	4 x 40	Triggered 2023-05-22 Coordinated with NICER
09094	Joseph Neilsen	80902333	Black Hole Transient			5 x 20	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with NICER
09108	Reshmi Mukherjee	80902634	Candidate neutrino blazar			2 x 40	NuSTAR cycle-9 begins on 2023-06-01
09109	Dheeraj Pasham	80902635	Relativistic TDE			2x20 + 40	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with NICER
09124	Amruta Jaodand	80902336	Binary neutron star merger			100 + 2x75	NuSTAR cycle-9 begins on 2023-06-01
09138	Marina Orio	80902337	New Symbotic Nova			3 x 20	NuSTAR cycle-9 begins on 2023-06-01
09180	Megumi Shidatsu	80901338	Disk-wind black hole binary			50	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with XRISM
09191	Svetlana Jorstad	80901639	Flaring blazar 1			20	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with Gehrels-Swift and IXPE
09191	Svetlana Jorstad	80901640	Flaring blazar 2			20
09198	Kirill Sokolovsky	80901341	New Nova			60	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with XMM-Newton
09235	Aarran Shaw	80902342	GX 339-4	255.70579	-48.78975	2 x 20	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with JWST
09235	Aarran Shaw	80902343	Black hole LMXB			2 x 20	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with JWST
09251	Koji Mukai	80901344	T CrB	239.87567	25.92017	40	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with XRISM
09257	Sean Pike	80911301	Unknown MAXI source 1			2 x 20	NuSTAR cycle-9 begins on 2023-06-01
		80912301	Unknown MAXI source 2			2 x 20
		80913301	Unknown MAXI source 3			2 x 20
09271	Jennifer Sokoloski	80902345	T CrB	239.87567	25.92017	2 x 20	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with NICER
09274	Oluwashina Adegoke	80902346	Black hole binary			3 x 25	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with NICER
09276	Javier Garcia	80901347	Black hole transient			30	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with NICER
09289	James Steiner	80902348	Black hole transient			4 x 20	NuSTAR cycle-9 begins on 2023-06-01 Coordinated with NICER

Joint NuSTAR/Chandra GO ToO programs
23400247	Neilsen	80802303	Black Hole Transient			4 x 25
23500541	Chornock	80802504	SN2012ap	75.057167	-3.347560	2 x 50	Triggered 2022-12-28
24400072	Mori	80902301	GC transient			2x20
24400242	Neilsen	80902302	Black Hole transient			4x25
24500203	Brethauer	80902503	SN2022xxf	172.524751	9.282604	2x50	Triggered 2023-04-24
24500280	Matthews	80902404	AT2022tsd	50.045282	8.748878	2x25,2x40	Triggered 2022-10-07

Joint NuSTAR/XMM-Newton GO ToO programs
086127	Allesandro Papitto	80601304	Terzan 5	267.02083	-24.7800	60	Triggered 2023-03-01
088008	Norbert Schartel	80701608	RX J0128.1-1848	22.0280	-18.808625	50	Triggered 2022-11-29 Coordinated with SALT or HET
088008	Norbert Schartel	80701609	AGN outburst 2			50	Coordinated with SALT or HET
088054	Pierre-Olivier Petrucci	80702310	BH LMXB			10x20
088218	Nanda Rea	80702311	SGR J1935+2154	293.7320	21.896720	50+40+80	Triggered 2022-10-17
088470	Alessandro Papitto	80701312	SAX J1808.4-3658	272.114750	-36.978970	120	Triggered 2022-08-20 Coordinated with IXPE
090022	Norbert Schartel	80801601	AGN Minimum 1			80	Coordinated with HST
090022	Norbert Schartel	80801602	AGN Minimum 2			80	Coordinated with HST
090023	Norbert Schartel	80801603	PG 0043+039	11.446792	4.173156	60	Coordinated with HST and HET/SALT Triggered 2022-06-16
090067	Adam Ingram	80802309	GRS 1915+105	288.798125	10.945778	3x30	Coordinated with IXPE
090245	Missagh Mehdipour	80801604	AGN obscuration			30	Coordinated with HST
090251	Daniel Stern	80860601	eROSITA-fader1			20
		80860602	eROSITA-fader6			20
		80860603	eROSITA-fader6			20
		80860604	eROSITA-fader6			20
		80860605	eROSITA-fader6			20
		80860606	eROSITA-fader6			20
090284	Javier Garcia	80801305	BH transient			40
090332	David Matthews	80802406	FBOT			2x25+2x40
090357	Sergio Campana	80801507	GW counterpart1			60	Coordinated with HST and NRAO
090357	Sergio Campana	80801508	GW counterpart2			60
092118	Raffaella Margutti	80902505	SNinteracting			2x50
092270	Elias Kammoun	80902606	SMSS J114447.77-430859.3	176.199	-43.14984	2x80
092317	Alessandro Papitto	80901307	Accreting ms pulsar			120	Coordinated with IXPE
092331	Missagh Mehdipour	80901608	NGC 3516	166.697763	72.56869	60	Coordinated with HST Triggered 2023-04-23
092346	Arianna Miraval Zanon	80901309	Transitional ms pulsar			60	Coordinated with VLA
092410	Erin Kara	80902610	Mrk 817	219.09200858	58.7942763	60	Coordinated with HST Triggered 2023_04-24

Joint NuSTAR/INTEGRAL GO ToO programs
1840002	Thomas Siegert	80701501	NS merger			100
1840005	Zhaosheng Li	80701302	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
1940025	Thomas Siegert	80801502	GW Neutron star merger			100
2040002	Thomas Siegert	80901324	NS merger			100
2040026	Maria Teresa Fiocchi	80901325	Ultracompact XRB in outburst			25

Joint NuSTAR/Swift GO ToO programs
1821098	Kirill Sokolovsky	80801310	New Nova			40
1821161	Maria-Carla Nicotra	80801311	FRB1			20
1821161	Maria-Carla Nicotra	80801312	FRB2			20
1922051	Liliana Rivera Sandoval	80902423	Fast-evolving luminous transient			3x20	Swift cycle-19 begins on 2023-04-01

Joint NuSTAR/NICER GO ToO programs
04163	Jeroen Homan	80702318	4U 1820-30	275.91904	-30.361278	3x20	Triggered 2021-06-12
05001	Fiamma Capitanio	80802313	4U1630-47	248.5067083	-47.3930	2x30 + 20	Triggered 2022-08-22 Coordinated with IXPE
05001	Fiamma Capitanio	80802314	Transient XRB-2			2x30 + 20	Coordinated with IXPE
05001	Fiamma Capitanio	80802315	Transient XRB-3			2x30 + 20	Coordinated with IXPE
05065	Riley Connors	80802316	Transient BH Binary			4x20
05076	Teruaki Enoto	80802317	SGR J1935+2154	293.7320	21.89672	50+50	Triggered 2022-10-12 Coordinated with DSN
05079	Alice Borghese	80801318	Magnetar Outburst-1			20
05079	Alice Borghese	80801319	Magnetar Outburst-2			20
05099	Federico Garcia	80802320	GX 339-4	255.705754	-48.78975	3x20	Triggered 2022-08-30
05106	Filippo D'Ammando	80801605	Blazar			40
05118	Jingyi Wang	80802321	IGR J17091-3624	257.2833	-36.4067	3x20	Triggered 2022-04-12
05131	Joseph Neilsen	80801322	GRS 1915+105	288.798167	10.945806	25
05140	Guglielmo Mastroserio	80801323	BH transient			50
05172	Javier Garcia	80801324	IGR J17091-3624	257.2833	-36.4067	100	Triggered 2022-08-17
06039	Teruaki Enoto	80902311	Magnetar Outburst			20+30+50	Coordinated with DSN
06057	Fiamma Capitanio	80902312	4U 1630-47	248.50671	-47.39300	3x20 + 20	Triggered 2023-03-07 Coordinated with IXPE
06078	Yuhan Yao	80901615	Tidal Disruption Event			50
06113	Adam Ingram	80902316	GRS 1915+105	288.798167	10.945806	3x20	Coordinated with IXPE
06141	Jingyi Wang	80902317	Transient BH Binary			3x20
06143	James Steiner	80902318	Cygnus X-1	299.590333	35.201611	3x20	Coordinated with IXPE Triggered 2023-04-07
06197	Joseph Neilsen	80901320	GRS 1915+105	288.798167	10.945806	25
06203	Paul Draghis	80901321	BH transient #1			30
06203	Paul Draghis	80901321	BH transient #2			30

NuSTAR ToO targets approved within the NuSTAR, Chandra, XMM-Newton, Swift, NICER, and INTEGRAL General Observer programs

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