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: 2024-11-12
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
09029	Kaya Mori	80960303-15	Polar WD in high accretion			13 x 20	Multi-cycle ToO program
09029	Kaya Mori	80960301	VV Pup	123.778337	-19.054935	20	Triggered 2023-06-08
09029	Kaya Mori	80960302	V1033 Cen	175.344731	-64.170655	20	Triggered 2024-02-26
09029	Kaya Mori	80960303	AM Her	274.055228	49.867989	60	Triggered 2024-10-19 Coordinated with XRISM
09108	Reshmi Mukherjee	80902634	PKS 0446+11	72.282	11.357	2 x 40	Triggered 2024-01-10 Coordinated with Swift and VERITAS
09138	Marina Orio	80902337	New Symbotic Nova			3 x 20	Multi-cycle ToO program
09180	Megumi Shidatsu	80901338	Disk-wind black hole binary			50	Coordinated with XRISM
09235	Aarran Shaw	80902342	GX 339-4	255.70579	-48.78975	2 x 20	Triggered 2024-02-22 Coordinated with JWST
09235	Aarran Shaw	80902343	Black hole LMXB			2 x 20	Coordinated with JWST
10066	Jennifer Sokoloski	81002321	T CrB	239.87567	25.92017	2x20	Coordinated with NICER
10087	Gaurava Jaisawal	81001322	4U 1820-30	275.91904	-30.36128	45	Coordinated with NICER triggered 2024-07-02
10090	Kaya Mori	81001323	GC X-RAY Transient 1			20	Multi-cycle ToO program
10090	Kaya Mori	81001324	GC X-RAY Transient 2			20
10097	Raffaella Margutti	81002425	Interacting SN			3x40	Coordinated with Swift
10100	Raffaella Margutti	81002426	Compact Object GW1			4x40
10100	Raffaella Margutti	81001427	Compact Object GW2			40
10103	Yuhan Yao	81001628	ZTF24aaoxmyb	252.725603	32.876719	50	Coordinated with Swift Triggered 2024-07-01
10103	Yuhan Yao	81001629	TDE2			50	Coordinated with Swift
10112	Qi Feng	81002630	Candidate Neutrino Blazar			2x40	Coordinated with Swift & VERITAS
10134	Riccardo Middei	81001631	MRK 421	166.11379	38.20883	40	Coordinated with IXPE ToO & MAGIC/VERITAS Observe one of these targets
10134	Riccardo Middei	81001632	MRK 501	253.46758	39.76017	0
10134	Riccardo Middei	81001633	1ES 0033+595	8.969	59.8345	0
10134	Riccardo Middei	81001634	1ES 1959+650	299.99938	65.1485	0
10134	Riccardo Middei	81001635	1ES 1218+304	185.34142	30.177	0
10134	Riccardo Middei	81001636	1ES 1011+496	153.76725	49.43353	0
10171	Jiachen Jiang	81002337	SWIFT J0243.6+6124	40.91846	61.43439	3x20	Coordinated with NICER
10182	Dheeraj Pasham	81002638	Relativistic TDE			20+20+40	Coordinated with NICER
10185	Kirill Sokolovsky	81002339	New Nova			3x50
10191	Mirko Krumpe	81002640	Changing look AGN			2x150	Coordinated with XMM
10198	Andrea Gokus	81001641	High-Z Blazar			100
10216	Javier Garcia	81002342	BHB outburst monitoring			3x30 10x20 2x30 3x50	Coordinated with NICER
10220	Megumi Shidatsu	81001343	Low inclination Black Hole Binary			30	Coordinated with XRISM & Swift No XRISM ToO selected - program suspended
10220	Megumi Shidatsu	81001344	High inclination Black Hole Binary			30
10245	Guglielmo Mastroserio	81002345	GX 339-4	255.70579	-48.78975	3x20	Coordinated with IXPE
10246	Daniel Lawther	81001646	MRK 590	33.63983	-0.76672	90	Coordinated with XMM Triggered 2024-06-29
10249	Sean Pike	81002347	MAXI J1752-457	268.268	-45.869	2x20	Triggered 2024-11-10
10249	Sean Pike	81002348	Unknown MAXI Source 2			2x20
10249	Sean Pike	81002349	Unknown MAXI Source 3			2x20
10251	Peter Kosec	81002350	Hercules X-1	254.45754	35.34236	2x20	Coordinated with Chandra Triggered 2024-08-15
10257	Amruta Jaodand	81002351	X-BNS			100+75+75
10267	Jon Miller	81001652	PG 1211+143	183.57362	14.05367	80	Coordinated with XRISM No XRISM ToO selected - program suspended
10267	Jon Miller	81001653	MRK 817	219.092	58.79428	100
10268	Benjamin Coughenour	81001354	Transient BH XRB			50	Coordinated with NICER
10309	Oluwashina Adegoke	81002355	Blackhole Binaries			3x25	Coordinated with NICER

Joint NuSTAR/Chandra GO ToO programs
25400276	Kosec	81002301	LMC/SMC ULX			3x20
25400338	Neilsen	81002302	Black Hole Transient			4x25
25500335	Margutti	81002403	AT2024qfm	350.347753	11.942232	2x25 + 2x40	Triggered 2024-08-01
26400066	Peter Kosec	81102301	Magellanic Clouds ULX transient			3x20	Chandra cycle-26 begins on 2026-01-01
26400115	Kaya Mori	81102302	GC VFXT			2x20	Chandra cycle-26 begins on 2026-01-01
26400240	Joey Neilsen	81102303	Black hole state transition			4x25	Chandra cycle-26 begins on 2026-01-01
26500151	Raffaella Margutti	81102404	Interacting SN			2x50	Chandra cycle-26 begins on 2026-01-01

Joint NuSTAR/XMM-Newton GO ToO programs
090332	Rafaella Margutti	80802406	AT2024wpp	40.522853	-16.956397	2x25+2x40	Triggered 2024-11-14
094004	Norbert Schartel	81001611	RQ AGN outburst 1			50	Coordinated with SALT or HET
094004	Norbert Schartel	81001612	RQ AGN outburst 1			50	Coordinated with SALT or HET
094084	Rafaella Margutti	81002513	SNinteracting			2x50
094134	Erin Kara	81001614	Mrk 817	219.091958	58.794269	60	Coordinated with HST
094209	Michael Nowak	81001315	4U 1957+11	299.850042	11.708294	20
094218	Murray Brightman	81001516	NGC 4045 ULX	180.676208	1.96925	100	Coordinated with Swift monitoring
094376	Samuel Barnier	81002317	BH XRB outburst			10x20
094484	Maxime Parra	81002318	BH LMXB outburst			10x20	Coordinated with Swift monitoring

Joint NuSTAR/INTEGRAL GO ToO programs
2140005	Maria Teresa Fiocchi	81001319	Ultra-compact XRB			25
2140012	Ingo Kreykenbohm	81001320	Transient pulsar			40

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
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
06057	Fiamma Capitanio	80902313	SwiftJ1727.8-1613	261.930583	-16.205322	4x20	Triggered 2023-09-04 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	SwiftJ1727.8-1613	261.930583	-16.205322	30	Triggered 2023-08-28
06203	Paul Draghis	80901321	BH transient #2			30
07041	Alice Borghese	81001304	Magnetar outburst #1			20
07041	Alice Borghese	81001304	Magnetar outburst #2			20
07082	Teruaki Enoto	81002306	1E 1841-045	280.330596	-4.936433	20+30+50	Triggered 2024-10-04
07126	Gugleilmo Mastroserio	81001307	Black hole transient			50
07141	Muryel Guolo	81001608	AT2024kmq	180.65531	35.39312	50	Triggered 2024-10-28
07164	Keigo Fukumura	81002309	MAXI J1810-222	273.17	-22.31	3x20
07170	Edward Nathan	81001310	GRS1915+105	288.798167	10.945806	30

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

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