The Chandra schedule

3-day Schedule

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This page shows 3 days of the Chandra schedule, either side of today, and the total science exposure time for these observations is 4 days and 19 hours. The size of the circles indicate the exposure time, and the color shows whether the observation has been done, is running now, or is in the future; the same colors are used in the table below. For repeated observations it can be hard to make out what is going on, since the circles overlap! The shaded regions trace the Milky Way galaxy. The points are plotted in the Equatorial coordinate system, using the Aitoff projection.

Target	Object type	Exposure time	Start	Instrument	Joint with	Turnaround	Constraints	Right Ascension	Declination	Constellation
BOSS1348	Spectroscopic Binary	4 hours and 5 minutes	4 days ago	ACIS-I	n/a	None	n/a	13^h 48^m 14.4^s	+23° 58' 48.0"	Boo
SDSS J101639.87+194048.4	Unidentified	3 hours and 30 minutes	3 days ago	ACIS-S	HST	None	n/a	10^h 16^m 39.9^s	+19° 40' 48.4"	Leo
SN2025sei	Unidentified	3 hours and 3 minutes	3 days ago	ACIS-S	n/a	Intermediate	Time Critical, Monitoring	17^h 48^m 59.4^s	+25° 29' 44.9"	Her
SDSSJ093404.74+195617.6	Seyfert 1 Galaxy	2 hours and 46 minutes	3 days ago	ACIS-S	n/a	None	n/a	09^h 34^m 04.7^s	+19° 56' 17.6"	Leo
SN2025sei	Unidentified	2 hours and 50 minutes	3 days ago	ACIS-S	n/a	Intermediate	Time Critical, Monitoring	17^h 48^m 59.4^s	+25° 29' 44.9"	Her
Perseus cluster	Cluster of Galaxies	5 hours and 30 minutes	3 days ago	ACIS-I	n/a	None	Time Critical	03^h 19^m 48.2^s	+41° 30' 42.2"	Per
ZwCl 0857.9+2107	Unidentified	2 hours and 46 minutes	3 days ago	ACIS-S	NRAO	None	n/a	09^h 00^m 36.8^s	+20° 53' 40.1"	Cnc
CAL-ER (41752)		50 minutes	2 days ago	n/a	n/a	n/a	n/a	09^h 04^m 18.3^s	+19° 58' 54.3"	n/a
CAL-ER (41749)		16 minutes and 40 seconds	2 days ago	n/a	n/a	n/a	n/a	09^h 14^m 16.7^s	+17° 25' 17.9"	n/a
SNR G1.9+0.3	SuperNova Remnant	4 hours and 1 minute	2 days ago	ACIS-S	n/a	None	n/a	17^h 48^m 45.0^s	-27° 10' 00.1"	Sgr
PG 1004+130	Seyfert 1 Galaxy	2 hours and 57 minutes	2 days ago	ACIS-S	n/a	None	n/a	10^h 07^m 26.1^s	+12° 48' 56.1"	Leo
SNR G1.9+0.3	SuperNova Remnant	3 hours and 51 minutes	2 days ago	ACIS-S	n/a	None	n/a	17^h 48^m 45.0^s	-27° 10' 00.1"	Sgr
ESO324-008	Emission-line galaxy	1 hour and 40 minutes	1 day ago	ACIS-S	n/a	None	n/a	13^h 20^m 54.0^s	-39° 16' 43.4"	Cen
Orion Nebula snapshot 4	Unidentified	3 hours and 20 minutes	1 day ago	ACIS-I	JWST	None	Time Critical	05^h 35^m 16.7^s	-05° 22' 45.0"	Ori
Orion Nebula snapshot 5	Unidentified	3 hours and 20 minutes	1 day ago	ACIS-I	JWST	None	Time Critical	05^h 35^m 16.7^s	-05° 22' 45.0"	Ori
Perseus cluster	Cluster of Galaxies	5 hours and 8 minutes	22 hours ago	ACIS-I	n/a	None	Time Critical	03^h 19^m 48.2^s	+41° 30' 42.2"	Per
Orion Nebula snapshot 6	Unidentified	3 hours and 3 minutes	17 hours ago	ACIS-I	JWST	None	Time Critical	05^h 35^m 16.7^s	-05° 22' 45.0"	Ori
SDSSJ085640.78+105755.8	Seyfert 1 Galaxy	2 hours and 46 minutes	13 hours ago	ACIS-S	n/a	None	n/a	08^h 56^m 40.8^s	+10° 57' 55.8"	Cnc
[vD2023]1	Unidentified	3 hours and 20 minutes	10 hours ago	ACIS-I	n/a	None	n/a	02^h 41^m 45.7^s	-08° 21' 02.0"	Cet
Perseus cluster	Cluster of Galaxies	13 hours and 47 minutes	now	ACIS-I	n/a	None	Time Critical	03^h 19^m 48.2^s	+41° 30' 42.2"	Per
CAL-ER (41747)		50 minutes	in 7 hours	n/a	n/a	n/a	n/a	09^h 03^m 60.0^s	+20° 00' 00.0"	n/a
CAL-ER (41746)		50 minutes	in 10 hours	n/a	n/a	n/a	n/a	22^h 46^m 24.0^s	+26° 23' 60.0"	n/a
CAL-ER (41745)		1 hour and 35 minutes	in 14 hours	n/a	n/a	n/a	n/a	02^h 00^m 00.0^s	+43° 00' 00.0"	n/a
ZwCl 0857.9+2107	Unidentified	4 hours and 26 minutes	in 19 hours	ACIS-S	NRAO	None	n/a	09^h 00^m 36.8^s	+20° 53' 40.1"	Cnc
PGC101434	Unidentified	2 hours and 46 minutes	in 24 hours	ACIS-S	n/a	None	n/a	00^h 32^m 18.6^s	+15° 00' 14.2"	Psc
ZwCl 0857.9+2107	Unidentified	2 hours and 46 minutes	in 1 day	ACIS-S	NRAO	None	n/a	09^h 00^m 36.8^s	+20° 53' 40.1"	Cnc
PGC101434	Unidentified	2 hours and 46 minutes	in 1 day	ACIS-S	n/a	None	n/a	00^h 32^m 18.6^s	+15° 00' 14.2"	Psc
ZwCl 0857.9+2107	Unidentified	3 hours and 16 minutes	in 1 day	ACIS-S	NRAO	None	n/a	09^h 00^m 36.8^s	+20° 53' 40.1"	Cnc
[vD2023]1	Unidentified	5 hours and 16 minutes	in 2 days	ACIS-I	n/a	None	n/a	02^h 41^m 45.7^s	-08° 21' 02.0"	Cet
ZwCl 0857.9+2107	Unidentified	4 hours and 13 minutes	in 2 days	ACIS-S	NRAO	None	n/a	09^h 00^m 36.8^s	+20° 53' 40.1"	Cnc
G 132-50	High Proper Motion Star	1 hour and 23 minutes	in 2 days	ACIS-S	n/a	None	n/a	01^h 03^m 40.3^s	+40° 51' 26.7"	And
CMZ Molecular Cloud	Unidentified	3 hours and 28 minutes	in 2 days	ACIS-I	n/a	None	n/a	17^h 46^m 12.1^s	-28° 53' 19.3"	Sgr
RMJ093723.8+125312.3	Unidentified	2 hours and 46 minutes	in 2 days	ACIS-I	n/a	None	n/a	09^h 37^m 23.9^s	+12° 53' 12.3"	Leo
GS 1354-64	High Mass X-ray Binary	8 hours and 20 minutes	in 2 days	ACIS-S with High Energy Transmission Grating (HETG)	NuSTAR,NRAO,NOAO	Intermediate	Time Critical, Monitoring	13^h 58^m 09.7^s	-64° 44' 05.3"	Cir
BOSS1348	Spectroscopic Binary	2 hours and 6 minutes	in 3 days	ACIS-I	n/a	None	n/a	13^h 48^m 14.4^s	+23° 58' 48.0"	Boo
CAL-ER (41744)		33 minutes and 20 seconds	in 3 days	n/a	n/a	n/a	n/a	09^h 44^m 24.0^s	+14° 18' 00.0"	n/a
CAL-ER (41743)		33 minutes and 20 seconds	in 3 days	n/a	n/a	n/a	n/a	09^h 03^m 60.0^s	+20° 00' 00.0"	n/a
CAL-ER (41742)		50 minutes	in 3 days	n/a	n/a	n/a	n/a	23^h 36^m 48.0^s	+22° 30' 00.0"	n/a
CAL-ER (41741)		1 hour and 31 minutes	in 3 days	n/a	n/a	n/a	n/a	02^h 00^m 00.0^s	+43° 00' 00.0"	n/a
CAL-ER (41740)		16 minutes and 40 seconds	in 3 days	n/a	n/a	n/a	n/a	09^h 03^m 60.0^s	+20° 00' 00.0"	n/a
CAL-ER (41739)		16 minutes and 40 seconds	in 3 days	n/a	n/a	n/a	n/a	09^h 56^m 00.0^s	+13° 00' 00.0"	n/a