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 5 days. 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
PJ011646	Unidentified	4 hours and 26 minutes	4 days ago	ACIS-I	n/a	None	n/a	01^h 16^m 46.6^s	-24° 37' 02.7"	Cet
Perseus cluster	Cluster of Galaxies	11 hours and 56 minutes	4 days ago	ACIS-I	n/a	None	Time Critical	03^h 19^m 48.2^s	+41° 30' 42.2"	Per
CAL-ER (41756)		50 minutes	3 days ago	n/a	n/a	n/a	n/a	08^h 32^m 31.9^s	+25° 50' 54.7"	n/a
CAL-ER (41754)		50 minutes	3 days ago	n/a	n/a	n/a	n/a	00^h 36^m 11.4^s	+28° 25' 26.5"	n/a
Orion Nebula snapshot 1	Unidentified	3 hours and 19 minutes	3 days ago	ACIS-I	JWST	None	Time Critical	05^h 35^m 16.7^s	-05° 22' 45.0"	Ori
2RXS J083147.5+054502	Unidentified	2 hours and 54 minutes	2 days ago	ACIS-S	n/a	None	n/a	08^h 31^m 47.9^s	+05° 45' 18.7"	Hya
PJ011646	Unidentified	3 hours and 51 minutes	2 days ago	ACIS-I	n/a	None	n/a	01^h 16^m 46.6^s	-24° 37' 02.7"	Cet
Orion Nebula snapshot 2	Unidentified	3 hours and 15 minutes	2 days ago	ACIS-I	JWST	None	Time Critical	05^h 35^m 16.7^s	-05° 22' 45.0"	Ori
ESO221-009	Active Galaxy Nucleus Candidate	1 hour and 40 minutes	2 days ago	ACIS-S	n/a	None	n/a	13^h 50^m 44.6^s	-48° 56' 49.0"	Cen
Orion Nebula snapshot 3	Unidentified	3 hours and 2 minutes	2 days ago	ACIS-I	JWST	None	Time Critical	05^h 35^m 16.7^s	-05° 22' 45.0"	Ori
BOSS1348	Spectroscopic Binary	4 hours and 5 minutes	2 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	1 day 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	1 day 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	1 day 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	22 hours 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	6 hours and 4 minutes	19 hours 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 55 minutes	13 hours ago	ACIS-S	NRAO	None	n/a	09^h 00^m 36.8^s	+20° 53' 40.1"	Cnc
CAL-ER (41752)		50 minutes	10 hours ago	n/a	n/a	n/a	n/a	09^h 04^m 24.0^s	+20° 00' 00.0"	n/a
CAL-ER (41751)		50 minutes	6 hours ago	n/a	n/a	n/a	n/a	22^h 46^m 24.0^s	+26° 23' 60.0"	n/a
CAL-ER (41750)		1 hour and 36 minutes	now	n/a	n/a	n/a	n/a	02^h 00^m 00.0^s	+43° 00' 00.0"	n/a
CAL-ER (41749)		16 minutes and 40 seconds	in 25 minutes	n/a	n/a	n/a	n/a	09^h 03^m 60.0^s	+20° 00' 00.0"	n/a
CAL-ER (41748)		16 minutes and 40 seconds	in 2 hours	n/a	n/a	n/a	n/a	09^h 24^m 00.0^s	+15° 00' 00.0"	n/a
SNR G1.9+0.3	SuperNova Remnant	4 hours and 10 minutes	in 3 hours	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 46 minutes	in 7 hours	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	4 hours and 10 minutes	in 11 hours	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	in 15 hours	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	in 18 hours	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	in 21 hours	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	in 1 day	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	in 1 day	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	in 1 day	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	in 2 days	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	in 2 days	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 2 days	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 2 days	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 3 days	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 3 days	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 3 days	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 3 days	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 3 days	ACIS-S	n/a	None	n/a	00^h 32^m 18.6^s	+15° 00' 14.2"	Psc