The Chandra schedule

3-day Schedule

The map of the observations requires JavaScript, but it appears that it is not available (or the page is taking some time to load).

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 17 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
Perseus cluster	Cluster of Galaxies	4 hours and 10 minutes	3 days ago	ACIS-I	n/a	None	Time Critical	03^h 19^m 48.2^s	+41° 30' 42.2"	Per
AT 2025abcr	Unidentified	8 hours and 14 minutes	3 days ago	ACIS-S	n/a	Slow	Time Critical, Monitoring	01^h 46^m 55.4^s	-15° 22' 15.7"	Cet
Gaia DR2 3412770125660814080	High Proper Motion Star	3 hours and 51 minutes	3 days ago	ACIS-S	n/a	None	n/a	04^h 49^m 35.9^s	+21° 45' 39.1"	Tau
Cygnus X-2	Low Mass X-ray Binary	8 hours and 45 minutes	2 days ago	ACIS-S with High Energy Transmission Grating (HETG)	n/a	None	n/a	21^h 44^m 41.2^s	+38° 19' 17.1"	Cyg
Perseus cluster	Cluster of Galaxies	4 hours and 13 minutes	2 days ago	ACIS-I	n/a	None	Time Critical	03^h 19^m 48.2^s	+41° 30' 42.2"	Per
CAL-ER (41893)		50 minutes	2 days ago	n/a	n/a	n/a	n/a	05^h 00^m 42.7^s	+25° 07' 16.9"	n/a
CAL-ER (41889)		33 minutes and 20 seconds	1 day ago	n/a	n/a	n/a	n/a	23^h 20^m 06.0^s	+28° 35' 00.2"	n/a
NGC4548	LINER-type Active Galaxy Nucleus	3 hours and 40 minutes	1 day ago	ACIS-S	n/a	None	n/a	12^h 35^m 26.5^s	+14° 29' 46.0"	Com
Perseus cluster	Cluster of Galaxies	4 hours and 31 minutes	1 day ago	ACIS-I	n/a	None	Time Critical	03^h 19^m 48.2^s	+41° 30' 42.2"	Per
EXO 0748-676	Low Mass X-ray Binary	3 hours and 57 minutes	20 hours ago	ACIS-S	Swift	Slow	Time Critical, Monitoring	07^h 48^m 33.7^s	-67° 45' 07.7"	Vol
Perseus cluster	Cluster of Galaxies	4 hours and 26 minutes	14 hours ago	ACIS-I	n/a	None	Time Critical	03^h 19^m 48.2^s	+41° 30' 42.2"	Per
CAL-ER (41884)		15 minutes	9 hours ago	n/a	n/a	n/a	n/a	21^h 48^m 00.0^s	+33° 00' 00.0"	n/a
EXO 0748-676	Low Mass X-ray Binary	4 hours and 10 minutes	8 hours ago	ACIS-S	Swift	Slow	Time Critical, Monitoring	07^h 48^m 33.7^s	-67° 45' 07.7"	Vol
CAL-ER (41883)		15 minutes	3 hours ago	n/a	n/a	n/a	n/a	21^h 48^m 00.0^s	+33° 00' 00.0"	n/a
Perseus cluster	Cluster of Galaxies	4 hours and 26 minutes	now	ACIS-I	n/a	None	Time Critical	03^h 19^m 48.2^s	+41° 30' 42.2"	Per
2MASX J17345436+5045210	Galaxy	2 hours and 46 minutes	in 3 hours	ACIS-S	n/a	None	n/a	17^h 34^m 54.3^s	+50° 45' 21.3"	Dra
Perseus cluster	Cluster of Galaxies	3 hours and 3 minutes	in 7 hours	ACIS-I	n/a	None	Time Critical	03^h 19^m 48.2^s	+41° 30' 42.2"	Per
Center of COSMOS-Web	Unidentified	4 hours and 10 minutes	in 10 hours	ACIS-I	n/a	None	n/a	10^h 00^m 59.1^s	+02° 02' 47.3"	Sex
CAL-ER (41882)		35 minutes	in 15 hours	n/a	n/a	n/a	n/a	05^h 47^m 60.0^s	+22° 00' 00.0"	n/a
Center of COSMOS-Web	Unidentified	4 hours and 10 minutes	in 16 hours	ACIS-I	n/a	None	n/a	10^h 00^m 59.1^s	+02° 02' 47.3"	Sex
CAL-ER (41881)		50 minutes	in 21 hours	n/a	n/a	n/a	n/a	05^h 47^m 60.0^s	+23° 00' 00.0"	n/a
CAL-ER (41880)		50 minutes	in 24 hours	n/a	n/a	n/a	n/a	14^h 03^m 07.6^s	-21° 51' 56.2"	n/a
CAL-ER (41879)		50 minutes	in 1 day	n/a	n/a	n/a	n/a	10^h 07^m 36.0^s	+03° 36' 00.0"	n/a
CAL-ER (41878)		15 minutes	in 1 day	n/a	n/a	n/a	n/a	11^h 06^m 07.1^s	-10° 31' 22.1"	n/a
CAL-ER (41877)		15 minutes	in 1 day	n/a	n/a	n/a	n/a	17^h 56^m 37.3^s	+71° 54' 40.7"	n/a
ZTF J0546+3843	Cataclysmic Binary	5 hours and 33 minutes	in 1 day	ACIS-S	n/a	None	n/a	05^h 46^m 27.4^s	+38° 43' 13.4"	Aur
GRB 221009A	Gamma-ray Burst	4 hours and 26 minutes	in 2 days	ACIS-S	n/a	None	Time Critical, Monitoring	19^h 13^m 03.5^s	+19° 46' 24.2"	Sge
HEP G173.810-01.525	Unidentified	2 hours and 46 minutes	in 2 days	ACIS-I	n/a	None	n/a	05^h 23^m 57.4^s	+33° 18' 48.4"	Aur
GRB 221009A	Gamma-ray Burst	4 hours and 26 minutes	in 2 days	ACIS-S	n/a	None	Time Critical, Monitoring	19^h 13^m 03.5^s	+19° 46' 24.2"	Sge
HEP G173.766-01.783	Unidentified	2 hours and 46 minutes	in 2 days	ACIS-I	n/a	None	n/a	05^h 22^m 49.2^s	+33° 12' 14.2"	Aur
GRB 221009A	Gamma-ray Burst	4 hours and 26 minutes	in 2 days	ACIS-S	n/a	None	Time Critical, Monitoring	19^h 13^m 03.5^s	+19° 46' 24.2"	Sge
Perseus cluster	Cluster of Galaxies	2 hours and 46 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 (41876)		31 minutes and 40 seconds	in 3 days	n/a	n/a	n/a	n/a	05^h 21^m 36.0^s	+33° 17' 60.0"	n/a
GRB 221009A	Gamma-ray Burst	3 hours and 20 minutes	in 3 days	ACIS-S	n/a	None	Time Critical, Monitoring	19^h 13^m 03.5^s	+19° 46' 24.2"	Sge
CAL-ER (41875)			in 3 days	n/a	n/a	n/a	n/a	23^h 36^m 05.1^s	+22° 25' 58.8"	n/a
IRAS04416+1215	Seyfert 1 Galaxy	3 hours and 20 minutes	in 3 days	ACIS-S	n/a	None	Time Critical, Monitoring	04^h 44^m 28.8^s	+12° 21' 11.7"	Ori
6dFGS gJ031612.2-380111	Galaxy	11 hours and 16 minutes	in 3 days	ACIS-S	n/a	None	n/a	03^h 16^m 12.2^s	-38° 01' 10.9"	For
CAL-ER (41874)		50 minutes	in 4 days	n/a	n/a	n/a	n/a	05^h 30^m 24.0^s	+20° 53' 60.0"	n/a
CAL-ER (41873)		50 minutes	in 4 days	n/a	n/a	n/a	n/a	21^h 04^m 20.5^s	-49° 13' 29.6"	n/a
CAL-ER (41872)		15 minutes	in 4 days	n/a	n/a	n/a	n/a	05^h 30^m 24.0^s	+20° 53' 60.0"	n/a
CAL-ER (41871)		15 minutes	in 4 days	n/a	n/a	n/a	n/a	05^h 36^m 24.0^s	+27° 41' 60.0"	n/a
CAL-ER (41870)		50 minutes	in 4 days	n/a	n/a	n/a	n/a	17^h 50^m 48.0^s	+40° 36' 00.0"	n/a
CAL-ER (41869)		50 minutes	in 4 days	n/a	n/a	n/a	n/a	14^h 14^m 51.3^s	-18° 35' 48.8"	n/a