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 18 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 17 minutes	3 days ago	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 57 minutes	3 days ago	ACIS-S	n/a	None	n/a	17^h 34^m 54.3^s	+50° 45' 21.3"	Dra
Perseus cluster	Cluster of Galaxies	2 hours and 52 minutes	3 days ago	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 8 minutes	3 days ago	ACIS-I	n/a	None	n/a	10^h 00^m 59.1^s	+02° 02' 47.3"	Sex
Center of COSMOS-Web	Unidentified	4 hours and 10 minutes	3 days ago	ACIS-I	n/a	None	n/a	10^h 00^m 59.1^s	+02° 02' 47.3"	Sex
CAL-ER (41881)		50 minutes	3 days ago	n/a	n/a	n/a	n/a	05^h 47^m 56.3^s	+23° 01' 29.9"	n/a
CAL-ER (41877)		15 minutes and 40 seconds	2 days ago	n/a	n/a	n/a	n/a	17^h 56^m 57.1^s	+71° 55' 28.6"	n/a
ZTF J0546+3843	Cataclysmic Binary	5 hours and 26 minutes	2 days ago	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 9 minutes	2 days ago	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 47 minutes	2 days ago	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 8 minutes	1 day ago	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 47 minutes	1 day ago	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 8 minutes	1 day ago	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	21 hours ago	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	18 hours ago	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	17 hours ago	ACIS-S	n/a	None	Time Critical, Monitoring	19^h 13^m 03.5^s	+19° 46' 24.2"	Sge
CAL-ER (41875)			14 hours ago	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	13 hours ago	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	now	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 hours	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 8 hours	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 10 hours	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 11 hours	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 12 hours	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 13 hours	n/a	n/a	n/a	n/a	14^h 14^m 51.3^s	-18° 35' 48.8"	n/a
Center of COSMOS-Web	Unidentified	8 hours and 20 minutes	in 16 hours	ACIS-I	n/a	None	n/a	10^h 00^m 20.9^s	+02° 23' 17.6"	Sex
Center of COSMOS-Web	Unidentified	4 hours and 26 minutes	in 1 day	ACIS-I	n/a	None	n/a	09^h 59^m 50.8^s	+02° 26' 01.6"	Sex
NGVS J122636.42+125512.9	Low Surface Brightness Galaxy	5 hours and 33 minutes	in 1 day	ACIS-S	NRAO	None	n/a	12^h 26^m 36.4^s	+12° 55' 12.9"	Vir
B2.4 0553+23	Radio Source	4 hours and 26 minutes	in 1 day	ACIS-S	n/a	None	n/a	05^h 56^m 57.6^s	+23° 55' 08.0"	Tau
GW170817	Gravitational Wave Event	5 hours and 41 minutes	in 2 days	ACIS-S	NRAO	None	Time Critical	13^h 09^m 48.1^s	-23° 22' 53.3"	Hya
CAL-ER (41868)			in 2 days	n/a	n/a	n/a	n/a	08^h 20^m 03.1^s	-46° 17' 10.3"	n/a
IRAS04416+1215	Seyfert 1 Galaxy	4 hours and 10 minutes	in 2 days	ACIS-S	n/a	None	Time Critical, Monitoring	04^h 44^m 28.8^s	+12° 21' 11.7"	Ori
CAL-ER (41867)		15 minutes	in 2 days	n/a	n/a	n/a	n/a	06^h 31^m 39.9^s	+35° 57' 29.2"	n/a
SDSS J160318.74+180904.9	Quasar	3 hours and 36 minutes	in 2 days	ACIS-S	NRAO	None	n/a	16^h 03^m 18.7^s	+18° 09' 05.0"	Her
CAL-ER (41866)		15 minutes	in 2 days	n/a	n/a	n/a	n/a	21^h 38^m 06.3^s	-40° 29' 29.4"	n/a
IRAS04416+1215	Seyfert 1 Galaxy	3 hours and 36 minutes	in 2 days	ACIS-S	n/a	None	Time Critical, Monitoring	04^h 44^m 28.8^s	+12° 21' 11.7"	Ori
ACT-CL J0223.9-3921	Cluster of Galaxies	5 hours and 50 minutes	in 3 days	ACIS-S	n/a	None	n/a	02^h 24^m 00.8^s	-39° 21' 44.3"	For
CAL-ER (41865)		50 minutes	in 3 days	n/a	n/a	n/a	n/a	05^h 30^m 24.0^s	+20° 53' 60.0"	n/a
CAL-ER (41864)		50 minutes	in 3 days	n/a	n/a	n/a	n/a	05^h 37^m 09.0^s	+27° 26' 29.4"	n/a
CAL-ER (41863)		50 minutes	in 3 days	n/a	n/a	n/a	n/a	19^h 16^m 47.1^s	+19° 01' 40.1"	n/a
CAL-ER (41862)		50 minutes	in 3 days	n/a	n/a	n/a	n/a	00^h 26^m 24.0^s	+59° 47' 60.0"	n/a
CAL-ER (41861)		15 minutes	in 3 days	n/a	n/a	n/a	n/a	05^h 37^m 09.0^s	+27° 26' 29.4"	n/a
CAL-ER (41860)		15 minutes	in 3 days	n/a	n/a	n/a	n/a	19^h 16^m 47.1^s	+19° 01' 40.1"	n/a
Perseus cluster	Cluster of Galaxies	3 hours and 36 minutes	in 3 days	ACIS-I	n/a	None	Time Critical	03^h 19^m 48.2^s	+41° 30' 42.2"	Per
IIZw171	Unidentified	2 hours and 46 minutes	in 3 days	ACIS-S	n/a	None	n/a	22^h 11^m 53.9^s	+18° 41' 49.9"	Peg