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 and 2 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
B2.1 0719+32C	Radio Source	4 hours and 25 minutes	4 days ago	ACIS-S	n/a	None	n/a	07^h 23^m 09.5^s	+32° 38' 52.9"	Gem
Cyg X-2	Low Mass X-ray Binary	3 hours and 52 minutes	3 days ago	HRC-I with High Energy Transmission Grating (HETG)	n/a	None	n/a	21^h 44^m 41.2^s	+38° 19' 17.1"	Cyg
MKN421	BL Lac - type object	4 hours and 2 minutes	3 days ago	ACIS-S with Low Energy Transmission Grating (LETG)	n/a	None	Time Critical, Monitoring	11^h 04^m 27.2^s	+38° 12' 31.7"	UMa
NGC 5506	Seyfert 2 Galaxy	1 hour and 18 minutes	3 days ago	ACIS-S with High Energy Transmission Grating (HETG)	n/a	None	n/a	14^h 13^m 14.9^s	-03° 12' 27.5"	Vir
NGC2775	Active Galaxy Nucleus Candidate	3 hours and 2 minutes	3 days ago	ACIS-S	n/a	None	n/a	09^h 10^m 20.1^s	+07° 02' 16.8"	Cnc
3C273	BL Lac - type object	8 hours and 20 minutes	3 days ago	ACIS-S with High Energy Transmission Grating (HETG)	n/a	None	Time Critical	12^h 29^m 06.7^s	+02° 03' 08.6"	Vir
SDSS J081800.19+191810.0	Active Galaxy Nucleus	2 hours and 45 minutes	2 days ago	ACIS-S	n/a	None	n/a	08^h 18^m 00.2^s	+19° 18' 10.1"	Cnc
SDSSJ161649.37-004250.4	Seyfert 1 Galaxy	2 hours and 45 minutes	2 days ago	ACIS-S	n/a	None	n/a	16^h 16^m 49.4^s	-00° 42' 50.4"	Ser
SDSS J081800.19+191810.0	Active Galaxy Nucleus	2 hours and 45 minutes	2 days ago	ACIS-S	n/a	None	n/a	08^h 18^m 00.2^s	+19° 18' 10.1"	Cnc
CAL-ER (41793)		50 minutes	2 days ago	n/a	n/a	n/a	n/a	07^h 42^m 59.5^s	+18° 06' 29.8"	n/a
CAL-ER (41788)		15 minutes and 40 seconds	1 day ago	n/a	n/a	n/a	n/a	17^h 03^m 30.6^s	+06° 38' 26.2"	n/a
A1795	Cluster of Galaxies	5 hours and 30 minutes	1 day ago	ACIS-I	n/a	None	Time Critical	13^h 48^m 52.7^s	+26° 35' 27.0"	Boo
NGC2775	Active Galaxy Nucleus Candidate	2 hours and 46 minutes	1 day ago	ACIS-S	n/a	None	n/a	09^h 10^m 20.1^s	+07° 02' 16.8"	Cnc
NGC5728	Seyfert 2 Galaxy	2 hours and 46 minutes	23 hours ago	ACIS-S	n/a	None	n/a	14^h 42^m 23.9^s	-17° 15' 11.2"	Lib
Abell 2255	Cluster of Galaxies	10 hours and 16 minutes	20 hours ago	ACIS-I	n/a	None	n/a	17^h 12^m 50.0^s	+64° 03' 10.6"	Dra
CAL-ER (41787)			9 hours ago	n/a	n/a	n/a	n/a	11^h 19^m 52.7^s	+30° 50' 00.2"	n/a
NGC2775	Active Galaxy Nucleus Candidate	2 hours and 46 minutes	8 hours ago	ACIS-S	n/a	None	n/a	09^h 10^m 20.1^s	+07° 02' 16.8"	Cnc
Vela X-1	High Mass X-ray Binary	4 hours and 10 minutes	5 hours ago	ACIS-S with High Energy Transmission Grating (HETG)	n/a	None	Time Critical, Constrained	09^h 02^m 06.9^s	-40° 33' 16.9"	Vel
SDSSJ080755.62+055638.1	Quasar	2 hours and 46 minutes	now	ACIS-S	n/a	None	n/a	08^h 07^m 55.6^s	+05° 56' 38.2"	CMi
GAMA2258819	Active Galaxy Nucleus	5 hours	in 3 hours	ACIS-S	JWST	None	n/a	02^h 03^m 29.8^s	-09° 29' 29.3"	Cet
SDSSJ081010.69+073337.2	Unidentified	2 hours and 46 minutes	in 9 hours	ACIS-S	n/a	None	n/a	08^h 10^m 10.7^s	+07° 33' 37.2"	Cnc
CAL-ER (41786)			in 12 hours	n/a	n/a	n/a	n/a	11^h 19^m 24.2^s	-13° 49' 31.8"	n/a
NGC 5506	Seyfert 2 Galaxy	5 hours and 33 minutes	in 13 hours	ACIS-S with High Energy Transmission Grating (HETG)	n/a	None	n/a	14^h 13^m 14.9^s	-03° 12' 27.5"	Vir
CAL-ER (41785)		50 minutes	in 19 hours	n/a	n/a	n/a	n/a	08^h 14^m 07.8^s	+20° 58' 57.4"	n/a
CAL-ER (41784)		50 minutes	in 20 hours	n/a	n/a	n/a	n/a	07^h 44^m 11.9^s	+22° 22' 07.7"	n/a
CAL-ER (41783)		50 minutes	in 22 hours	n/a	n/a	n/a	n/a	22^h 52^m 05.6^s	+03° 30' 54.7"	n/a
CAL-ER (41782)		50 minutes	in 1 day	n/a	n/a	n/a	n/a	02^h 21^m 36.0^s	+41° 47' 60.0"	n/a
CAL-ER (41781)		15 minutes	in 1 day	n/a	n/a	n/a	n/a	07^h 44^m 11.9^s	+22° 22' 07.3"	n/a
CAL-ER (41780)		15 minutes	in 1 day	n/a	n/a	n/a	n/a	22^h 52^m 05.6^s	+03° 30' 54.7"	n/a
CAL-ER (41779)		15 minutes	in 1 day	n/a	n/a	n/a	n/a	17^h 03^m 30.5^s	+06° 36' 43.2"	n/a
MKN421	BL Lac - type object	4 hours and 10 minutes	in 1 day	ACIS-S with Low Energy Transmission Grating (LETG)	n/a	None	Time Critical, Monitoring	11^h 04^m 27.2^s	+38° 12' 31.7"	UMa
NGC5728	Seyfert 2 Galaxy	2 hours and 36 minutes	in 1 day	ACIS-S	n/a	None	n/a	14^h 42^m 23.9^s	-17° 15' 11.2"	Lib
Abell 795	Cluster of Galaxies	2 hours and 46 minutes	in 2 days	ACIS-S	n/a	None	n/a	09^h 24^m 05.3^s	+14° 10' 21.5"	Leo
NGC5728	Seyfert 2 Galaxy	3 hours and 11 minutes	in 2 days	ACIS-S	n/a	None	n/a	14^h 42^m 23.9^s	-17° 15' 11.2"	Lib
NGC4694	Active Galaxy Nucleus	8 hours and 20 minutes	in 2 days	ACIS-S	n/a	None	n/a	12^h 48^m 15.1^s	+10° 59' 00.6"	Vir
Abell 795	Cluster of Galaxies	2 hours and 46 minutes	in 2 days	ACIS-S	n/a	None	n/a	09^h 24^m 05.3^s	+14° 10' 21.5"	Leo
SN2025sei	Unidentified	3 hours and 3 minutes	in 2 days	ACIS-S	n/a	Intermediate	Time Critical, Monitoring	17^h 48^m 59.4^s	+25° 29' 44.9"	Her
Abell 795	Cluster of Galaxies	2 hours and 46 minutes	in 3 days	ACIS-S	n/a	None	n/a	09^h 24^m 05.3^s	+14° 10' 21.5"	Leo
CAL-ER (41778)		15 minutes	in 3 days	n/a	n/a	n/a	n/a	06^h 56^m 17.8^s	+18° 54' 44.3"	n/a
BOSS0210W	Unidentified	8 hours and 20 minutes	in 3 days	ACIS-I	n/a	None	n/a	02^h 10^m 60.0^s	+00° 46' 48.0"	Cet
GRB260114A	Unidentified	6 hours and 56 minutes	in 3 days	ACIS-S	NRAO,JWST	Intermediate	Time Critical, Monitoring	04^h 58^m 23.5^s	-08° 00' 51.9"	Eri
CAL-ER (41777)		50 minutes	in 3 days	n/a	n/a	n/a	n/a	06^h 55^m 12.0^s	+08° 24' 00.0"	n/a