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 20 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.

TargetObject typeExposure timeStartInstrumentJoint withTurnaroundConstraintsRight AscensionDeclinationConstellation
B2.4 0553+23Radio Source4 hours and 25 minutes3 days agoACIS-Sn/aNonen/a05h 56m 57.6s+23° 55' 08.0"Tau
GW170817Gravitational Wave Event5 hours and 13 minutes3 days agoACIS-SNRAONoneTime Critical13h 09m 48.1s-23° 22' 53.3"Hya
IRAS04416+1215Seyfert 1 Galaxy4 hours and 10 minutes3 days agoACIS-Sn/aNoneTime Critical, Monitoring04h 44m 28.8s+12° 21' 11.7"Ori
SDSS J160318.74+180904.9Quasar3 hours and 24 minutes3 days agoACIS-SNRAONonen/a16h 03m 18.7s+18° 09' 05.0"Her
IRAS04416+1215Seyfert 1 Galaxy3 hours and 17 minutes2 days agoACIS-Sn/aNoneTime Critical, Monitoring04h 44m 28.8s+12° 21' 11.7"Ori
ACT-CL J0223.9-3921Cluster of Galaxies5 hours and 32 minutes2 days agoACIS-Sn/aNonen/a02h 24m 00.8s-39° 21' 44.3"For
CAL-ER (41865)50 minutes2 days agon/an/an/an/a05h 30m 24.0s+20° 53' 60.0"n/a
CAL-ER (41860)15 minutes2 days agon/an/an/an/a19h 16m 47.1s+19° 01' 40.1"n/a
Perseus clusterCluster of Galaxies3 hours and 36 minutes2 days agoACIS-In/aNoneTime Critical03h 19m 48.2s+41° 30' 42.2"Per
IIZw171Unidentified2 hours and 46 minutes1 day agoACIS-Sn/aNonen/a22h 11m 53.9s+18° 41' 49.9"Peg
Perseus clusterCluster of Galaxies3 hours and 3 minutes1 day agoACIS-In/aNoneTime Critical03h 19m 48.2s+41° 30' 42.2"Per
PG2304+042Seyfert 1 Galaxy2 hours and 46 minutes1 day agoACIS-Sn/aNonen/a23h 07m 02.9s+04° 32' 57.0"Psc
Perseus clusterCluster of Galaxies3 hours and 3 minutes22 hours agoACIS-In/aNoneTime Critical03h 19m 48.2s+41° 30' 42.2"Per
SDSSJ233504.22-084506.4Unidentified2 hours and 56 minutes19 hours agoACIS-Sn/aNonen/a23h 35m 04.2s-08° 45' 06.4"Aqr
Perseus clusterCluster of Galaxies3 hours and 3 minutes16 hours agoACIS-In/aNoneTime Critical03h 19m 48.2s+41° 30' 42.2"Per
Center of COSMOS-WebUnidentified3 hours and 53 minutes12 hours agoACIS-In/aNonen/a09h 59m 50.8s+02° 26' 01.6"Sex
SN 1986JSuperNova4 hours and 10 minutes7 hours agoACIS-Sn/aNoneTime Critical, Monitoring02h 22m 31.3s+42° 19' 56.4"And
CAL-ER (41859)15 minutes2 hours agon/an/an/an/a06h 30m 38.7s+32° 08' 55.0"n/a
SDSS J142846.71+172353.1Unidentified2 hours and 46 minutesnowACIS-Sn/aNonen/a14h 28m 46.7s+17° 23' 53.2"Boo
2MASX J07040344+3830246Galaxy2 hours and 46 minutesin 2 hoursACIS-Sn/aNonen/a07h 04m 03.5s+38° 30' 24.8"Aur
CAL-ER (41858)15 minutesin 6 hoursn/an/an/an/a18h 03m 36.1s+25° 45' 35.6"n/a
TV CassiopeiaSpectroscopic Binary3 hours and 3 minutesin 6 hoursACIS-S with High Energy Transmission Grating (HETG)n/aNonen/a00h 19m 18.8s+59° 08' 20.5"Cas
AT2025aarmUnidentified4 hours and 10 minutesin 10 hoursACIS-Sn/aImmediateTime Critical04h 32m 12.4s-05° 22' 39.6"Eri
CAL-ER (41857)50 minutesin 15 hoursn/an/an/an/a06h 03m 36.0s+11° 54' 00.0"n/a
CAL-ER (41856)50 minutesin 16 hoursn/an/an/an/a06h 03m 36.0s+11° 54' 00.0"n/a
CAL-ER (41855)50 minutesin 17 hoursn/an/an/an/a07h 02m 24.0s+14° 11' 60.0"n/a
CAL-ER (41854)50 minutesin 21 hoursn/an/an/an/a14h 13m 59.8s-37° 29' 23.3"n/a
IC 443SuperNova Remnant2 hours and 55 minutesin 1 dayACIS-Sn/aNonen/a06h 17m 05.0s+22° 21' 27.0"Gem
NGC5728Seyfert 2 Galaxy4 hours and 10 minutesin 1 dayACIS-Sn/aNonen/a14h 42m 23.9s-17° 15' 11.2"Lib
IC 443SuperNova Remnant2 hours and 55 minutesin 1 dayACIS-Sn/aNonen/a06h 17m 05.0s+22° 21' 27.0"Gem
NGC5728Seyfert 2 Galaxy4 hours and 10 minutesin 2 daysACIS-Sn/aNonen/a14h 42m 23.9s-17° 15' 11.2"Lib
IC 443SuperNova Remnant2 hours and 55 minutesin 2 daysACIS-Sn/aNonen/a06h 17m 05.0s+22° 21' 27.0"Gem
NGC5728Seyfert 2 Galaxy4 hours and 26 minutesin 2 daysACIS-Sn/aNonen/a14h 42m 23.9s-17° 15' 11.2"Lib
CIZA J0635.0+2231Cluster of Galaxies2 hours and 46 minutesin 2 daysACIS-In/aNonen/a06h 35m 03.9s+22° 31' 34.0"Gem
NGC4536HII Galaxy9 hours and 26 minutesin 2 daysACIS-Sn/aNonen/a12h 34m 27.1s+02° 11' 16.4"Vir
MKN421BL Lac - type object15 hoursin 3 daysACIS-S with Low Energy Transmission Grating (LETG)n/aNoneTime Critical, Monitoring11h 04m 27.2s+38° 12' 31.7"UMa
CAL-ER (41853)50 minutesin 3 daysn/an/an/an/a06h 44m 14.9s+27° 03' 23.4"n/a
CAL-ER (41852)50 minutesin 3 daysn/an/an/an/a14h 35m 36.0s-12° 54' 00.0"n/a
CAL-ER (41851)33 minutes and 20 secondsin 4 daysn/an/an/an/a07h 22m 24.0s-07° 12' 00.0"n/a
CAL-ER (41850)50 minutesin 4 daysn/an/an/an/a06h 32m 23.6s+18° 30' 05.0"n/a
CAL-ER (41849)50 minutesin 4 daysn/an/an/an/a15h 07m 58.8s-60° 06' 49.3"n/a