Page created: Saturday, 04 Jul 2026 16:58:17 UTC

The target - PG 1553+113 - is being observed by ACIS-I for 8 hours and 28 minutes. The observation started 5 hours ago and ends in 4 hours, and is part of the proposal Identifying the Hosts of Hot Gas Absorption. The target - also called QSO B1553+113 - is located in the constellation Serpens and is a BL Lac. More information on the target can be found at SIMBAD. See related observations: PG 1553+113 (29897, 30718, 30719, 30435, 32344, 30437); Ton S180 (29898).

View:
The instrument field-of-view on top of the DSS image of the source.The instrument field-of-view on top of the PSPC image of the source.The instrument field-of-view on top of the RASS image of the source.
Target: PG 1553+113
SIMBAD Type: BL Lac
Observation Details: 30436
Sequence Summary: 901871
Proposal Id: 26900274
Proposal: Cycle 26, General Observer, EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Instrument: ACIS-I
Chips: ACIS-012367
Data Mode: FAINT
Date: 12:02 Saturday, 4 July 2026 (UTC)
Exposure (approved): 8 hours and 28 minutes
Right Ascension: 15h 55m 43.0s
Declination: +11° 11' 24.4"
Roll: 232°
Constellation: Serpens

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