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OBSID:
25275
 Title:
Dwarf Galaxies with Radio-Selected (and Sometimes Wandering) Massive Black Holes
Investigator:
Reines
 Observer:
Reines, Amy
 Phone:
4342496844
 Email:
amy.reines@montana.edu
Target Name:
SDSS J122011.26+302008.1
 Sequence Number:
704321
 Instrument:
ACIS-S
 Grating:
NONE
 SI Mode:
TE_0046EB
 Raster Scan:
N
 Annotated DOT:
JUL2522a

Proposal Number:
23700095
 Right Ascension:
185.047
 Declination:
30.3356
 Status:
archived
 Start Date:
2022-07-31 02:07:27
Category:
ACTIVE GALAXIES AND QUASARS
 Type:
GO
 AO Cycle:
23
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.000572
 Order-1 Count Rate:

 Exposure Time:
18
 Time Remaining:
18.057
 Reqd Start Time:

 Reqd Stop Time:
Period:

 Epoch:

 Start of Period:

 End of Period:

 PS Margin:

 PE Margin:

 Max Segments:
0

ACIS Mode:
TE
 Standard?:
No
 BEP Mode:
VF
 Dropped Chip Count:
0
 Optional Chips:
I2 I3 S1
On-Chip Summing?:
No
 Row Sum:

 Column Sum:

 Frame Time:
Subarray Mode:
NONE
 Starting Row:
0
 Row Count:
1023
 Subarray Frame Time:

Duty Cycle?:
No
 Cycle Count:
0
 Primary Exp Time:

 Secondary Exp Time:
Event Filter?:
No
 Filter Threshold:

 Filter Range:

 Bias Requested?:
No
 Bias Frequency:

 Bias After?:
No
 Spatial Window?:
No

Abstract:
Using high-resolution observations from the Very Large Array, Reines et al. (2020) discovered a set of compact radio sources in nearby dwarf galaxies with luminosities indicative of accreting massive BHs. Moreover, many of these radio sources are not in the centers of the galaxies with offsets as large as ~4'' (~2 kpc). We propose Chandra and HST observations of 8 dwarf galaxies hosting radio-selected massive BHs to 1) firmly establish the presence of massive BHs (some of which are `wandering') in these dwarf galaxies and characterize the compact X-ray emission from the BHs, 2) place some constraints on the BH masses and Eddington ratios, and 3) search for stellar counterparts of the BHs and determine spatially-resolved star formation rates in the host galaxies.

psci Run:
17
 Processing Date:
Aug 14 2022
 psci Directory:
/nfs/maaxnew/r3/fg/acis121a/acis121.log
OBSID:
25275
 SIM Mode:
ACIS-S
 OTG Mode:
NONE
 Seq Number:
704321
 Target Name:
SDSS_J122011.26
 AO:
23
Start VCDU:
682:040
 Start Time (UTC):
212:08807.515
 Stop Time (UTC):
212:26874.714
 Kilosecs:
18.1
 % Frames:
100.0
 # CCDs:
I5
# Frames:
5752
 # Events:
648550
 Events/sec:
35
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-111.6
Parameter Block:
0x0046e034
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te5x5
 BEP Mode:
F
 Start Row:
0
 # Rows:
1024
Primary Exposure:
31
 Secondary Exposure:
0
 Duty Cycle:
0
 Summing?:
No
 Bias?:
Yes
 Trickle?:
Yes
 Bias Run:
17

pgf@space.mit.edu Sat Mar 29 10:37:19 EST 2025