C H A N D R A   S C I E N C E   C E N T E R
O B S E R V A T I O N   C A T A L O G

OBSID:
22517
 Title:
DID HMXBS REIONIZE THE UNIVERSE?        
Investigator:
Berg
 Observer:
Berg, Danielle
 Phone:
3202674014
 Email:
berg.249@osu.edu
Target Name:
J092055
 Sequence Number:
601494
 Instrument:
ACIS-S
 Grating:
NONE
 SI Mode:
TE_00958B
 Raster Scan:
N
 Annotated DOT:
JAN1821a

Proposal Number:
21620471
 Right Ascension:
140.229
 Declination:
52.5686
 Status:
archived
 Start Date:
2021-01-23 13:24:07
Category:
NORMAL GALAXIES
 Type:
GO
 AO Cycle:
21
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.000809
 Order-1 Count Rate:

 Exposure Time:
21
 Time Remaining:
21.064
 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:
F
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:
We propose 87 ks of Chandra ACIS-S observations to characterize the X-ray emission from four nearby extreme high-ionization UV emission-line galaxies. These extreme UV galaxies are good analogs to high redshift (z>7) reionization-era sources and will allow us to investigate the hard radiation fields and physical conditions which power cosmic reionization. Our sample represents a pilot survey containing the most extreme high-ionization UV emission lines (e.g., CIV and HeII) measurements for star-forming galaxies at z~0. These observations will allow us to link X-ray sources for the first time to observations of extreme UV emission sources leaking high-energy photons, and constrain the contribution of high mass X-ray binaries to the ionizing photon budget that reionized the Universe.

psci Run:
111
 Processing Date:
Feb 4 2021
 psci Directory:
/nfs/maaxnew/r3/eZ/acis114c/acis114.log
OBSID:
22517
 SIM Mode:
ACIS-S
 OTG Mode:
NONE
 Seq Number:
601494
 Target Name:
J092055
 AO:
21
Start VCDU:
115461:120
 Start Time (UTC):
023:49109.266
 Stop Time (UTC):
023:70185.671
 Kilosecs:
21.1
 % Frames:
100.0
 # CCDs:
S4
# Frames:
6710
 # Events:
864900
 Events/sec:
41
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-116.8
Parameter Block:
0x00958024
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te3x3
 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:
111

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