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O B S E R V A T I O N   C A T A L O G

OBSID:
27041
 Title:
ZAMS X-rays and Primordial Planetary Atmospheres      
Investigator:
Getman
 Observer:
Getman, Konstantin
 Phone:
814-4415876
 Email:
kug1@psu.edu
Target Name:
NGC 6242
 Sequence Number:
201561
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_006E6B
 Raster Scan:
N
 Annotated DOT:
MAR0624a

Proposal Number:
24200285
 Right Ascension:
253.878
 Declination:
-39.474
 Status:
archived
 Start Date:
2024-03-10 20:01:12
Category:
STARS AND WD
 Type:
GO
 AO Cycle:
24
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.05
 Order-1 Count Rate:

 Exposure Time:
10
 Time Remaining:
10.093
 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
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:
X-ray emission from young stars has a significant impact on the loss of early planetary atmospheres and conditions promoting habitability. Tracking the temporal decline of X-ray radiation during the first ~100 Myr needs to consider both quasi-continuous and powerful flare emission with dependencies on stellar age and mass. We propose a Chandra Large Project GO/GTO study, complemented by Gaia DR3 data, for four [40-70] Myr old open clusters to obtain X-ray properties of 1500-2000 stars. Together with existing studies of [0.5-25] Myr old star clusters, we will derive mass-stratified X-ray luminosity distributions, including both X-ray detections and nondetections, to allow improved calculations of planetary atmospheric survival, chemistry and habitability.

psci Run:
538
 Processing Date:
Jul 18 2024
 psci Directory:
/nfs/maaxnew/r3/fl/acis126e/acis126.log
OBSID:
27041
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
201561
 Target Name:
NGC_6242
 AO:
24
Start VCDU:
103742:112
 Start Time (UTC):
070:73062.401
 Stop Time (UTC):
070:83167.038
 Kilosecs:
10.1
 % Frames:
100.0
 # CCDs:
I4
# Frames:
3217
 # Events:
136630
 Events/sec:
13
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-115.2
Parameter Block:
0x006e6034
 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:
538

pgf@space.mit.edu Mon Mar 31 10:36:39 EST 2025