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O B S E R V A T I O N   C A T A L O G

OBSID:
30636
 Title:
PHANGS-Chandra: A Legacy Survey for Detailing the First Billion Years of X-ray Evolution in Galaxies
Investigator:
Lehmer
 Observer:
Lehmer, Bret
 Phone:
479-575-5928
 Email:
lehmer@uark.edu
Target Name:
NGC4303
 Sequence Number:
601619
 Instrument:
ACIS-S
 Grating:
NONE
 SI Mode:
TE_0046EB
 Raster Scan:
N
 Annotated DOT:
NOV2324b

Proposal Number:
25620364
 Right Ascension:
185.478
 Declination:
4.4738
 Status:
observed
 Start Date:
2024-12-01 07:41:57
Category:
NORMAL GALAXIES
 Type:
GO
 AO Cycle:
25
 Dither Flag:
Y
 Y Offset:
-1.5
 Z Offset:
0
Est. Count Rate:
0.091177
 Order-1 Count Rate:

 Exposure Time:
14
 Time Remaining:
14.027
 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:
Theoretical models predict HMXBs undergo population changes as host stars age, due to the variety of formation timescales for different object classes (supergiant, Be, and wind-fed HMXBs). However, it has not been possible to constrain this evolution due to a lack of age-discriminating measurements of host stellar populations in galaxies. To alleviate this limitation, we will obtain Chandra coverage for 19 galaxies in the PHANGS-JWST sample. The sample will soon have exquisite JWST imaging spanning 2-21um supplementing existing ALMA, VLT/MUSE, and Hubble data; thus allowing for high-precision stellar age and metallicity constraints at 5-50 pc scales. We will uniquely constrain the age evolution of the HMXB luminosity function on meaningful timescales while controlling for metallicity.

psci Run:
74
 Processing Date:
Dec 10 20:28
 psci Directory:
/nfs/maaxnew/r3/fo/acis129a/acis129.log
OBSID:
30636
 SIM Mode:
ACIS-S
 OTG Mode:
NONE
 Seq Number:
601619
 Target Name:
NGC4303
 AO:
25
Start VCDU:
16662:032
 Start Time (UTC):
336:29535.596
 Stop Time (UTC):
336:43572.788
 Kilosecs:
14.0
 % Frames:
100.0
 # CCDs:
I5
# Frames:
4469
 # Events:
303194
 Events/sec:
21
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-113.0
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:
74

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