ASTROSAT CZTI

Data Quality Report

Orbit 54502

Creation date: 2025-10-25T09:03:00.144619
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_127T09_9000006520_54502cztM0_level2.fits modeM0/AS1A14_127T09_9000006520_54502cztM0_level2_quad_clean.evt
Size (bytes)782,444,160171,803,520
Size746.2 MB 163.8 MB
Events in quadrant A6,325,8491,135,251
Events in quadrant B6,311,6411,225,836
Events in quadrant C7,574,5151,073,977
Events in quadrant D7,847,740960,820

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270603
B0271043
C0307613
D0320073

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02380
B02380
C02380
D02380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0350
B0350
C0350
D0350

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A116572652.273312%
B116563232.771105%
C116564323.706246%
D116577616.528266%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 15112 11660 186 186 1.23% 1.60%
B 15111 11659 92 92 0.61% 0.79%
C 15111 11659 301 301 1.99% 2.58%
D 15112 11660 638 638 4.22% 5.47%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 13 248 711623 2240.74 1289 1258 317.0
A 8 9 132962 415.44 1289 1258 317.0
A 4 3 111906 349.02 1289 1258 317.0
B 2 249 516001 1881.34 1281 1236 273.6
B 5 172 264046 960.51 1281 1236 273.6
B 5 185 193692 703.38 1281 1236 273.6
C 4 5 1701719 4922.92 1246 1235 345.4
C 13 3 373301 1077.13 1246 1235 345.4
C 7 64 271497 782.41 1246 1235 345.4
D 8 176 1314186 3755.05 1219 1167 349.7
D 3 12 1298183 3709.28 1219 1167 349.7
D 5 173 79976 225.38 1219 1167 349.7

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter