ASTROSAT CZTI

Data Quality Report

Orbit 20181023_C04_009T01_9000002448_level2

Creation date: 2025-11-25T08:18:49.993001
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/AS1C04_009T01_9000002448cztM0_level2.fits modeM0/AS1C04_009T01_9000002448cztM0_level2_quad_clean.evt
Size (bytes)843,851,5201,161,552,960
Size804.8 MB 1.1 GB
Events in quadrant A5,089,3927,491,337
Events in quadrant B4,890,9087,583,419
Events in quadrant C5,061,4927,334,783
Events in quadrant D4,357,9866,618,079

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01900310
B02047280
C01987920
D02114010

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018280
B018280
C018280
D018280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01510
B01510
C01510
D01510

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8980310871.210427%
B8980312821.427569%
C8980311271.254969%
D8980326722.975402%

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 104783 89804 0 0 0.00% 0.00%
B 104783 89804 0 0 0.00% 0.00%
C 104783 89803 0 0 0.00% 0.00%
D 104783 89789 0 0 0.00% 0.00%

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 0 29 4919 11.22 1324 1245 327.4
A 7 110 4025 8.49 1324 1245 327.4
A 0 30 3882 8.05 1324 1245 327.4
B 2 9 3971 10.86 1297 1243 251.3
B 2 8 3467 8.85 1297 1243 251.3
B 14 254 3295 8.16 1297 1243 251.3
C 12 241 3714 7.15 1338 1255 344.2
C 3 126 3396 6.22 1338 1255 344.2
C 7 111 3342 6.06 1338 1255 344.2
D 6 231 3170 6.08 1245 1134 335.0
D 10 189 3136 5.98 1245 1134 335.0
D 3 14 3127 5.95 1245 1134 335.0

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