ASTROSAT CZTI

Data Quality Report

Orbit 20190401_A05_166T04_9000002826_level2

Creation date: 2025-11-29T00:57:57.836604
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/AS1A05_166T04_9000002826cztM0_level2.fits modeM0/AS1A05_166T04_9000002826cztM0_level2_quad_clean.evt
Size (bytes)584,455,680417,058,560
Size557.4 MB 397.7 MB
Events in quadrant A3,654,5062,252,815
Events in quadrant B3,425,1142,241,837
Events in quadrant C3,568,2362,174,447
Events in quadrant D2,997,1021,907,274

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012040
B012040
C012040
D012040

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0920
B0920
C0920
D0920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01229770
B01502060
C01276160
D02049170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A590659001.523745%
B5906531495.331415%
C5906512872.178955%
D5906457739.774143%

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 68310 59065 0 0 0.00% 0.00%
B 68310 59029 0 0 0.00% 0.00%
C 68310 59065 0 0 0.00% 0.00%
D 68310 59034 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 3396 10.7 950 889 234.2
A 7 110 2901 8.59 950 889 234.2
A 15 236 2666 7.59 950 889 234.2
B 2 9 2690 10.17 905 861 179.9
B 2 8 2361 8.34 905 861 179.9
B 3 17 2305 8.03 905 861 179.9
C 1 81 2713 7.53 942 880 243.4
C 1 80 2691 7.44 942 880 243.4
C 3 126 2500 6.65 942 880 243.4
D 10 190 2341 6.9 856 780 226.2
D 7 3 2142 6.02 856 780 226.2
D 3 14 2112 5.89 856 780 226.2

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