ASTROSAT CZTI

Data Quality Report

Orbit 20220201_A05_082T08_9000004900_level2

Creation date: 2025-12-31T19:00:00.110712
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_082T08_9000004900cztM0_level2.fits modeM0/AS1A05_082T08_9000004900cztM0_level2_quad_clean.evt
Size (bytes)232,773,120209,197,440
Size222.0 MB 199.5 MB
Events in quadrant A1,442,5441,229,451
Events in quadrant B1,367,1681,213,699
Events in quadrant C1,415,8901,185,370
Events in quadrant D1,173,8461,056,373

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0960
B0960
C0960
D0960

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04860
B04860
C04860
D04860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0487620
B0564120
C0565380
D0844990

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A23988350.145906%
B239885832.430382%
C239883721.550775%
D2398817207.170252%

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 33429 23988 0 0 0.00% 0.00%
B 33429 23983 0 0 0.00% 0.00%
C 33429 23982 0 0 0.00% 0.00%
D 33429 23976 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 7 110 1137 8.31 375 352 94.5
A 14 95 1135 8.29 375 352 94.5
A 0 29 1125 8.18 375 352 94.5
B 2 9 1157 11.07 362 345 73.4
B 3 80 1040 9.47 362 345 73.4
B 3 17 977 8.61 362 345 73.4
C 1 81 1200 8.74 374 352 97.0
C 1 80 1189 8.63 374 352 97.0
C 3 203 1106 7.77 374 352 97.0
D 4 160 874 6.31 335 306 90.0
D 6 38 823 5.75 335 306 90.0
D 10 113 820 5.71 335 306 90.0

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