ASTROSAT CZTI

Data Quality Report

Orbit 20171029_A04_080T03_9000001650_level2

Creation date: 2025-11-18T02:00:59.563074
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/AS1A04_080T03_9000001650cztM0_level2.fits modeM0/AS1A04_080T03_9000001650cztM0_level2_quad_clean.evt
Size (bytes)51,183,36045,918,720
Size48.8 MB 43.8 MB
Events in quadrant A257,444205,640
Events in quadrant B296,540261,519
Events in quadrant C314,578266,143
Events in quadrant D264,930240,636

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0284880
B0162900
C0122580
D0161140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5951202834.078306%
B59515048.469165%
C5951961.613174%
D59512604.369014%

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 5966 5933 0 0 0.00% 0.00%
B 5966 5950 0 0 0.00% 0.00%
C 5966 5951 0 0 0.00% 0.00%
D 5966 5949 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 29 239 9.26 66 62 19.1
A 14 188 227 8.63 66 62 19.1
A 7 110 212 7.85 66 62 19.1
B 2 9 248 9.55 78 74 18.2
B 14 254 224 8.23 78 74 18.2
B 3 17 215 7.74 78 74 18.2
C 1 80 243 7.07 83 77 23.5
C 1 81 232 6.6 83 77 23.5
C 2 191 226 6.34 83 77 23.5
D 3 31 217 6.63 75 68 22.5
D 7 5 201 5.92 75 68 22.5
D 3 14 201 5.92 75 68 22.5

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