ASTROSAT CZTI

Data Quality Report

Orbit 20180510_G08_068T01_9000002090_level2

Creation date: 2025-11-22T07:50:51.747024
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/AS1G08_068T01_9000002090cztM0_level2.fits modeM0/AS1G08_068T01_9000002090cztM0_level2_quad_clean.evt
Size (bytes)217,995,840182,975,040
Size207.9 MB 174.5 MB
Events in quadrant A1,335,9861,044,388
Events in quadrant B1,282,7581,091,400
Events in quadrant C1,295,680963,104
Events in quadrant D1,087,852842,126

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0474670
B0492370
C0486760
D0653070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04720
B04720
C04720
D04720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A232361310.563780%
B232361640.705801%
C23236920.395937%
D2323617597.570150%

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 28741 23237 0 0 0.00% 0.00%
B 28741 23237 0 0 0.00% 0.00%
C 28741 23237 0 0 0.00% 0.00%
D 28741 23089 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 14 188 1357 11.68 346 324 88.5
A 0 29 1319 11.25 346 324 88.5
A 7 110 1120 9.0 346 324 88.5
B 2 9 1092 11.04 338 321 69.9
B 14 254 880 8.0 338 321 69.9
B 3 17 856 7.66 338 321 69.9
C 1 81 1009 7.64 341 317 90.5
C 12 241 967 7.18 341 317 90.5
C 1 80 961 7.11 341 317 90.5
D 6 231 782 5.92 310 282 84.5
D 3 14 770 5.77 310 282 84.5
D 6 38 765 5.71 310 282 84.5

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