ASTROSAT CZTI

Data Quality Report

Orbit 20220227_A11_069T01_9000004972_level2

Creation date: 2026-01-02T12:02:16.127514
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/AS1A11_069T01_9000004972cztM0_level2.fits modeM0/AS1A11_069T01_9000004972cztM0_level2_quad_clean.evt
Size (bytes)147,260,160158,624,640
Size140.4 MB 151.3 MB
Events in quadrant A857,114933,555
Events in quadrant B849,860974,201
Events in quadrant C875,906934,367
Events in quadrant D751,066836,494

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0520
C0520
D0530

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03340
B03340
C03340
D03340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0533700
B0384020
C0342480
D0530470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A16304169910.420756%
B163045573.416340%
C163041230.754416%
D163044192.569921%

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 25772 16303 0 0 0.00% 0.00%
B 25772 16303 0 0 0.00% 0.00%
C 25772 16302 0 0 0.00% 0.00%
D 25772 16298 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 9 19 732 9.16 223 209 57.1
A 0 29 732 9.16 223 209 57.1
A 7 110 708 8.74 223 209 57.1
B 2 9 700 10.29 225 214 47.2
B 3 80 628 8.77 225 214 47.2
B 3 17 619 8.58 225 214 47.2
C 1 80 745 8.77 231 216 60.3
C 1 81 724 8.42 231 216 60.3
C 9 188 599 6.35 231 216 60.3
D 10 189 622 7.22 214 196 59.0
D 7 3 561 6.18 214 196 59.0
D 6 231 544 5.89 214 196 59.0

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