ASTROSAT CZTI

Data Quality Report

Orbit 58166

Creation date: 2026-06-30T14:16:09.222197
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/AS1A14_042T02_9000006586_58166cztM0_level2.fits modeM0/AS1A14_042T02_9000006586_58166cztM0_level2_quad_clean.evt
Size (bytes)688,616,64079,686,720
Size656.7 MB 76.0 MB
Events in quadrant A3,084,430615,993
Events in quadrant B10,943,032348,669
Events in quadrant C2,982,381587,226
Events in quadrant D7,993,376423,163

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0136141
B0368871
C0135101
D0281011

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A62751342.135458%
B6276328452.326322%
C6275761.211155%
D6275180428.749004%

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 7080 6275 10 10 0.14% 0.16%
B 7081 6276 2792 2792 39.43% 44.49%
C 7080 6275 12 12 0.17% 0.19%
D 7079 6274 1825 1825 25.78% 29.09%

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 3 14 136882 772.1 713 694 176.4
A 12 3 51311 286.97 713 694 176.4
A 3 245 41244 229.89 713 694 176.4
B 10 128 7156093 63251.38 522 502 113.1
B 2 249 912376 8060.45 522 502 113.1
B 5 185 128231 1129.05 522 502 113.1
C 12 252 81149 428.28 686 680 187.9
C 14 96 52798 277.39 686 680 187.9
C 14 254 44141 231.31 686 680 187.9
D 12 110 3054324 17250.76 618 591 177.0
D 8 160 1087443 6139.7 618 591 177.0
D 8 240 922343 5207.04 618 591 177.0

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