ASTROSAT CZTI

Data Quality Report

Orbit 57135

Creation date: 2026-04-20T13:06:32.858602
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_083T10_9000006566_57135cztM0_level2.fits modeM0/AS1A14_083T10_9000006566_57135cztM0_level2_quad_clean.evt
Size (bytes)817,243,20090,720,000
Size779.4 MB 86.5 MB
Events in quadrant A4,136,285678,385
Events in quadrant B4,886,737693,960
Events in quadrant C7,613,917459,770
Events in quadrant D13,040,431399,684

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0178442
B0198955
C0279292
D0439162

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74053725.023633%
B740479910.791464%
C7404244633.036197%
D7404300040.518639%

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 7750 7405 204 204 2.63% 2.75%
B 7749 7404 375 375 4.84% 5.06%
C 7749 7406 2018 2018 26.04% 27.25%
D 7749 7404 3123 3123 40.30% 42.18%

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 951899 4799.7 809 787 198.2
A 5 113 33888 167.04 809 787 198.2
A 3 137 9958 46.28 809 787 198.2
B 10 16 1631873 9898.41 770 741 164.8
B 8 234 30664 181.58 770 741 164.8
B 5 172 28158 166.38 770 741 164.8
C 15 198 5000511 29774.4 622 616 167.9
C 12 252 132829 787.33 622 616 167.9
C 14 254 36144 211.57 622 616 167.9
D 15 142 9792476 52410.73 663 634 186.8
D 2 249 167920 895.4 663 634 186.8
D 8 240 114957 611.91 663 634 186.8

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