ASTROSAT CZTI

Data Quality Report

Orbit 20210219_A10_048T07_9000004188_level2

Creation date: 2025-12-20T16:18:17.596931
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/AS1A10_048T07_9000004188cztM0_level2.fits modeM0/AS1A10_048T07_9000004188cztM0_level2_quad_clean.evt
Size (bytes)737,925,120590,849,280
Size703.7 MB 563.5 MB
Events in quadrant A4,637,2963,399,174
Events in quadrant B4,427,0083,440,940
Events in quadrant C4,411,2743,151,307
Events in quadrant D3,906,6042,937,200

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01050
B01050
C01050
D01050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014740
B014740
C014740
D014740

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01549770
B01599270
C02380850
D02176880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A723759431.302936%
B7237514001.934370%
C7237552217.213817%
D7237443085.952414%

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 82975 72374 0 0 0.00% 0.00%
B 82975 72374 0 0 0.00% 0.00%
C 82975 72374 0 0 0.00% 0.00%
D 82975 72212 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 4406 11.09 1208 1134 295.1
A 7 110 3735 8.81 1208 1134 295.1
A 0 30 3442 7.82 1208 1134 295.1
B 2 9 3549 10.66 1170 1116 228.2
B 2 8 3058 8.51 1170 1116 228.2
B 3 80 2887 7.76 1170 1116 228.2
C 1 80 3403 7.85 1165 1092 294.3
C 1 81 3326 7.59 1165 1092 294.3
C 12 241 3023 6.56 1165 1092 294.3
D 15 46 2896 6.42 1114 1020 292.4
D 10 189 2751 5.92 1114 1020 292.4
D 7 3 2691 5.71 1114 1020 292.4

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