ASTROSAT CZTI

Data Quality Report

Orbit 20180619_G08_081T01_9000002178_level2

Creation date: 2025-11-23T01:25:48.352077
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_081T01_9000002178cztM0_level2.fits modeM0/AS1G08_081T01_9000002178cztM0_level2_quad_clean.evt
Size (bytes)649,739,520598,351,680
Size619.6 MB 570.6 MB
Events in quadrant A3,962,7843,559,458
Events in quadrant B3,822,3643,519,726
Events in quadrant C3,927,0143,330,098
Events in quadrant D3,482,3603,228,416

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01649170
B01420470
C01403620
D01392180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013300
B013300
C013300
D013300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01110
B01110
C01110
D01110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6537218032.758062%
B6537210001.529707%
C653726010.919354%
D653726380.975953%

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 76412 65359 0 0 0.00% 0.00%
B 76411 65358 0 0 0.00% 0.00%
C 76412 65361 0 0 0.00% 0.00%
D 76412 65360 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 3872 11.25 1033 968 258.2
A 7 110 3099 8.25 1033 968 258.2
A 15 236 3054 8.08 1033 968 258.2
B 2 9 3295 11.59 1010 964 201.1
B 3 17 2528 7.78 1010 964 201.1
B 5 128 2468 7.48 1010 964 201.1
C 1 80 2888 7.13 1037 967 269.3
C 1 81 2808 6.84 1037 967 269.3
C 12 241 2741 6.59 1037 967 269.3
D 6 231 2619 6.46 993 905 265.3
D 3 14 2529 6.12 993 905 265.3
D 10 189 2418 5.7 993 905 265.3

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