ASTROSAT CZTI

Data Quality Report

Orbit 20180227_A04_067T01_9000001926_level2

Creation date: 2025-11-19T18:59:28.102714
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/AS1A04_067T01_9000001926cztM0_level2.fits modeM0/AS1A04_067T01_9000001926cztM0_level2_quad_clean.evt
Size (bytes)566,815,680513,682,560
Size540.6 MB 489.9 MB
Events in quadrant A3,482,7083,033,096
Events in quadrant B3,040,6102,669,612
Events in quadrant C3,431,6702,934,406
Events in quadrant D2,958,8662,671,576

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01010
B01000
C01020
D01030

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011200
B012860
C012840
D012820

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01301260
B01823230
C01361240
D01559570

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A620035540.893505%
B61937897814.495374%
C619959061.461408%
D6196419873.206701%

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 75203 62277 0 0 0.00% 0.00%
B 75203 60254 0 0 0.00% 0.00%
C 75203 62282 0 0 0.00% 0.00%
D 75203 62244 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 3349 11.13 906 853 224.2
A 7 110 2976 9.47 906 853 224.2
A 9 19 2726 8.36 906 853 224.2
B 2 9 2669 12.13 801 766 156.8
B 2 8 2041 8.13 801 766 156.8
B 3 17 2035 8.09 801 766 156.8
C 1 81 2567 7.36 906 846 233.9
C 1 80 2544 7.26 906 846 233.9
C 12 241 2485 7.01 906 846 233.9
D 6 231 2183 6.22 844 767 227.7
D 1 19 2082 5.78 844 767 227.7
D 6 67 2081 5.77 844 767 227.7

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