ASTROSAT CZTI

Data Quality Report

Orbit 18141

Creation date: 2024-06-27T17:45:50.585840
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/AS1T03_035T01_9000002696_18141cztM0_level2.evt modeM0/AS1T03_035T01_9000002696_18141cztM0_level2_quad_clean.evt
Size (bytes)623,580,48087,935,040
Size594.7 MB 83.9 MB
Events in quadrant A4,227,888528,079
Events in quadrant B4,251,057537,776
Events in quadrant C4,073,633521,436
Events in quadrant D5,776,423505,490

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0178072
B0178412
C0172562
D0228342

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01660
C01660
D01660

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A82081702.071150%
B82092282.777439%
C82092172.643440%
D82093384.117432%

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 8703 8210 39 39 0.45% 0.48%
B 8704 8211 18 18 0.21% 0.22%
C 8704 8211 0 0 0.00% 0.00%
D 8704 8211 167 167 1.92% 2.03%

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 15 174 168168 784.41 1043 1018 213.1
A 4 2 44481 203.97 1043 1018 213.1
A 0 226 9141 38.12 1043 1018 213.1
B 6 36 59251 290.5 1042 1018 200.5
B 0 189 36204 175.53 1042 1018 200.5
B 0 197 25018 119.72 1042 1018 200.5
C 14 238 152811 646.06 998 1000 235.0
C 3 233 21303 86.4 998 1000 235.0
C 5 218 9961 38.14 998 1000 235.0
D 7 238 1551326 6177.47 1007 976 251.0
D 12 110 220809 875.94 1007 976 251.0
D 13 104 77804 306.13 1007 976 251.0

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