ASTROSAT CZTI

Data Quality Report

Orbit 20190226_A05_072T02_9000002736_level2

Creation date: 2025-11-28T00:34:39.618082
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/AS1A05_072T02_9000002736cztM0_level2.fits modeM0/AS1A05_072T02_9000002736cztM0_level2_quad_clean.evt
Size (bytes)584,533,440504,702,720
Size557.5 MB 481.3 MB
Events in quadrant A3,571,5942,881,134
Events in quadrant B3,443,1982,940,830
Events in quadrant C3,542,5702,826,627
Events in quadrant D3,074,8742,566,070

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01338050
B01351480
C01326220
D01376950

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0990
B0990
C0990
D0990

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012080
B012080
C012080
D012080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5932914022.363094%
B5932918113.052470%
C5932911821.992280%
D5932913842.332755%

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 69234 59301 0 0 0.00% 0.00%
B 69235 59313 0 0 0.00% 0.00%
C 69235 59322 0 0 0.00% 0.00%
D 69235 59295 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 2945 8.9 930 869 233.2
A 7 110 2905 8.73 930 869 233.2
A 9 19 2623 7.52 930 869 233.2
B 2 9 2874 11.2 910 867 179.3
B 2 8 2365 8.36 910 867 179.3
B 5 225 2300 7.99 910 867 179.3
C 1 80 2804 8.03 934 872 240.7
C 1 81 2725 7.7 934 872 240.7
C 3 126 2480 6.68 934 872 240.7
D 10 190 2299 6.5 876 798 230.7
D 3 14 2195 6.05 876 798 230.7
D 6 231 2191 6.04 876 798 230.7

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