ASTROSAT CZTI

Data Quality Report

Orbit 26642

Creation date: 2024-06-27T19:29:34.681911
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/AS1A09_104T02_9000003826_26642cztM0_level2.evt modeM0/AS1A09_104T02_9000003826_26642cztM0_level2_quad_clean.evt
Size (bytes)583,945,920107,352,000
Size556.9 MB 102.4 MB
Events in quadrant A3,746,555708,998
Events in quadrant B4,241,620696,823
Events in quadrant C3,792,221689,181
Events in quadrant D5,360,306599,540

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0162980
B0175700
C0163260
D0208780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01814
B01813
C01611
D01915

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7883290.367880%
B7765290.373471%
C7920600.757576%
D72615377.395676%

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 14106 9099 2 2 0.01% 0.02%
B 14102 8904 0 0 0.00% 0.00%
C 14104 9067 8 8 0.06% 0.09%
D 14069 8309 341 341 2.42% 4.10%

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 13 145562 766.37 933 917 188.7
A 13 254 12526 61.51 933 917 188.7
A 3 137 8378 39.53 933 917 188.7
B 0 189 489066 2797.42 913 894 174.5
B 3 112 154463 880.01 913 894 174.5
B 12 111 20298 111.19 913 894 174.5
C 14 238 145561 683.69 897 903 211.6
C 3 233 58014 269.92 897 903 211.6
C 15 208 48951 227.08 897 903 211.6
D 1 52 1668364 8443.52 798 782 197.5
D 7 80 458703 2318.6 798 782 197.5
D 12 233 103157 518.36 798 782 197.5

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