ASTROSAT CZTI

Data Quality Report

Orbit 24750

Creation date: 2024-06-27T19:09:27.416387
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/AS1A07_018T08_9000003622_24750cztM0_level2.evt modeM0/AS1A07_018T08_9000003622_24750cztM0_level2_quad_clean.evt
Size (bytes)1,137,640,320207,973,440
Size1.1 GB 198.3 MB
Events in quadrant A7,537,7821,333,180
Events in quadrant B7,921,1651,354,927
Events in quadrant C8,241,5841,282,794
Events in quadrant D9,692,6051,245,685

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03220
B03220
C03220
D03220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0323153
B0333553
C0345223
D0394513

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0330

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15684470.299668%
B156851140.726809%
C156841791.141290%
D156842231.421831%

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 19089 15687 1 1 0.01% 0.01%
B 19090 15688 4 4 0.02% 0.03%
C 19089 15687 1 1 0.01% 0.01%
D 19089 15687 130 130 0.68% 0.83%

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 13 254 26940 64.56 1951 1915 387.6
A 3 137 16926 38.73 1951 1915 387.6
A 0 226 16926 38.73 1951 1915 387.6
B 0 189 154502 422.05 1936 1893 361.6
B 0 190 59391 159.01 1936 1893 361.6
B 12 111 44283 117.23 1936 1893 361.6
C 7 247 442659 1034.16 1850 1862 426.2
C 14 238 298431 695.79 1850 1862 426.2
C 10 91 201588 468.58 1850 1862 426.2
D 1 52 1307823 2915.17 1867 1817 448.0
D 8 195 1185660 2642.48 1867 1817 448.0
D 7 238 98926 216.76 1867 1817 448.0

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