ASTROSAT CZTI

Data Quality Report

Orbit 20846

Creation date: 2024-06-27T18:20:19.399758
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/AS1C04_001T01_9000003074_20846cztM0_level2.evt modeM0/AS1C04_001T01_9000003074_20846cztM0_level2_quad_clean.evt
Size (bytes)630,377,280115,367,040
Size601.2 MB 110.0 MB
Events in quadrant A3,303,854801,960
Events in quadrant B3,949,186776,902
Events in quadrant C3,276,151747,598
Events in quadrant D8,104,807696,461

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140851
B0161111
C0140061
D0285961

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6752941.392180%
B67521552.295616%
C67531231.821413%
D6753129719.206279%

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 7521 6751 0 0 0.00% 0.00%
B 7521 6751 73 73 0.97% 1.08%
C 7523 6753 11 11 0.15% 0.16%
D 7523 6753 1355 1355 18.01% 20.07%

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 2 79 134270 809.57 823 806 164.9
A 8 205 8401 46.07 823 806 164.9
A 0 226 7242 39.04 823 806 164.9
B 7 220 349794 2309.46 802 782 151.1
B 0 189 285854 1886.36 802 782 151.1
B 0 190 29343 188.99 802 782 151.1
C 14 238 122642 681.33 774 779 178.9
C 9 54 83237 461.02 774 779 178.9
C 3 233 24623 133.31 774 779 178.9
D 1 20 4545814 24597.12 770 748 184.8
D 1 52 413179 2232.01 770 748 184.8
D 1 239 70983 380.1 770 748 184.8

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