ASTROSAT CZTI

Data Quality Report

Orbit 31787

Creation date: 2024-06-27T20:32:44.135436
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/AS1T04_036T01_9000004640_31787cztM0_level2.evt modeM0/AS1T04_036T01_9000004640_31787cztM0_level2_quad_clean.evt
Size (bytes)589,852,800113,572,800
Size562.5 MB 108.3 MB
Events in quadrant A3,930,348775,159
Events in quadrant B5,078,351784,455
Events in quadrant C3,540,201746,984
Events in quadrant D4,907,765712,464

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0155811
B0188491
C0144181
D0189251

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60223395.629359%
B60231712.839117%
C60232153.569650%
D60224387.273331%

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 7337 6023 107 107 1.46% 1.78%
B 7338 6024 5 5 0.07% 0.08%
C 7338 6024 29 29 0.40% 0.48%
D 7337 6023 266 266 3.63% 4.42%

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 629671 3722.65 850 835 168.9
A 13 6 12836 71.04 850 835 168.9
A 13 254 11792 64.86 850 835 168.9
B 6 159 1624432 10415.82 835 820 155.9
B 5 172 63354 401.17 835 820 155.9
B 0 229 28344 176.57 835 820 155.9
C 0 10 174540 940.05 804 813 184.8
C 14 238 135111 726.7 804 813 184.8
C 4 175 26267 137.73 804 813 184.8
D 8 195 640162 3307.4 812 794 193.3
D 12 218 551847 2850.55 812 794 193.3
D 13 249 407929 2106.07 812 794 193.3

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