ASTROSAT CZTI

Data Quality Report

Orbit 35040

Creation date: 2022-03-22T20:34:01.729416
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/AS1A10_123T17_9000005018_35040cztM0_level2.evt modeM0/AS1A10_123T17_9000005018_35040cztM0_level2_quad_clean.evt
Size (bytes)1,924,004,160298,889,280
Size1.8 GB 285.0 MB
Events in quadrant A11,693,5761,872,334
Events in quadrant B12,850,8491,892,565
Events in quadrant C12,488,0221,858,456
Events in quadrant D19,555,1871,714,111

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0508126
B0540205
C0514735
D0754165

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05080
B05080
C05080
D05080

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0740
B0740
C0740
D0740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A24937390.156394%
B249372390.958415%
C24937540.216546%
D249379193.685287%

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 32284 24939 8 8 0.02% 0.03%
B 32284 24938 173 173 0.54% 0.69%
C 32284 24939 36 36 0.11% 0.14%
D 32284 24939 921 921 2.85% 3.69%

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 10 83 244316 413.54 2926 2867 583.9
A 13 6 41672 66.46 2926 2867 583.9
A 13 254 35554 55.98 2926 2867 583.9
B 5 200 535173 965.01 2893 2812 551.7
B 5 172 363122 653.13 2893 2812 551.7
B 0 190 182125 325.04 2893 2812 551.7
C 15 214 1022875 1559.54 2847 2866 654.0
C 0 10 139743 209.28 2847 2866 654.0
C 14 67 112616 167.8 2847 2866 654.0
D 8 195 3468597 5077.04 2809 2730 682.7
D 14 52 2430989 3557.08 2809 2730 682.7
D 13 249 1104478 1613.92 2809 2730 682.7

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