ASTROSAT CZTI

Data Quality Report

Orbit 35911

Creation date: 2022-06-09T00:41:03.338986
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/AS1A11_080T01_9000005146_35911cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35911cztM0_level2_quad_clean.evt
Size (bytes)306,521,28038,162,880
Size292.3 MB 36.4 MB
Events in quadrant A1,706,680255,965
Events in quadrant B3,121,092199,381
Events in quadrant C1,764,478252,884
Events in quadrant D2,474,222221,888

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0192
B0192
C0192
D0181

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09134
B09828
C010128
D09424

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0103703387
B0169005684
C0103773254
D0158016446

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3255110.337942%
B304962820.596917%
C3309290.876398%
D29661745.866487%

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 7024 3830 2 2 0.03% 0.05%
B 7034 3683 394 394 5.60% 10.70%
C 6985 3874 25 25 0.36% 0.65%
D 7014 3568 95 95 1.35% 2.66%

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 91121 1112.36 400 395 81.6
A 9 143 61323 747.01 400 395 81.6
A 13 254 5278 59.87 400 395 81.6
B 5 172 1325176 20299.17 338 330 65.3
B 5 63 420094 6431.59 338 330 65.3
B 5 255 34687 526.41 338 330 65.3
C 15 214 138914 1553.18 384 387 89.2
C 0 10 121156 1354.08 384 387 89.2
C 12 251 8610 92.2 384 387 89.2
D 12 227 546188 6478.19 341 332 84.3
D 13 249 249988 2962.9 341 332 84.3
D 8 195 213053 2524.56 341 332 84.3

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