ASTROSAT CZTI

Data Quality Report

Orbit 25927

Creation date: 2024-06-27T19:22:55.995445
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/AS1T03_214T01_9000003758_25927cztM0_level2.evt modeM0/AS1T03_214T01_9000003758_25927cztM0_level2_quad_clean.evt
Size (bytes)903,574,08081,138,240
Size861.7 MB 77.4 MB
Events in quadrant A16,489,047142,512
Events in quadrant B3,150,835648,903
Events in quadrant C3,083,224614,679
Events in quadrant D4,209,520602,738

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0533700
B0134970
C0133600
D0169180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6390634999.358372%
B6390420.657277%
C6390550.860720%
D63901412.206573%

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 7274 6389 5927 5927 81.48% 92.77%
B 7275 6391 2 2 0.03% 0.03%
C 7275 6391 2 2 0.03% 0.03%
D 7275 6391 103 103 1.42% 1.61%

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 15493030 294736.04 257 252 52.6
A 13 254 3724 66.05 257 252 52.6
A 3 137 2177 36.62 257 252 52.6
B 0 190 80958 552.92 767 751 145.1
B 15 33 41139 278.42 767 751 145.1
B 0 219 21343 141.95 767 751 145.1
C 14 238 117794 690.73 728 733 169.5
C 3 233 87311 510.86 728 733 169.5
C 2 16 42809 248.27 728 733 169.5
D 1 52 1323297 7573.28 728 710 174.6
D 7 80 98584 560.44 728 710 174.6
D 2 234 29749 166.28 728 710 174.6

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