ASTROSAT CZTI

Data Quality Report

Orbit 50657

Creation date: 2025-02-08T11:24:24.647849
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/AS1T05_241T01_9000006446_50657cztM0_level2.fits modeM0/AS1T05_241T01_9000006446_50657cztM0_level2_quad_clean.evt
Size (bytes)695,436,480113,587,200
Size663.2 MB 108.3 MB
Events in quadrant A5,259,783736,110
Events in quadrant B5,866,071809,596
Events in quadrant C8,847,809672,171
Events in quadrant D5,146,640661,643

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0212281
B0231311
C0318971
D0212871

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A80471722.137443%
B80472733.392569%
C804796311.967193%
D80473294.088480%

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 8572 8048 98 98 1.14% 1.22%
B 8572 8048 121 121 1.41% 1.50%
C 8572 8048 813 813 9.48% 10.10%
D 8572 8048 268 268 3.13% 3.33%

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 4 4 926513 4393.47 852 828 210.7
A 8 246 184912 873.7 852 828 210.7
A 4 3 153591 725.04 852 828 210.7
B 5 172 1290290 7181.24 850 819 179.6
B 5 185 257202 1427.83 850 819 179.6
B 4 206 218152 1210.36 850 819 179.6
C 15 174 1614425 7183.47 808 803 224.6
C 15 1 1494174 6648.14 808 803 224.6
C 4 5 641202 2850.91 808 803 224.6
D 7 110 284661 1255.38 818 787 226.1
D 2 153 264672 1166.98 818 787 226.1
D 10 102 233394 1028.66 818 787 226.1

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