ASTROSAT CZTI

Data Quality Report

Orbit 55528

Creation date: 2026-01-21T18:22:11.092092
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/AS1A14_099T01_9000006536_55528cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55528cztM0_level2_quad_clean.evt
Size (bytes)518,673,600101,957,760
Size494.6 MB 97.2 MB
Events in quadrant A3,655,195675,599
Events in quadrant B3,327,345726,927
Events in quadrant C4,447,478639,674
Events in quadrant D7,190,892526,843

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0165252
B0155542
C0187352
D0268852

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74441181.585169%
B7445831.114842%
C74452553.425118%
D7445122616.467428%

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 8804 7446 73 73 0.83% 0.98%
B 8805 7447 15 15 0.17% 0.20%
C 8805 7447 196 196 2.23% 2.63%
D 8805 7447 1018 1018 11.56% 13.67%

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 8 431744 2241.92 774 753 192.2
A 4 205 85744 442.1 774 753 192.2
A 4 159 50680 259.71 774 753 192.2
B 0 171 68995 413.26 771 743 165.2
B 7 252 31698 187.43 771 743 165.2
B 5 236 31223 184.55 771 743 165.2
C 9 38 594262 2884.86 752 746 205.7
C 15 147 583327 2831.71 752 746 205.7
C 13 3 107223 517.55 752 746 205.7
D 11 129 3415128 17368.5 692 659 196.6
D 8 160 258462 1311.38 692 659 196.6
D 8 245 222100 1126.41 692 659 196.6

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