ASTROSAT CZTI

Data Quality Report

Orbit 54491

Creation date: 2025-10-25T11:13:29.772832
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_127T09_9000006520_54491cztM0_level2.fits modeM0/AS1A14_127T09_9000006520_54491cztM0_level2_quad_clean.evt
Size (bytes)466,312,320100,488,960
Size444.7 MB 95.8 MB
Events in quadrant A3,327,572667,729
Events in quadrant B3,758,910704,158
Events in quadrant C4,954,644603,900
Events in quadrant D4,669,029573,291

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151750
B0162770
C0198040
D0188472

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7090230.324401%
B70901772.496474%
C70904145.839210%
D70903184.485190%

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 7090 7090 10 10 0.14% 0.14%
B 7090 7090 50 50 0.71% 0.71%
C 7090 7090 404 404 5.70% 5.70%
D 7090 7090 307 307 4.33% 4.33%

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 12 15 115099 604.43 767 748 189.2
A 14 235 66731 348.77 767 748 189.2
A 7 237 50122 260.98 767 748 189.2
B 0 213 229571 1381.73 752 721 165.6
B 5 185 166190 999.05 752 721 165.6
B 7 0 141990 852.94 752 721 165.6
C 15 147 970054 4883.36 724 717 198.5
C 4 5 834329 4199.6 724 717 198.5
C 6 223 82697 413.0 724 717 198.5
D 8 176 1017615 4953.68 727 693 205.3
D 7 70 326032 1584.81 727 693 205.3
D 2 172 226592 1100.41 727 693 205.3

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