ASTROSAT CZTI

Data Quality Report

Orbit 55635

Creation date: 2026-01-09T23:01:42.747443
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_021T06_9000006538_55635cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55635cztM0_level2_quad_clean.evt
Size (bytes)463,452,48091,575,360
Size442.0 MB 87.3 MB
Events in quadrant A6,866,530499,050
Events in quadrant B2,842,564678,602
Events in quadrant C2,839,915596,805
Events in quadrant D4,099,855544,520

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0251072
B0134352
C0137372
D0169342

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6508147422.649047%
B6508831.275353%
C6507490.753035%
D65072884.426003%

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 7653 6508 1385 1385 18.10% 21.28%
B 7653 6508 4 4 0.05% 0.06%
C 7652 6507 21 21 0.27% 0.32%
D 7652 6507 227 227 2.97% 3.49%

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 12 115 3804493 24538.5 624 609 155.0
A 15 32 194948 1253.66 624 609 155.0
A 8 249 130697 839.19 624 609 155.0
B 5 185 114752 785.84 676 651 145.2
B 12 111 17478 115.89 676 651 145.2
B 11 111 16227 107.28 676 651 145.2
C 13 3 133883 739.84 654 648 180.1
C 6 223 55903 306.83 654 648 180.1
C 12 250 41218 225.28 654 648 180.1
D 11 129 946860 5131.76 646 616 184.4
D 10 181 178924 967.02 646 616 184.4
D 15 234 129523 699.1 646 616 184.4

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