ASTROSAT CZTI

Data Quality Report

Orbit 57178

Creation date: 2026-04-23T12:52:10.654613
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_070T08_9000006568_57178cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57178cztM0_level2_quad_clean.evt
Size (bytes)464,253,12093,306,240
Size442.7 MB 89.0 MB
Events in quadrant A2,819,861628,666
Events in quadrant B3,734,323657,560
Events in quadrant C6,502,373525,017
Events in quadrant D3,609,101548,903

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0136871
B0160811
C0240331
D0156651

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6674891.333533%
B66753465.183521%
C6675104915.715356%
D66751852.771536%

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 7329 6675 2 2 0.03% 0.03%
B 7330 6676 152 152 2.07% 2.28%
C 7330 6675 765 765 10.44% 11.46%
D 7330 6676 70 70 0.95% 1.05%

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 3 14 30962 172.86 709 689 175.1
A 10 251 27352 152.24 709 689 175.1
A 13 254 12234 65.92 709 689 175.1
B 10 16 511178 3463.06 695 669 147.4
B 5 185 265275 1794.97 695 669 147.4
B 2 249 57156 383.18 695 669 147.4
C 15 224 3705388 21110.89 648 641 175.5
C 14 67 81525 460.9 648 641 175.5
C 14 254 77281 436.72 648 641 175.5
D 2 249 361958 1878.54 680 648 192.3
D 8 240 181258 939.04 680 648 192.3
D 15 142 107993 558.11 680 648 192.3

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