ASTROSAT CZTI

Data Quality Report

Orbit 56175

Creation date: 2026-02-14T23:08:04.268729
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_083T04_9000006550_56175cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56175cztM0_level2_quad_clean.evt
Size (bytes)663,969,60079,344,000
Size633.2 MB 75.7 MB
Events in quadrant A11,512,005311,886
Events in quadrant B4,198,412617,144
Events in quadrant C4,459,321537,730
Events in quadrant D3,931,869506,331

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0384933
B0168371
C0178001
D0161431

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6143317351.652287%
B61431933.141787%
C61443295.354818%
D61442884.687500%

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 6923 6144 2826 2826 40.82% 46.00%
B 6923 6144 55 55 0.79% 0.90%
C 6924 6145 288 288 4.16% 4.69%
D 6924 6145 203 203 2.93% 3.30%

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 4785228 38980.87 494 482 122.7
A 15 32 2253814 18357.68 494 482 122.7
A 8 176 838813 6829.8 494 482 122.7
B 15 52 827084 6097.3 639 616 135.5
B 5 185 143154 1051.58 639 616 135.5
B 10 247 137690 1011.27 639 616 135.5
C 12 254 919781 5500.11 612 606 167.1
C 9 38 610056 3646.79 612 606 167.1
C 1 12 146004 870.02 612 606 167.1
D 8 240 508947 2937.21 608 578 173.1
D 11 129 278821 1607.6 608 578 173.1
D 12 191 247307 1425.53 608 578 173.1

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