ASTROSAT CZTI

Data Quality Report

Orbit 58173

Creation date: 2026-06-30T18:16:21.443506
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_042T02_9000006586_58173cztM0_level2.fits modeM0/AS1A14_042T02_9000006586_58173cztM0_level2_quad_clean.evt
Size (bytes)736,657,92073,359,360
Size702.5 MB 70.0 MB
Events in quadrant A2,648,437578,197
Events in quadrant B12,735,202216,196
Events in quadrant C2,943,668545,821
Events in quadrant D8,467,424453,461

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0124031
B0420701
C0133441
D0294481

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6113280.458040%
B6114440171.982336%
C6114590.964998%
D611491514.965653%

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 6928 6114 1 1 0.01% 0.02%
B 6929 6115 3802 3802 54.87% 62.17%
C 6929 6115 41 41 0.59% 0.67%
D 6929 6115 927 927 13.38% 15.16%

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 28868 171.82 666 650 164.2
A 4 3 13634 79.06 666 650 164.2
A 2 79 13628 79.02 666 650 164.2
B 10 128 10786386 112233.85 447 431 96.1
B 0 79 45388 467.8 447 431 96.1
B 5 185 41821 430.69 447 431 96.1
C 6 223 215045 1216.42 644 637 176.3
C 14 254 81047 456.2 644 637 176.3
C 14 245 48529 271.71 644 637 176.3
D 12 110 4778313 28160.92 601 574 169.7
D 12 128 601923 3544.47 601 574 169.7
D 8 240 262673 1544.86 601 574 169.7

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