ASTROSAT CZTI

Data Quality Report

Orbit 58502

Creation date: 2026-07-21T12:22:46.135155
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_044T04_9000006592_58502cztM0_level2.fits modeM0/AS1A14_044T04_9000006592_58502cztM0_level2_quad_clean.evt
Size (bytes)552,556,800117,316,800
Size527.0 MB 111.9 MB
Events in quadrant A4,711,294761,394
Events in quadrant B4,167,047812,131
Events in quadrant C5,321,707733,844
Events in quadrant D5,621,209679,015

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0198321
B0179541
C0214532
D0225121

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A81423364.126750%
B81433784.642024%
C81424054.974208%
D81424825.919921%

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 8752 8144 129 129 1.47% 1.58%
B 8753 8145 16 16 0.18% 0.20%
C 8752 8144 241 241 2.75% 2.96%
D 8752 8144 353 353 4.03% 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 4 249 678569 2893.75 953 927 234.2
A 10 17 136183 577.58 953 927 234.2
A 13 248 65931 277.59 953 927 234.2
B 0 186 115779 557.61 943 904 206.0
B 0 157 47313 225.27 943 904 206.0
B 5 250 45604 216.98 943 904 206.0
C 15 157 1044904 4140.94 918 910 252.1
C 12 252 291854 1154.01 918 910 252.1
C 9 237 197159 778.41 918 910 252.1
D 3 12 821184 3241.64 905 864 253.1
D 8 240 424609 1674.5 905 864 253.1
D 8 160 403080 1589.43 905 864 253.1

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