ASTROSAT CZTI

Data Quality Report

Orbit 59277

Creation date: 2026-09-11T17:37:26.397756
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_9000006606_59277cztM0_level2.fits modeM0/AS1A14_021T06_9000006606_59277cztM0_level2_quad_clean.evt
Size (bytes)1,931,063,040229,510,080
Size1.8 GB 218.9 MB
Events in quadrant A11,252,0851,667,097
Events in quadrant B10,099,1841,863,785
Events in quadrant C19,220,0111,151,913
Events in quadrant D29,476,625987,166

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0468973
B0433413
C0704023
D01005073

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03760
B03760
C03760
D03760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A185498704.690280%
B185497063.806135%
C18549583831.473395%
D18549741839.991374%

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 19749 18552 428 428 2.17% 2.31%
B 19749 18552 355 355 1.80% 1.91%
C 19749 18552 2917 2917 14.77% 15.72%
D 19749 18550 5881 5881 29.78% 31.70%

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 15 233 2423733 5003.87 1962 1916 484.0
A 14 238 799380 1647.69 1962 1916 484.0
A 10 251 127034 258.51 1962 1916 484.0
B 5 185 539554 1289.13 1972 1897 417.1
B 4 201 365968 872.93 1972 1897 417.1
B 4 236 343281 818.53 1972 1897 417.1
C 15 198 11319638 26337.86 1568 1552 429.7
C 12 252 1295187 3010.37 1568 1552 429.7
C 15 147 127837 293.87 1568 1552 429.7
D 12 110 19043753 40168.16 1653 1574 474.1
D 2 249 1963106 4137.72 1653 1574 474.1
D 11 129 713579 1501.93 1653 1574 474.1

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

TCT plots

Parameter TCT0 TCT_healed
Tct