ASTROSAT CZTI

Data Quality Report

Orbit 58139

Creation date: 2026-07-01T13:44:13.305417
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_58139cztM0_level2.fits modeM0/AS1A14_042T02_9000006586_58139cztM0_level2_quad_clean.evt
Size (bytes)990,437,76089,720,640
Size944.6 MB 85.6 MB
Events in quadrant A4,091,805756,651
Events in quadrant B18,133,466178,078
Events in quadrant C3,989,089722,010
Events in quadrant D9,834,832509,504

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B040
C040
D040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0178251
B0593915
C0176891
D0346821

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79131722.173638%
B7912647081.774520%
C79121091.377654%
D7912216227.325581%

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 7913 7913 119 119 1.50% 1.50%
B 7911 7911 5962 5962 75.36% 75.36%
C 7912 7912 97 97 1.23% 1.23%
D 7912 7912 1869 1869 23.62% 23.62%

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 10 251 398239 1831.87 875 853 216.9
A 13 248 125173 573.09 875 853 216.9
A 11 3 85304 389.3 875 853 216.9
B 10 128 15883345 207299.22 352 341 76.6
B 2 249 600404 7831.81 352 341 76.6
B 10 247 76854 998.62 352 341 76.6
C 12 250 347813 1502.51 846 840 230.9
C 12 252 216319 933.1 846 840 230.9
C 15 208 67642 289.28 846 840 230.9
D 12 110 5413033 25265.55 756 724 214.2
D 8 240 882271 4115.21 756 724 214.2
D 5 32 109108 505.95 756 724 214.2

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