ASTROSAT CZTI

Data Quality Report

Orbit 53479

Creation date: 2025-08-17T14:35:39.950622
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_002T06_9000006496_53479cztM0_level2.fits modeM0/AS1A14_002T06_9000006496_53479cztM0_level2_quad_clean.evt
Size (bytes)2,409,013,440217,978,560
Size2.2 GB 207.9 MB
Events in quadrant A28,722,9151,193,651
Events in quadrant B9,563,1261,892,367
Events in quadrant C39,412,747677,789
Events in quadrant D10,018,9881,532,989

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03860
B03860
C03860
D03860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0985183
B0420303
C01301023
D0440094

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18890683036.156697%
B188914482.371500%
C188911204163.739347%
D188904762.519852%

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 20270 18890 6081 6081 30.00% 32.19%
B 20271 18891 103 103 0.51% 0.55%
C 20270 18890 11637 11637 57.41% 61.60%
D 20270 18893 372 372 1.84% 1.97%

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 63 14319161 34254.9 1707 1669 418.0
A 3 62 4303476 10292.16 1707 1669 418.0
A 15 174 2977130 7118.85 1707 1669 418.0
B 10 254 467223 1072.61 2018 1941 433.8
B 5 185 285460 653.59 2018 1941 433.8
B 15 20 193486 441.57 2018 1941 433.8
C 7 64 16049088 45172.57 1300 1288 355.3
C 1 241 7765707 21855.88 1300 1288 355.3
C 15 224 4001182 11259.21 1300 1288 355.3
D 3 12 999899 1826.49 1954 1869 546.4
D 5 173 169240 306.3 1954 1869 546.4
D 7 70 148365 268.1 1954 1869 546.4

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