ASTROSAT CZTI

Data Quality Report

Orbit 53277

Creation date: 2025-08-03T22:47:20.574986
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/AS1C09_011T08_9000006492_53277cztM0_level2.fits modeM0/AS1C09_011T08_9000006492_53277cztM0_level2_quad_clean.evt
Size (bytes)637,899,84076,049,280
Size608.3 MB 72.5 MB
Events in quadrant A3,389,763570,361
Events in quadrant B3,477,560597,617
Events in quadrant C12,081,751212,933
Events in quadrant D4,196,072501,158

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0143041
B0145791
C0400451
D0166551

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60191823.023758%
B60192584.286426%
C6020379162.973422%
D60202904.817276%

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 6919 6019 112 112 1.62% 1.86%
B 6919 6019 173 173 2.50% 2.87%
C 6919 6019 3779 3779 54.62% 62.78%
D 6920 6020 251 251 3.63% 4.17%

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 62 290430 1841.3 630 616 157.4
A 3 14 148003 936.41 630 616 157.4
A 0 8 118040 746.04 630 616 157.4
B 2 249 296275 2215.36 623 602 133.5
B 10 28 249749 1866.76 623 602 133.5
B 4 81 178294 1331.37 623 602 133.5
C 1 241 6887167 61012.0 406 403 112.9
C 10 22 986274 8734.14 406 403 112.9
C 15 224 631157 5588.05 406 403 112.9
D 3 12 558373 3188.41 609 582 174.9
D 11 176 340964 1945.67 609 582 174.9
D 12 128 212721 1212.61 609 582 174.9

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