ASTROSAT CZTI

Data Quality Report

Orbit 56836

Creation date: 2026-03-31T11:14:17.014964
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_083T03_9000006562_56836cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56836cztM0_level2_quad_clean.evt
Size (bytes)521,222,400100,278,720
Size497.1 MB 95.6 MB
Events in quadrant A4,467,798660,906
Events in quadrant B5,314,199680,191
Events in quadrant C3,868,333618,174
Events in quadrant D5,084,665575,329

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0179522
B0206832
C0167392
D0202252

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71971742.417674%
B71976298.739753%
C71982944.084468%
D71984606.390664%

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 8662 7199 36 36 0.42% 0.50%
B 8662 7199 299 299 3.45% 4.15%
C 8663 7199 186 186 2.15% 2.58%
D 8663 7200 314 314 3.62% 4.36%

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 14 1177963 6125.62 777 757 192.2
A 10 251 218176 1131.34 777 757 192.2
A 7 64 43441 222.11 777 757 192.2
B 5 185 1789070 11108.55 747 718 161.0
B 10 16 254124 1574.06 747 718 161.0
B 8 128 55880 342.64 747 718 161.0
C 6 13 259191 1268.43 752 743 203.8
C 12 249 237262 1160.8 752 743 203.8
C 15 230 146271 714.23 752 743 203.8
D 2 249 1011052 4886.42 741 707 206.8
D 8 240 760469 3674.5 741 707 206.8
D 2 31 124690 599.63 741 707 206.8

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