ASTROSAT CZTI

Data Quality Report

Orbit 20180614_G08_019T01_9000002166_level2

Creation date: 2025-11-22T22:57:30.055669
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/AS1G08_019T01_9000002166cztM0_level2.fits modeM0/AS1G08_019T01_9000002166cztM0_level2_quad_clean.evt
Size (bytes)237,833,280221,607,360
Size226.8 MB 211.3 MB
Events in quadrant A1,425,1201,308,896
Events in quadrant B1,385,8081,287,726
Events in quadrant C1,391,1061,199,140
Events in quadrant D1,240,1441,154,180

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290
B0290
C0290
D0290

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0668330
B0532600
C0707750
D0570040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05180
B05180
C05180
D05180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A256063311.292666%
B256062550.995860%
C256062100.820120%
D256063511.370772%

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 28456 25601 0 0 0.00% 0.00%
B 28456 25601 0 0 0.00% 0.00%
C 28456 25603 0 0 0.00% 0.00%
D 28456 25600 0 0 0.00% 0.00%

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 0 29 1347 10.61 370 346 94.3
A 7 110 1187 8.92 370 346 94.3
A 15 236 1115 8.15 370 346 94.3
B 2 9 1179 11.11 365 348 74.8
B 5 232 939 7.9 365 348 74.8
B 3 17 919 7.63 365 348 74.8
C 12 241 965 6.51 367 340 96.0
C 3 126 951 6.37 367 340 96.0
C 7 111 938 6.23 367 340 96.0
D 3 14 926 6.26 354 321 96.6
D 6 231 911 6.11 354 321 96.6
D 1 19 887 5.86 354 321 96.6

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