ASTROSAT CZTI

Data Quality Report

Orbit 20180917_T02_101T01_9000002372_level2

Creation date: 2025-11-24T18:20:46.114877
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/AS1T02_101T01_9000002372cztM0_level2.fits modeM0/AS1T02_101T01_9000002372cztM0_level2_quad_clean.evt
Size (bytes)132,989,760161,066,880
Size126.8 MB 153.6 MB
Events in quadrant A799,7121,002,932
Events in quadrant B770,6281,007,528
Events in quadrant C789,044988,356
Events in quadrant D688,622899,411

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02900
B02900
C02900
D02900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300540
B0294690
C0289430
D0310670

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A141801711.205924%
B141801701.198872%
C141801911.346968%
D141802591.826516%

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 15825 14173 0 0 0.00% 0.00%
B 15825 14178 0 0 0.00% 0.00%
C 15825 14178 0 0 0.00% 0.00%
D 15825 14172 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 14 188 771 11.0 207 195 52.4
A 0 29 740 10.4 207 195 52.4
A 14 204 689 9.43 207 195 52.4
B 2 9 672 11.03 204 195 43.2
B 2 8 569 8.65 204 195 43.2
B 14 254 515 7.4 204 195 43.2
C 7 111 554 6.53 208 195 54.9
C 12 241 543 6.33 208 195 54.9
C 3 158 539 6.26 208 195 54.9
D 10 189 514 6.22 196 178 54.0
D 6 231 512 6.18 196 178 54.0
D 3 14 506 6.07 196 178 54.0

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