ASTROSAT CZTI

Data Quality Report

Orbit 20200121_A07_135T02_9000003450_level2

Creation date: 2025-12-08T08:07:21.498950
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/AS1A07_135T02_9000003450cztM0_level2.fits modeM0/AS1A07_135T02_9000003450cztM0_level2_quad_clean.evt
Size (bytes)848,905,920700,185,600
Size809.6 MB 667.7 MB
Events in quadrant A5,311,9464,101,383
Events in quadrant B5,071,5884,099,041
Events in quadrant C5,163,5663,984,556
Events in quadrant D4,288,5763,152,501

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01230

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01791680
B01811550
C01973270
D02981800

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017480
B017480
C017440
D017520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8558210231.195345%
B8551113381.564711%
C8557632693.819996%
D854641459617.078536%

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 111780 86093 0 0 0.00% 0.00%
B 111780 86005 0 0 0.00% 0.00%
C 111780 86072 0 0 0.00% 0.00%
D 111780 85921 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 5201 11.44 1382 1292 341.7
A 7 110 4229 8.59 1382 1292 341.7
A 0 30 3912 7.67 1382 1292 341.7
B 2 9 4091 10.67 1338 1272 264.3
B 2 8 3396 8.04 1338 1272 264.3
B 5 225 3380 7.98 1338 1272 264.3
C 3 126 3533 6.55 1365 1280 344.1
C 12 241 3478 6.39 1365 1280 344.1
C 9 209 3450 6.31 1365 1280 344.1
D 10 189 3037 5.95 1224 1120 322.0
D 13 238 2995 5.82 1224 1120 322.0
D 6 231 2995 5.82 1224 1120 322.0

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