ASTROSAT CZTI

Data Quality Report

Orbit 20210514_A10_121T02_9000004378_level2

Creation date: 2025-12-25T15:22:01.007150
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/AS1A10_121T02_9000004378cztM0_level2.fits modeM0/AS1A10_121T02_9000004378cztM0_level2_quad_clean.evt
Size (bytes)2,550,758,4001,792,103,040
Size2.4 GB 1.7 GB
Events in quadrant A17,700,24910,856,484
Events in quadrant B15,870,06511,012,224
Events in quadrant C16,302,99510,543,417
Events in quadrant D14,435,9598,920,856

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04082440
B05797930
C04396550
D05765310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A038140
B038140
C039180
D038140

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03080
B03080
C03080
D03080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18954225191.328993%
B18863042512.253618%
C18865760673.215889%
D1890851922010.164741%

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 232107 190678 0 0 0.00% 0.00%
B 232107 188621 0 0 0.00% 0.00%
C 232107 189105 0 0 0.00% 0.00%
D 232107 189322 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 10824 6.76 4651 4456 941.6
A 7 110 10176 6.07 4651 4456 941.6
A 14 95 10025 5.91 4651 4456 941.6
B 2 9 9990 7.44 4235 4086 793.7
B 5 232 9497 6.82 4235 4086 793.7
B 5 225 8548 5.62 4235 4086 793.7
C 3 203 11182 7.04 4341 4202 991.9
C 9 209 10736 6.59 4341 4202 991.9
C 3 202 10560 6.41 4341 4202 991.9
D 15 46 8817 5.21 4165 3931 937.8
D 6 231 8730 5.12 4165 3931 937.8
D -1 -1 -1 -1.0 4165 3931 937.8

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