ASTROSAT CZTI

Data Quality Report

Orbit 20181005_C04_007T01_9000002408_level2

Creation date: 2025-11-25T01:12:06.087112
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/AS1C04_007T01_9000002408cztM0_level2.fits modeM0/AS1C04_007T01_9000002408cztM0_level2_quad_clean.evt
Size (bytes)191,592,000186,036,480
Size182.7 MB 177.4 MB
Events in quadrant A1,223,5901,199,865
Events in quadrant B863,176769,871
Events in quadrant C1,205,6741,151,809
Events in quadrant D1,059,3141,065,690

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04300
B04300
C04300
D04300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0458900
B0960160
C0436840
D0457250

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A209976122.914702%
B20997865541.220174%
C209976172.938515%
D209975792.757537%

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 22342 20996 0 0 0.00% 0.00%
B 22342 20312 0 0 0.00% 0.00%
C 22342 20996 0 0 0.00% 0.00%
D 22342 20993 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 1263 11.73 317 296 82.4
A 0 29 1184 10.78 317 296 82.4
A 14 204 1073 9.43 317 296 82.4
B 2 9 707 10.0 228 216 49.1
B 5 225 611 8.04 228 216 49.1
B 2 8 603 7.88 228 216 49.1
C 12 241 865 6.81 318 295 83.7
C 2 191 824 6.32 318 295 83.7
C 12 250 822 6.29 318 295 83.7
D 3 14 831 6.85 301 274 81.3
D 4 246 820 6.71 301 274 81.3
D 3 31 812 6.62 301 274 81.3

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