ASTROSAT CZTI

Data Quality Report

Orbit 00848

Creation date: 2024-06-27T14:03:46.772566
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/AS1P01_156T01_9000000118_00848cztM0_level2.evt modeM0/AS1P01_156T01_9000000118_00848cztM0_level2_quad_clean.evt
Size (bytes)1,140,563,52062,496,000
Size1.1 GB 59.6 MB
Events in quadrant A8,574,601356,711
Events in quadrant B9,066,149354,789
Events in quadrant C8,329,028354,144
Events in quadrant D8,113,828343,780

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0303470
B0318580
C0296400
D0289970

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6922250.361167%
B6922430.621208%
C6922330.476741%
D6921881.271493%

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 7797 6922 231 231 2.96% 3.34%
B 7797 6922 325 325 4.17% 4.70%
C 7797 6922 187 187 2.40% 2.70%
D 7796 6921 300 300 3.85% 4.33%

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 15 171 41162 72.4 2218 2241 537.6
A 15 17 26930 45.93 2218 2241 537.6
A 11 79 8052 10.81 2218 2241 537.6
B 5 200 115730 209.58 2292 2303 541.2
B 2 2 52620 92.97 2292 2303 541.2
B 5 249 35286 60.94 2292 2303 541.2
C 15 241 43576 70.63 2099 2181 586.1
C 3 111 27331 42.91 2099 2181 586.1
C 7 159 17696 26.47 2099 2181 586.1
D 10 85 278222 433.26 2056 2137 637.2
D 1 4 64830 98.38 2056 2137 637.2
D 13 169 45399 67.89 2056 2137 637.2

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