ASTROSAT CZTI

Data Quality Report

Orbit 35835

Creation date: 2022-06-08T16:26:18.471791
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/AS1A11_080T01_9000005146_35835cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35835cztM0_level2_quad_clean.evt
Size (bytes)1,007,455,68094,993,920
Size960.8 MB 90.6 MB
Events in quadrant A13,686,410477,999
Events in quadrant B5,099,534624,473
Events in quadrant C5,268,679606,734
Events in quadrant D5,879,030572,213

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290
B0290
C0290
D0290

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01760
B01760
C01760
D01760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0464893
B0206952
C0209012
D0232212

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8554420649.169979%
B85541762.057517%
C85542683.133037%
D85544425.167173%

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 11481 8556 3973 3973 34.60% 46.44%
B 11481 8556 77 77 0.67% 0.90%
C 11481 8556 250 250 2.18% 2.92%
D 11481 8556 393 393 3.42% 4.59%

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 15 169 10800398 76366.33 701 688 141.4
A 10 83 164194 1156.17 701 688 141.4
A 13 254 8907 58.12 701 688 141.4
B 5 255 634530 3334.58 1001 975 190.0
B 4 232 216504 1134.39 1001 975 190.0
B 5 172 161566 845.24 1001 975 190.0
C 15 208 525484 2321.39 969 978 225.9
C 15 214 350027 1544.84 969 978 225.9
C 0 10 347594 1534.07 969 978 225.9
D 13 249 531513 2245.43 964 939 236.3
D 7 223 526123 2222.62 964 939 236.3
D 2 250 369733 1560.77 964 939 236.3

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