ASTROSAT CZTI

Data Quality Report

Orbit 21557

Creation date: 2024-06-27T18:29:14.965049
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/AS1A05_166T01_9000003192_21557cztM0_level2.evt modeM0/AS1A05_166T01_9000003192_21557cztM0_level2_quad_clean.evt
Size (bytes)1,090,601,280212,584,320
Size1.0 GB 202.7 MB
Events in quadrant A6,258,0831,413,003
Events in quadrant B6,920,5541,415,903
Events in quadrant C6,421,6861,393,937
Events in quadrant D12,534,9181,301,522

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0272342
B0288232
C0277492
D0465142

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02680
B02680
C02680
D02680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A132391891.427600%
B132392191.654203%
C132402451.850453%
D1324010007.552870%

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 14579 13242 0 0 0.00% 0.00%
B 14579 13242 7 7 0.05% 0.05%
C 14580 13243 1 1 0.01% 0.01%
D 14580 13243 792 792 5.43% 5.98%

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 4 2 24429 70.6 1617 1584 323.6
A 13 254 21652 62.02 1617 1584 323.6
A 0 226 14024 38.45 1617 1584 323.6
B 0 228 166972 550.44 1605 1567 300.5
B 0 189 158823 523.32 1605 1567 300.5
B 0 230 148676 489.56 1605 1567 300.5
C 14 238 243085 679.36 1539 1548 355.5
C 3 233 175594 489.53 1539 1548 355.5
C 13 61 10982 26.53 1539 1548 355.5
D 1 52 5110952 13797.47 1532 1489 370.3
D 2 136 464253 1249.64 1532 1489 370.3
D 14 35 415054 1116.78 1532 1489 370.3

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