ASTROSAT CZTI

Data Quality Report

Orbit 35376

Creation date: 2022-04-21T14:34:04.043534
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_099T01_9000005068_35376cztM0_level2.evt modeM0/AS1A11_099T01_9000005068_35376cztM0_level2_quad_clean.evt
Size (bytes)634,222,08046,696,320
Size604.8 MB 44.5 MB
Events in quadrant A2,772,671291,487
Events in quadrant B9,014,176201,794
Events in quadrant C3,149,285284,310
Events in quadrant D3,917,411269,058

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280
B0280
C0280
D0290

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0111883
B0303212
C0122272
D0153952

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5230120.229446%
B5230276752.906310%
C52301522.906310%
D5230801.529637%

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 7142 5231 4 4 0.06% 0.08%
B 7142 5231 2320 2320 32.48% 44.35%
C 7142 5231 117 117 1.64% 2.24%
D 7142 5231 59 59 0.83% 1.13%

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 10 83 113643 849.16 664 652 133.1
A 14 254 37366 275.92 664 652 133.1
A 9 143 35516 262.01 664 652 133.1
B 4 251 6265761 63830.29 518 507 98.2
B 5 200 409137 4163.11 518 507 98.2
B 5 172 162978 1655.25 518 507 98.2
C 0 10 423579 2883.08 632 638 146.7
C 15 214 214655 1458.9 632 638 146.7
C 15 208 26256 174.63 632 638 146.7
D 8 195 801961 5155.55 631 615 155.4
D 13 249 197669 1267.77 631 615 155.4
D 2 31 148345 950.44 631 615 155.4

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