ASTROSAT CZTI

Data Quality Report

Orbit 21687

Creation date: 2024-06-27T18:31:07.222722
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/AS1A07_006T04_9000003210_21687cztM0_level2.evt modeM0/AS1A07_006T04_9000003210_21687cztM0_level2_quad_clean.evt
Size (bytes)891,743,040154,782,720
Size850.4 MB 147.6 MB
Events in quadrant A6,082,768991,040
Events in quadrant B5,756,6761,024,952
Events in quadrant C6,142,388978,291
Events in quadrant D8,242,091892,813

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02340
B02340
C02340
D02340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0255682
B0244988
C0258482
D0322522

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A115673292.844298%
B115663693.190386%
C115664814.158741%
D1156611229.700847%

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 16359 11570 12 12 0.07% 0.10%
B 16358 11569 19 19 0.12% 0.16%
C 16358 11569 90 90 0.55% 0.78%
D 16358 11568 719 719 4.40% 6.22%

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 15 236 364856 1312.62 1389 1359 276.9
A 4 2 363271 1306.89 1389 1359 276.9
A 13 254 20069 67.56 1389 1359 276.9
B 3 64 160887 602.77 1397 1360 264.7
B 0 229 58805 217.06 1397 1360 264.7
B 0 190 33742 122.35 1397 1360 264.7
C 8 208 693817 2264.91 1332 1337 305.7
C 14 238 213307 693.29 1332 1337 305.7
C 10 23 17419 52.6 1332 1337 305.7
D 1 20 1423400 4583.16 1291 1247 310.3
D 7 238 741095 2384.3 1291 1247 310.3
D 1 52 426563 1370.66 1291 1247 310.3

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