ASTROSAT CZTI

Data Quality Report

Orbit 20191231_C05_004T01_9000003404_level2

Creation date: 2025-12-08T00:37:51.042442
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/AS1C05_004T01_9000003404cztM0_level2.fits modeM0/AS1C05_004T01_9000003404cztM0_level2_quad_clean.evt
Size (bytes)1,400,806,0801,512,302,400
Size1.3 GB 1.4 GB
Events in quadrant A8,603,7249,411,506
Events in quadrant B8,255,3289,425,792
Events in quadrant C8,430,0228,951,268
Events in quadrant D7,198,0748,081,497

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02978040
B03102870
C03070230
D04046060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A029860
B029860
C029860
D029860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02370
B02360
C02380
D02360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14487616281.123720%
B14488128061.936762%
C14488428601.973993%
D14486662514.315022%

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 171394 144903 0 0 0.00% 0.00%
B 171394 144893 0 0 0.00% 0.00%
C 171394 144912 0 0 0.00% 0.00%
D 171394 144845 0 0 0.00% 0.00%

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 0 29 8331 11.34 2241 2109 548.5
A 7 110 7061 9.03 2241 2109 548.5
A 0 30 6384 7.79 2241 2109 548.5
B 2 9 6668 10.78 2190 2100 423.7
B 2 8 5709 8.52 2190 2100 423.7
B 3 17 5394 7.77 2190 2100 423.7
C 1 81 6555 7.96 2225 2091 560.7
C 1 80 6508 7.88 2225 2091 560.7
C 3 234 6098 7.15 2225 2091 560.7
D 3 14 5212 6.18 2055 1871 540.2
D 6 231 5073 5.93 2055 1871 540.2
D 6 67 5031 5.85 2055 1871 540.2

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