ASTROSAT CZTI

Data Quality Report

Orbit 20180217_A04_115T02_9000001900_level2

Creation date: 2025-11-19T14:26:41.099254
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/AS1A04_115T02_9000001900cztM0_level2.fits modeM0/AS1A04_115T02_9000001900cztM0_level2_quad_clean.evt
Size (bytes)924,984,000826,390,080
Size882.1 MB 788.1 MB
Events in quadrant A5,706,4804,939,605
Events in quadrant B5,145,5484,464,560
Events in quadrant C5,689,0764,836,688
Events in quadrant D4,744,0364,065,961

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019980
B019980
C019980
D019980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02223910
B02739400
C02012110
D02874240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9803719191.957424%
B980371093711.155992%
C980376710.684435%
D9803792019.385232%

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 111567 98030 0 0 0.00% 0.00%
B 111567 96398 0 0 0.00% 0.00%
C 111567 98037 0 0 0.00% 0.00%
D 111566 97957 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 5455 11.02 1487 1389 369.0
A 7 110 4569 8.62 1487 1389 369.0
A 9 19 4224 7.68 1487 1389 369.0
B 2 9 4547 12.14 1354 1289 268.4
B 3 17 3430 7.98 1354 1289 268.4
B 14 254 3396 7.85 1354 1289 268.4
C 1 80 4075 6.89 1502 1395 389.2
C 1 81 3956 6.58 1502 1395 389.2
C 12 241 3933 6.52 1502 1395 389.2
D 3 14 3533 6.4 1350 1227 360.2
D 6 231 3330 5.84 1350 1227 360.2
D 7 5 3289 5.72 1350 1227 360.2

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